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  • SNMP based network discovery (switches), device (ports on switches) power management

    - by SaM
    In a enterprise network, what would be the right way to generate a list of switches (SNMP managed) Is it reasonable to ask the organization to supply a list such as this: Switch name IP Address of switch Location SNMP community strings Or are there standard ways to run discovery scans - UDP broadcasts? After having generated a repository such as the above; given a single switch, how to query it for the list of all devices attached to it? Finally, how to selectively power down/power up ports? (remotely - using SNMP) Platform is going to be .NET based (C#) and the library being used is SharpSNMP

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  • Computer won't power on

    - by briskmojo
    Was working fine for over a year, now won't boot. LEDs on the GFX card and one on the MOBO labeled PWR glow when plugged in, but nothing happens when I push power and shorting switch pins does nothing either. If I pop out the CMOS battery and put it back in then try the fans lurch but nothing happens. Shorting the 15 and 16 pins turns the PSU on, and when the 24pin connector is attached to the MOBO it will start up briefly then stop. If I plug in the CPU header it returns to what I described, no power but will lurch after replacing the CMOS battery. Should I be shopping for a new PSU or is there another problem maybe?

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  • Intel mobile CPU power consumption at idle levels?

    - by Ivan Petrushev
    I was wondering if someone has observations (or specifications) of different mobile processors power consumption levels when idle? Let's define 'idle' with 'browsing web sites trough wifi, no flash, no multitasking'. There are different series processors, recognizable by their first letter. The letter tells about the maximum TDP. For example: T - 30-39W P - max 25W L - 12-19W U - <12W However this is about maximum consumptions during load. Is there any difference in power levels when the CPU is idling?

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  • Where does power consumption go in a computer?

    - by Johannes Rössel
    Today we had a weird discussion over lunch: What exactly causes power consumption in a computer, particularly in the CPU? Figures you usually see indicate that only a percentage (albeit a large one) of the power consumption ends up in heat. However, what exactly does happen with the rest? A CPU isn't (anymore) a device that mechanically moves parts, emits light or uses other ways of transforming energy. Conservation of energy dictates that all energy going in has to go out somewhere and for something like a CPU I seriously can't imagine that output being anything but heat. Us being computer science instead of electrical engineering students certainly didn't help in accurately answering the question.

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  • How to power off a hard drive to essentially "hot swap"

    - by Brandon
    I'm looking for either freeware or the programming basics to power off/on a hard drive. Mounting and unmounting a hard drive is simple enough just using the command prompt in Windows XP. Now I need to be able to power down the hard drive so it will not become damaged when being unplugged. I would prefer this to be a simple doable in the command prompt, a simple script, or at worst C++/C#. Freeware that does this exact requirement would also do the job. This script/program will run on Windows XP with .NET 2.0 SP1.

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  • Minimum power requirement for VGA vs. its working

    - by Shiki
    Got a new XFX GTX260^2 video card. The only problem is the "Minimum power" is 500W on the box. I've got a Chieftec 450AA PSU with just a minimal number of attached stuff (1hdd, WD green; 6gb (4module) ram; dvd writer). Bought a cable for the 6pin power input on the card. Got picture, works in every aspect. Still. Should I get a new PSU (like a Corsair or Antec 600W)? Will the card perform slower with this PSU? (Yeah the last part is a particular question but in I'm also asking in generic. I was wondering about this so many times and I hope we'll put and end for this question for once and for all.)

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  • PSU failing or Mainboard failing?

    - by Andrei Rinea
    I am having some troubles lately powering on my desktop workstation. While starting up the PC after being off for hours (usually at least 8 hours) it randomly fails to do so. What happens is that : I press the power button; nothing happens I can hear a moderate buzzing noise at the back of the PC (near the PSU); but I can't say for sure that it's not from the mainboard. If I insist pressing the power button a few times in 1-2 minutes it'll start Another route would be that instead of (3) I will plug off the power cable from the PSU and wait for 30 seconds. Then I will press the power on and keep it for 30-60 seconds (I had some success at notebooks with a similar approach). Then I will plug back the cable in the PSU, press only once the power button and it will start normally. Also while running normally I keep hearing some low buzzing which seems to be fan-RPM-related (i.e. when processing images or doing CPU intensive work). What should I look into? UPDATE It's getting worse. It took more than 10 retries today and almost 20 minutes to start the computer. I tried the paperclip trick and the PSU behaves perfectly. I managed to start the computer like so : I pressed the on-button a few times and then left the PC in a pre-startup state (the fans were working the buzzing noise was strong and I went to eat. I thought I won't lit the house on fire so fast and without smelling. Back, after 10-15 min the computer booted up! Discussed with a fellow at Intel and he told me the capacitors on the mainboard are probably a bit shot. If they are shot, he said, it should start up warm perfectly. So I did restart it, warm, a few times (5 sec cooldown and then 40 sec cooldown and it started up perfectly). I can either replace the capacitors on the mainboard (doesn't sound worth it or replace the mainboard (this one sucks too :)) ) FINAL INFO : It was the PSU after all. Although it was powering the IDEs and SATAs the Mainboard power module was failing. I bought another mainboard just to find out that this wasn't the cause. Now I'll have to return it somehow. The spare PSU is now in the computer and doing well.. Although larger (500W), it's like a plane taking off.. I need a better one.

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  • Which Power supply I should buy

    - by arayman
    I am going to buy a new PSU of CORSAIR for my IBM thinkcentre desktop. My previous original PSU was of 230 watts. I have not added any hardware in the CPU. It's in same condition as it was when I bought. On that basis, please suggest which power supply of Corsair and of how many watts will be suitable for me to buy, after referring to the under given weblink. http://www.corsair.com/en/power-supply-units.html Thanks.

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  • Understanding why a 450W power supply is destroying my ATX motherboards but not mATX

    - by T. Webster
    Maybe I'm missing something really obvious here, but after going through 3 new motherboards in trying to build my new machine, I'm finally certain that the 450W power supply I bought has been destroying them. It seems like it should be simple: just connect the connectors where they fit and switch the thing on. But today after hooking it to my ASUS Sabertooth 990FX TUF Series Motherboard and switching it on, I could see and smell the smoke coming out of the motherboard. What I don't get is why I can hook this same 450W power supply up to my mATX motherboard and not run into the same problem. What am I missing here? Where on the box or manual is this? (I have 8x2 GB RAM, AMD FX-4100 3.6GHz CPU, 1 512MB ATI graphics card, 1 WD 7200 RPM SATA hard drive. )

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  • Laptop screen turns off on removing power cord

    - by YatharthROCK
    After a recent upgrade to Windows 8.1 Pro from W8, my laptop's screen turns off as soon as you remove the power cord. It turns back on with no issues when you plug the power back in. Keyboard and mouse input is processed while the screen is off. My settings tell the screen to go off after 2 minutes of inactivity on battery. I was having a battery issue from before where my laptop would should down after 5 minutes of running on battery (despite showing 60% left), but I think that's unrelated. Any other info will be provided on request. Can anyone help me figure out what's going on? How can I stop this behaviour?

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  • Motherboard dual gfx power question

    - by user33931
    1st, I am software guy. I do not do hardware. So I know to you hardware geeks, this is a dumb question. I just inherited a box with a ASUS P5GZ-MX mother board. I have attempted to install two nVidia PCI video cards. I put a 750w power supply in the system to be sure I have enough power. With no extra video cards, the 3.3 v shows normal. When I put one card in, the 3.3 goes to 3.5-3.6 and flashes red (over voltage) about 30% of the time. When I put the 2nd card in, it goes to 3.73 v and stays red all the time. Any Ideas why the voltage goes up when I add cards instead of going down? More Importantly, is this dangerous to the system?

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  • Power Management with Oracle VM Server for SPARC

    - by Honglin Su
    With the introduction of Oracle VM Server for SPARC 2.2, it includes power management features which can be set via the service processor (ILOM) of the supported SPARC T-Series systems. Watch this video to learn about the hardware power savings capabilities available on SPARC T4 systems, and how Oracle VM Server for SPARC makes use of them. The video will show you how to choose a power management policy and set a power cap. For more information, read the OTN technical article "How to Use the Power Management Controls on SPARC Servers".

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  • Upgrading memory on an IBM Power 710 Express (8231-E2B)

    - by cairnz
    We have a Power 710 Express server that was loaded with 4x4 GB memory on a single riser card. I have replaced the 4 chips with 4x8GB and put in another riser card and loaded it with 4x8GB more for a total of 64GB memory. The firmware is AL730_078. When i power it on, the service processor boots up and i can access the ASMi. From here I can look at "Memory Serial Presence Data" and see that the system in some way detects 8x8 GB. However when i look at Hardware Deconfiguration and specifically Memory Deconfiguration, it is still listed with old values, 16384MB, and claims there are 4x4 chips in the C17 riser. How do i proceed to make the server recognize properly the amount of memory installed? I get a FSPSP04 and B181B50F progress code on booting because (i think) it hasn't been told the memory has changed. It then does not proceed to booting the operating system (VIOS) when turned on. Are there any steps I have overlooked here? Can I do some commands, either on the service processor, or otherwise, to tell the system to configure with the proper amount of memory? PS: This is a stand alone server, not configured with HMC or SDMC.

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  • Cannot change power button or lid close action

    - by Mark Henderson
    I have a Samsung 900x laptop and I want to change it so that when I close the lid, nothing happens (I often close the lid to carry it somewhere 10 seconds away, and by putting it into suspend it cancels any active downloads/etc). Easy, right? Go to Power Options and change it there; just like on every other laptop in the world. Not so fast: Saywhat?! That message only shows up for the nodes for Lid Close Action, Power Button and Sleep Button. I can change every other setting except for those three. I'm definately an Administrator on the computer, and I've googled the error and found dozens of hits on other crappy forums, but of course nothing on those worked (otherwise, I wouldn't be here). And as ususal the "Why can't..." hyperlink gives no useful infomation what so ever (just a generic Help document). So - how can I change what closing the lid does? I will modify the registry directly if I have to.

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  • Can I use this power supply + case combination without causing problems?

    - by evan
    I am putting together a computer with a Antec P180 case and a Thermaltake TR2 RX 650 W power supply. The problem is that the Antec P180 case has a separate compartment for the power supply. With an opening for the on/off switch + ac connector to one side, a wall with a small hole for cables to route through on top, a wall on the bottom, and on the other side a fan which pushes air from the hard drive compartment to the power supply compartment. I think the design of the case assumes the power supplies fan is on the side next to the on/off switch, but the fan on the power supply I have is on top, which makes me worry about overheating the power supply. There is about half an inch between the top of the power supply and the wall and the other fan should keep air flowing to push out the air that the power supply pushes upwards. Do you think this setup should work, or should I go get another power supply? Thanks!! PS: This computer will be running an Ubuntu server, so it will always be on, but the rest of the components shouldn't be generating as much heat as they would on say a gaming machine.

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  • Laptop power button not working

    - by DyP
    I have a (seemingly rather exotic) Dell Latitude XT2 notebook running Lubuntu 12.04, fresh install. Tried to get the power button to work as expected (opening lubuntu-logout, just as I think it was meant to be out-of-the box), but no success: power button does nothing but forced power-off on long press. Here some more information, please ask if something more could help: Power button is recognized as a device: xinput lists Power Button as a slave keyboard at /dev/input/event1, and I can run a tool to listen to that device and invoke some action (successfully). But using .config/openbox/lubuntu-rc.xml to assign some action to XF86ShutDown or XF86PowerOff does nothing. Works well for any key of the keyboard. xinput --test reports a keycode (key press, key release) of 124 when pressing & releasing the power button. xmodmap -pk lists 124 mapped to XF86PowerOff which seems correct to me (btw: is this the same as XF86ShutDown?) When assigning another keysymname to the 124 keycode, e.g. 'w', still nothing happens when pressing the power button (no window seems to receive a 'w'). Works well for any key on the keyboard. The outputs of xev for a press/release of the power button irritate me: MappingNotify event, serial 41, synthetic NO, window 0x0, request MappingKeyboard, first_keycode 8, count 248 FocusOut event, serial 41, synthetic NO, window 0x2a00001, mode NotifyGrab, detail NotifyAncestor FocusIn event, serial 41, synthetic NO, window 0x2a00001, mode NotifyUngrab, detail NotifyAncestor KeymapNotify event, serial 41, synthetic NO, window 0x0, keys: 93 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (instead of 93, I also get different values) I might have missed something very basic since I'm not very familiar with both openbox/lubuntu and the X input system. Btw.: same goes for three other special buttons on my laptop..

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  • What is this very short power cable called?

    - by Portman
    I have a couple of networking components in my rack that take giant AC adapters ("power bricks") that don't fit neatly into my rackmount PDU. I have one "thingy" that is shown below, and I need to buy a few more. But I have no idea what I'm searching for because I don't know what the "thingy" is called. Yes, this drawing is terrible. I would ask my 4-year-old to draw it for me because she's a better artist, but she's taking a nap.

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  • Palit GeForce 8800GT 512MB Minimum Power Requirement?

    - by Wesley
    Hi all, I am building a system for a friend. The potential specs are like this so far: ASUS A8N-VM motherboard AMD Athlon 64 3200+ @ 2.0 GHz Any 7200RPM SATA HDD Palit GeForce 8800GT 512MB GDDR3 PCIe One DVD/CD combo drive Creative SB Live! 5.1 sound card I was wondering what wattage of power supply would be able to support this hardware. I had a 350W in mind... would that do? Thanks in advance.

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  • Power plan override?

    - by CChriss
    Anybody know of a program that can detect if you're viewing a video, and if you are, prevent the current power plan from turning off the monitor and/or putting the computer to sleep? (For Windows 7, or one for Vista might also work.) Thanks.

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