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• What’s the best way to label cables in a data center

  - by Ben

  We're in the midst of planning for a big data center renovation at my office, which is going to result in a completely new power and network infrastructure. As part of this, I'd like to label all of our cables properly and sanely. What are your best practices, both for labeling patch panels, cables, power whips, anything and everything in a data center that you'd label?

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• Motherboard Wiring

  - by JT

  HI All, I bought a new case to put a motherboard in. Everything fits, I have done this before, but not in a long time! The case has wires for - Power SW - Reset SW - Power LED - HDD LED On the motherboard (ASUS M2NPV-VM) it is clearly labeled where these go, but I cannot remember where the black wire for each goes versus the colored wire? I don't want to put it backwards, wont I blow the motherboard?

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• How to shutdown VMware Fusion virtual machine on host shutdown

  - by Nikksno

  I have a Mac mini running Mavericks server. I installed the Atmail server + webmail vm [a linux centos distribution] in VMware Fusion Professional 6 with the VMware Tools addon. It works flawlessly. I've set it to start on boot and that works very reliably. However I've been looking for a way to also safely and gracefully shut it down whenever OS X shuts down for whatever reason. The Mac is connected to a UPS and configured to perform an automatic shutdown in case the battery starts running low so that's no additional problem. Now the first thing I did was to go into Fusion's prefs and select "Power off the vm" when closing it. However I noticed that for some arcane reason closing the vm window would actually forcibly power off the vm: so then I found this post that showed me how to change the default power options and I managed to have the vm cleanly shutdown when closing its window or quitting Fusion altogether. At this point I was hoping to have solved the problem but as it turns out upon invoking system shutdown OS X doesn't wait for the vm to shutdown and terminates Fusion before it has a chance to do so. At this point I started looking for a way to automate the process of shutting down the guest os via some advanced setting but had no luck in doing so. That's when I found a command to shut the vm down: vmrun and it worked. The only thing left was to find out a way to execute this script on os x shutdown and giving it a little time to power off completely. However this turned out to be a nightmare: I spent hours looking through several ways to do this with Startup Items, rc.shutdown, cron, launchd, etc... but none of them worked the way I had configured them. I have to say that I found very limited information on using launchd for a shutdown script execution and I know it's the latest thing in the OS X world so I'm hoping someone out there among you will be able to help me out with this. I still think this is an extremely basic feature to ask for and I was really surprised to find this little documentation on so many different aspects of this problem. Is Fusion too basic of an application for this? I really hope someone can help. Thank you very much in advance.

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• iPhone 3.1 Black Screen

  - by churnd

  Since I've updated my 3G iPhone to 3.1, it will become unresponsive after ~4-5 hours. It looks like it's off, but it's not. None of the buttons do anything that I can see. The only way I can get a screen back is to do a hard reset (Power + Home). Has anyone else had this problem? What can I do to fix it? I've had it 3 happen 3 times already. Very annoying. Apparently, the Discussions forum on Apple.com also shows lots of people are having the same problem. One guy said he did a restore and that fixed it for him, which I haven't tried yet because many others also tried that and it didn't help. A few others have said turning off WIFI fixes it for them, so I'm going to try that today. Another thing I've noticed is that now, when I plug in my iPhone to my Macbook Pro, iTunes 9 does not launch. It used to before the update. ** Further update and possible solution ** I left my iPhone plugged into my Macbook Pro yesterday while at work, and didn't use it much throughout the day. I noticed it didn't lock up once. I suspect this was because it was connected to a power source. I continued to use my iPhone with no problem yesterday and today. Still no lockups as of now. I personally think this was Spotlight and/or Genius "doing it's thing" from a new install. Kinda like an OS upgrade on your Mac... Spotlight has to rebuild itself and those first couple of hours can be kinda sluggish. This would be even more so on the iPhone where processing power is limited, and I'm sure the processor is clocked down a bit while on battery power, which would further amplify the problem. Again, just my guess. My iPhone is working fine now. ** Final Solution ** Update to 3.1.2. Problem solved.

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• Turn off laptop CD-ROM

  - by Stan

  Since I seldom use the built-in cd-rom, but usually carelessly press open door button which is on the side of laptop. Is there any way to power off cd-rom so the button won't work. Better not to open the back lid and unplug power cable.

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• Gateway GT5220 Boot/POST Failure

  - by John Rudy

  I have a Gateway GT5220 I'm troubleshooting. It is, in fact, the machine I just gave my father for his birthday a couple months ago. (Prior to that, it was my home PC. My home PC is now the MacBook on which I'm writing this.) Before going any further, I suspect that the answer will be, "It's worse than that, it's dead, Jim, it's dead, Jim, it's dead, Jim." At least, mobo and/or CPU. The initial symptoms were as follows: Turn on power All fans fire up (thus making it so I can't hear if the hard drive is spinning or not, nor are my hands sensitive enough anymore to feel it) No LEDs remained lit on the front panel. (Initially, the hard drive indicator flashed briefly.) No beep, no video, no nothing. Following some advice I found here, I tried to "drain the stored power." After following those steps, the new symptoms were: Turn on power All fans fire up The front panel LEDs remained lit! After about 20, maybe 30 seconds, we had video! Sort of. We got to the Gateway splash/POST screen, which appeared thoroughly corrupted. How corrupted? Well, I imagine it's what a POST screen would look like after reading the wrong passage out of the Necronomicon: It stayed there. I gave it at least 5, maybe 6 minutes, and it didn't move. So I shut her down, started her up again, and now (this is where we currently stand, symptomatically) we have this: Turn on power All fans fire up The front panel LEDs remain lit No video, no beep, no nothing. I'm a software guy; haven't done real hardware troubleshooting in years. My gut tells me that the mobo and/or CPU is fried, and unfortunately my gut didn't get to be as big as it is being wrong all the time. :( In addition to the link above, I have read all of the following (trying to save you some LMGTFY trouble): Gateway Support POST Error Messages and Handling About a zillion (useless) POST beep code sites A kioskea.net post indicating that most likely we're at what I consider "total loss" (mobo and/or CPU) My questions: Are there any conditions other than mobo/CPU that could cause symptoms like these? Is it worth my time to try the next hardware troubleshooting step?(IE, remove all non-critical hardware from the machine, try to boot, systematically replace one by one until we find the failing component) Which mobos will fit in the Gateway GT5220 case (with rear ports correctly aligned)? (Why this is not a dupe: I wouldn't have posted this question if it hadn't been for the funkadelic possessed video display on the one occasion we got video out. I think that justified this not being an exact dupe. Of course, if the community overrules, I will understand.)

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• Any rerefence of CPU world statistics?

  - by Áxel Costas Pena

  I am looking for any referencee about computer power statistics across the world. My main interest is about real computing capabilities, so I'd prefer information about real processor power, and even best if it includes also other critical hardware statistics, like RAM memory, but if it isn't possible, maybe statistics about brand/model distribution will be also useful. I've Googled for some minutes and I've found nothing related.

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• Why do my Taskbar icons disappear after a reboot

  - by cruz

  W7 Pro 64 bit is networked and configured the reg key %USERPROFILE%\Desktop as [driveletter]:\Desktop. After a power off\power on, it shows all my Desktop icons & Taskbar pinned icons.

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• Does a router have a receiving range?

  - by Aadit M Shah

  So my dad bought a TP-Link router (Model No. TL-WA7510N) which apparently has a transmitting range of 1km; and he believes that it also has a receiving range of 1km. So he's arguing with me that the router (which is a trans-receiver) can communicate with any device in the range of 1km whether or not that device has a transmitting range of 1km. To put it graphically: +----+ 1km +----+ | |------------------------------------------------->| | | TR | | TR | | | <----| | +----+ 100m+----+ So here's the problem: The two devices are 1km apart. The first device has a transmitting range of 1km. The second device only has a transmitting range of 100m. According to my dad the two devices can talk to each other. He says that the first device has a transmitting and a receiving range of 1km which means that it can both send data to devices 1km away and receive data from devices 1km away. To me this makes no sense. If the second device can only send data to devices 100m away then how can the first device catch the transmission? He further argues that for bidirectional communication both the sender and the reciver should have overlapping areas of transmission: According to him if two devices have an overlapping area of transmission then they can communicate. Here neither device has enough transmission power to reach the other. However they have enough receiving power to capture the transmission. Obviously this makes absolutely no sense to me. How can a device sense a transmission which hasn't even reached it yet and go out, capture it and bring it back it. To me a trans-receiver only has a transmission power. It has zero receiving power. Hence for two devices to be able to communicate bidirectionally, the diagram should look like: Hence, from my point of view, both the devices should have a transmission range far enough to reach the other for bidirectional communication to be possible; but no matter how much I try to explain to my dad he adamantly disagrees. So, to put an end to this debate once and for all, who is correct? Is there even such a thing as a receiving range? Can a device fetch a transmission that would otherwise never reach it? I would like a canonical answer on this.

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• Ubuntu Lucid: Erratic screen behaviour after boot

  - by fgysin

  In short: about 50% of the time I have a screwed up monitor setup after reboot. About 50% it is totally correct. Now the longer version: I updated my machine from 9.04 to 10.04 (via 9.10). At first I run into some monitor problems (I have a 3-monitor setup) because of the known bug in the new xserver driver for xinerama. This messes up behaviour if the mouse goes either left or above the screen number 0, i.e. I had to make my left-most monitor screen 0. Everything worked out fine finally, I got my 3-monitor setup back with xinerama enabled to get one big desktop streched over 3 screens. Now the fun part: Every time I start up my machine only one of the 3 monitors gets a signal and is woken up: it only recognizes the left-most monitor (screen 0) and crams all the desktop stuff into this one screen. If I go into nvidia settings I only see one physical device although all 3 are connected and have power. When I look into the xorg.conf I can still see my old setup with 3 devices, 3 screens, xinerama active etc... But I was totally unable to get 3 montitors to work. (I tried unplugging monitors, reconfiguring whole nvidia setup, ...) But it gets even better: When I restart my machine (i.e. choose the restart option from the Ubuntu menu) it shuts down and tries to restart. The restart then gets stuck after showing the Ubuntu splash screen with the 'loading bar' (the moving dots thingy) and I am forced to kill the machine by cutting power. But after the power cut the machine boots up normally and suddenly I get my 3 monitor setup back up working. That is until the next time I shut down and start up, where it all starts over again and I only have one monitor... (see above) I really have a hard time seeing where the error is. It must be that the restart boot somehow differs from the 'normal' boot. But the fact that it gets stuck and I need to cut power which then basically triggers a 'normal' boot does not really support this theory... My setup (please tell me if you need further info): 3 monitors as 3 screens as one desktop (with xinerama) 2 nvidia cards where screen 0 and 1 are on card 0 and screen 2 is on card 1 Ubuntu 10.04 Lucid Lynx (updated from 9.10, 9.04, ....) I would appreciate every idea on the subject, at the moment I really don't have any clue what to do...

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• LTSP keeping sessions active whilst turning off thin clients

  - by map7

  I'm using LTSP on a Ubuntu 10.04 64bit box with 8 thin clients. I would like to save power by automatically turning off the thin clients at night, but I would like to have the ability to resume the staff's session in the morning. Is it possible to keep a session running whilst turning off the LTSP thin client and resuming that session when you power up the thin client the next time? Could this work if you login to another thin client in the morning and resume your session?

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• HP DX5150, MS-7050 v. 1.3 Motherboard front panel pin connectors

  - by Daniel

  I recently purchased and installed a MS-7050 v. 1.3 motherboard into a regular non-HP case and thus the front panel connectors are different than the original OEM connectors which are all bundled together. The HP support website does not have this information available and someone from HP indicated in response to a support forum question that this information is not available. What is the motherboard pin schematic for the front panel i/o connectors (power, reset, hdd led, and power led)?

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• usb mouse connecting and disconnecting randomly and often

  - by Kalec

  Yes, I know this question has been asked here before but I can't add to the discussion over there and it did not help me, so here goes nothing. I've bought an acer aspire 5742G about 2 months ago or so and it's been running great, but sometimes I used to hear the windows error beep but I had no idea what was causing it since the "bug" was automatically fixed so fast I couldn't even see an error message (also it kinda always happened when I was busy also, either in a game or while doing my homework). Later on my mouse would simply not work for 3-5 seconds then work again, I thought nothing of it at the time. I also had a problem where it only worked in one usb and one only ... to move it I had to remove the battery, unplug the laptop and hold the power button for 2 minutes to reset the bios settings. Since today though it went nuts ... sometimes it disconnects / reconnects 12 times in 10 seconds and windows just keeps beeping till I unplug it, then it runs smooth for 5-6 minutes then it goes nuts again. Other times it seems like it skips (disconnects for a fraction of a second) other times just for 2-3 seconds. But this is incredibly frustrating. Sometimes the power just goes down (the laser turns off) and well that at least I would understand but this is a rare occurance. Now I know the usb ports work since I have a lot of other devices connected and I tried the mouse on a room m8's laptop so the mouse also works. My only conclusion is that it's an operating system / settings bug and / or problem (I have tried the mouse in all ports by the way). All drivers and bios are up to date (maybe except mouse but i can't seem to update that and the mouse has no name, just a serial number which helps with nothing. Still it worked till today and nothing should have changed any way). I have made sure windows can't shut it down to save power (in device management). Also I tried to delete the drivers and re-install them, rebooting and the power button trick but nothing ... most I have done is get rid of the 12 discconnects / reconnects every 10 seconds :) but that's all :( I would buy a new one but I'm afraid it might do the same thing :| ****EDIT****** Tried the mouse again at a friend but now it didn't even install it's software nor did the update work ... think I'll just buy a new one but I'd still like a suggestion at least so I'll leave this open

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• Easy Install Resets Hardware Settings

  - by bob5972

  I think there's a problem with the Easy Install setup. I selected "Installer disc image," and it came up and said that it would use "Easy Install," I think I hit next, and then I went back changed my mind, and selected "I will install the operating system later." After finishing the wizard, I think it still went and ran Easy Install, because it auto-installed VMware tools and I never got to select anything for my windows setup. Then, when it was finished, all the hardware changes I had made were lost. The RAM was changed from 2 GB back to the default of 1 GB, my CD ROM drive was set back to "Use a Physical Drive" and "Connect at Power On", and the Floppy Drive was also set to "Connect at Power On", after I disabled them. I was trying to install Windows 7, and I wasn't sure if I could change the RAM settings after installation without needing to reactivate it, so I deleted the VM and tried to start over. This time, the "Installer disc image" had my Win7 image pre-selected, so I clicked "I will install it myself later," set my hardware again, and tried to boot off my CD. Again,it did an Easy Install, and reset my RAM and my drive settings. So I deleted it again and the third time it still had the Win7 image pre-selected, but this time I unplugged all the drives and let it try to boot off the empty harddrive and fail, and made sure it kept all my hardware settings. Then, I powered it off, put my Win7 image in the guest CD ROM, and powered it on. This time it finally let me run the installer and pick my language, and type a user name. This time when I powered it off it kept my hardware settings. I can duplicate the error by doing exactly the steps above. Creating a new VM, selecting my "Installer Image," hitting next, going back, selecting "I will Install it myself," and then finish the wizard, and customizing my hardware right before the end, setting the CD Rom drive to the same installer media, and setting "Connect on Power On." (If I start it without the CD ROM in the first time, it doesn't do it). When I power on, I'm not prompted for any install information (like language and user name), and when it runs the first timemy hardware choices are reset (like the RAM back to 1 GB). If it helps, I'm running VMware Workstation 7.0.1 build-227600 on Gentoo Linux

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• Easy Install Resets Hardware Settings

  - by bob5972

  I think there's a problem with the Easy Install setup. I selected "Installer disc image," and it came up and said that it would use "Easy Install," I think I hit next, and then I went back changed my mind, and selected "I will install the operating system later." After finishing the wizard, I think it still went and ran Easy Install, because it auto-installed VMware tools and I never got to select anything for my windows setup. Then, when it was finished, all the hardware changes I had made were lost. The RAM was changed from 2 GB back to the default of 1 GB, my CD ROM drive was set back to "Use a Physical Drive" and "Connect at Power On", and the Floppy Drive was also set to "Connect at Power On", after I disabled them. I was trying to install Windows 7, and I wasn't sure if I could change the RAM settings after installation without needing to reactivate it, so I deleted the VM and tried to start over. This time, the "Installer disc image" had my Win7 image pre-selected, so I clicked "I will install it myself later," set my hardware again, and tried to boot off my CD. Again,it did an Easy Install, and reset my RAM and my drive settings. So I deleted it again and the third time it still had the Win7 image pre-selected, but this time I unplugged all the drives and let it try to boot off the empty harddrive and fail, and made sure it kept all my hardware settings. Then, I powered it off, put my Win7 image in the guest CD ROM, and powered it on. This time it finally let me run the installer and pick my language, and type a user name. This time when I powered it off it kept my hardware settings. I can duplicate the error by doing exactly the steps above. Creating a new VM, selecting my "Installer Image," hitting next, going back, selecting "I will Install it myself," and then finish the wizard, and customizing my hardware right before the end, setting the CD Rom drive to the same installer media, and setting "Connect on Power On." (If I start it without the CD ROM in the first time, it doesn't do it). When I power on, I'm not prompted for any install information (like language and user name), and when it runs the first timemy hardware choices are reset (like the RAM back to 1 GB). If it helps, I'm running VMware Workstation 7.0.1 build-227600 on Gentoo Linux

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• my 4 month old 500 GB SATA HDD making noise

  - by Jitendra vyas

  my 4 month old 500 GB SATA HDD making noise, somrtime and pc hangs when it make noise when noise is over then desktop work fine. it's not happens daily but it happens. IS something wrong with HDD, or Data, power cable, or my Cabinet's power supply. should i run scandisk, defragmentation to whole disk.

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• USB mouse connecting and disconnecting randomly

  - by Kalec

  I've bought an acer aspire 5742G about 2 months ago or so and it's been running great, but sometimes I used to hear the windows error beep but I had no idea what was causing it since the "bug" was automatically fixed so fast I couldn't even see an error message (also it kinda always happened when I was busy also, either in a game or while doing my homework). Later on my mouse would simply not work for 3-5 seconds then work again, I thought nothing of it at the time. I also had a problem where it only worked in one usb and one only. To move it I had to remove the battery, unplug the laptop and hold the power button for 2 minutes to reset the bios settings. Since today though it went nuts. Sometimes it disconnects / reconnects 12 times in 10 seconds and windows just keeps beeping till I unplug it, then it runs smooth for 5-6 minutes then it goes nuts again. Other times it seems like it skips (disconnects for a fraction of a second) other times just for 2-3 seconds. But this is incredibly frustrating. Sometimes the power just goes down (the laser turns off) and well that at least I would understand but this is a rare occurrence. Now I know the usb ports work since I have a lot of other devices connected and I tried the mouse on a room m8's laptop so the mouse also works. My only conclusion is that it's an operating system / settings bug and / or problem (I have tried the mouse in all ports by the way). All drivers and bios are up to date (maybe except mouse but I can't seem to update that and the mouse has no name, just a serial number which helps with nothing. Still it worked till today and nothing should have changed any way). I have made sure windows can't shut it down to save power (in device management). Also I tried to delete the drivers and re-install them, rebooting and the power button trick but nothing. Most I have done is get rid of the 12 disconnects / reconnects every 10 seconds :) but that's all :( I would buy a new one but I'm afraid it might do the same thing. ****EDIT****** Tried the mouse again at a friend but now it didn't even install it's software nor did the update work. Think I'll just buy a new one but I'd still like a suggestion at least so I'll leave this open #### EDIT 2 Now it works again, I can't explain this. Still thinking of getting a new one though

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• How can i find the trigger of an acpi event ?

  - by n00ki3

  My Server shutsdown . Evertime at midnight. The acpi Event power_button is triggered. at /etc/acpi/events/power_button power_button: # care about the power button event=button/power.* action=/usr/lib/acpid/power_button How can i find out the "Caller" or the Trigger of this event ?

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• Is there considerable energy saving using a black background on my website?

  - by isolatedIterator

  I had heard that you can save power by using a black background instead of a coloured background. Is there any evidence that this saves power on people's monitors? Is this a way that we can cut down on energy consumption (millions of users times milli-watts add up over time). It could also affect battery life on mobile devices.

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• Disable laptop CD-ROM drive

  - by Stan

  Since I seldom use the built-in cd-rom, but usually carelessly press open door button which is on the side of laptop. Is there any way to power off cd-rom so the button won't work. Better not to open the back lid and unplug power cable.

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• How to make a boot profile permanent?

  - by Usman Ajmal

  Hi, I have a Finnix live CD. I can customize it by remastering it. When I boot with the live CD I need to make a little change in the boot profile The boot profile before making the changes is linux apm=power-off vga=791 initrd=minirt quiet The boot profile after making the change become linux apm=power-off vga=791 initrd=minirt quiet root=/dev/sr0 Now, I need to make this change (adding root=/dev/sr0) permanent. How can I do that?

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• Ubuntu Lucid: Erratic screen behaviour after boot

  - by fgysin

  In short: about 50% of the time I have a screwed up monitor setup after reboot. About 50% it is totally correct. Now the longer version: I updated my machine from 9.04 to 10.04 (via 9.10). At first I run into some monitor problems (I have a 3-monitor setup) because of the known bug in the new xserver driver for xinerama. This messes up behaviour if the mouse goes either left or above the screen number 0, i.e. I had to make my left-most monitor screen 0. Everything worked out fine finally, I got my 3-monitor setup back with xinerama enabled to get one big desktop streched over 3 screens. Now the fun part: Every time I start up my machine only one of the 3 monitors gets a signal and is woken up: it only recognizes the left-most monitor (screen 0) and crams all the desktop stuff into this one screen. If I go into nvidia settings I only see one physical device although all 3 are connected and have power. When I look into the xorg.conf I can still see my old setup with 3 devices, 3 screens, xinerama active etc... But I was totally unable to get 3 montitors to work. (I tried unplugging monitors, reconfiguring whole nvidia setup, ...) But it gets even better: When I restart my machine (i.e. choose the restart option from the Ubuntu menu) it shuts down and tries to restart. The restart then gets stuck after showing the Ubuntu splash screen with the 'loading bar' (the moving dots thingy) and I am forced to kill the machine by cutting power. But after the power cut the machine boots up normally and suddenly I get my 3 monitor setup back up working. That is until the next time I shut down and start up, where it all starts over again and I only have one monitor... (see above) I really have a hard time seeing where the error is. It must be that the restart boot somehow differs from the 'normal' boot. But the fact that it gets stuck and I need to cut power which then basically triggers a 'normal' boot does not really support this theory... My setup (please tell me if you need further info): 3 monitors as 3 screens as one desktop (with xinerama) 2 nvidia cards where screen 0 and 1 are on card 0 and screen 2 is on card 1 Ubuntu 10.04 Lucid Lynx (updated from 9.10, 9.04, ....) I would appreciate every idea on the subject, at the moment I really don't have any clue what to do...

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• laptop battery isn't seen

  - by doug

  Hi there, I have a laptop, which was most of the time on wired power. Now it seems to not work at all on battery and in Control Panel-Power Option battery isn't recognized at all(is 0%). Do you have any idea about what can I do? ps: my laptop is Acer Aspire 1640z and I'm using Windows XP SP3

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• Restarting an IBM BMC without restarting the server itself

  - by SRobertJames

  I have a few servers with IBM BMC (Baseboard Management Controller). I'd like to power cycle the BMC without restarting the server. Is this possible? How? Note: On one of them, the web interface is down; so I'd need to either do this by physically restarting the BMC (not sure how to do this - even the power button on the server isn't supposed to recycle the BMC, I believe) or via the UDP or SNMP interface (again, not sure how to do that either)

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• Poor performance of single processor 32bit Windows XP xompared SMP in VBA+Excel

  - by Adam Ryczkowski

  Welcome! On many computers I experienced poor performance of 32 bit guests running on 64 bit Linux host (I used only the Debian family). At last I managed to collect benchmark data. I made the benchmark by running custom VBA macro, (which we use in our company) that generates 284 pages long Word document full of Excel Pie charts, tables and comments. The macro is run as a single task (excluding the standard services) on a set of identically configured Windows XP 32-bit systems. I measured the time (in sec.) needed to perform the test. The computer (i.e. my notebook Asus P53E) supports both VT-d extensions and native Windows XP. It has 2-core processor, each core is hyperthreaded, so in total we have 4 mostly independent execution units. I use the latest VirtualBox 4.2 and VMWare Workstation 9.0 for Linux, installed together on the same host (running Mint 13 Maya) but never run simultaneously. The results (in column Time) are no less accurate than ± 10% Here are the results (sorry for the format, but I couldn't find out a better solution for tables in SO): +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ | Host software | # processor | Windows kernel | IO APIC | VT-x/AMD-V | 2D Video Accel | Time | +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 1 | 0 | 1139 | | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 1 | 1 | 1050 | | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 0 | 1 | 1644 | | VirtualBox | 4 | ACPI Multiprocessor PC | 1 | 1 | 1 | 6809 | | VMWare | 1 | ACPI Uniprocessor PC | | 1 | 1 | 1175 | | VMWare | 4 | ACPI Multiprocessor PC | | 1 | 1 | 3412 | | Native | 4 | ACPI Multiprocessor PC | | | | 1693 | | Native | 1 | Advanced Configuration and Power Interface (ACPI) PC | | | | 1170 | +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ Here are the striking conclusions: Although I've read in the VirtualBox fora about abysmal performance with 32-bit guest on 64-bit host, VMWare also has problems compared to native run, still being twice faster(!) than VBox. Although VBA is inherently single-threaded, the Excel calculations, which take much more than a half of total computation time, supposedly aren't. So one would expect some speed gain when running on 2+ cores ("+" for hyperthreading). What we see is a speed loss. And quite big one too. For the VirtualBox the VT-d extension isn't a big deal. Can anyone shed some light on why the singlethreaded Windows kernel is so much faster than the SMP one?

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