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• Creating a new PC, need suggestions on parts [closed]

  - by zilentworld

  I want to build a new PC and went around PC Stores to ask for quotations with only some parts that i want and the rest are filled up by them. Here is the "best" i got Core i5 3550 4gb ram ddr3 (planning to get 8,no brand yet) 500gb hdd (no brand yet) GTX550Ti 1g DDR5 Asus P8H61 ATX Casing Here is what i have from my last PC: Huntkey green power 500w Hyper TX3 Evo I want a dual monitor pc which will be used mostly for gaming,programming and i do a lot of multitasking. Im not planning YET to OC my cpu but i will in the near future. So can i ask for suggestions on what to change on my list? my budget is about 800$ (including 2nd monitor)

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• How to copy bytes from buffer into the managed struct?

  - by Chupo_cro

  I have a problem with getting the code to work in a managed environment (VS2008 C++/CLI Win Forms App). The problem is I cannot declare the unmanaged struct (is that even possible?) inside the managed code, so I've declared a managed struct but now I have a problem how to copy bytes from buffer into that struct. Here is the pure C++ code that obviously works as expected: typedef struct GPS_point { float point_unknown_1; float latitude; float longitude; float altitude; // x10000 float time; int point_unknown_2; int speed; // x100 int manually_logged_point; // flag (1 --> point logged manually) } track_point; int offset = 0; int filesize = 256; // simulates filesize int point_num = 10; // simulates number of records int main () { char *buffer_dyn = new char[filesize]; // allocate RAM // here, the file would have been read into the buffer buffer_dyn[0xa8] = 0x1e; // simulates the speed data (1e 00 00 00) buffer_dyn[0xa9] = 0x00; buffer_dyn[0xaa] = 0x00; buffer_dyn[0xab] = 0x00; offset = 0x90; // if the data with this offset is transfered trom buffer // to struct, int speed is alligned with the buffer at the // offset of 0xa8 track_point *points = new track_point[point_num]; points[0].speed = 0xff; // (debug) it should change into 0x1e memcpy(&points[0],buffer_dyn+offset,32); cout << "offset: " << offset << "\r\n"; //cout << "speed: " << points[0].speed << "\r\n"; printf ("speed : 0x%x\r\n",points[0].speed); printf("byte at offset 0xa8: 0x%x\r\n",(unsigned char)buffer_dyn[0xa8]); // should be 0x1e delete[] buffer_dyn; // release RAM delete[] points; /* What I need is to rewrite the lines 29 and 31 to work in the managed code (VS2008 Win Forms C++/CLI) What should I have after: array<track_point^>^ points = gcnew array<track_point^>(point_num); so I can copy 32 bytes from buffer_dyn to the managed struct declared as typedef ref struct GPS_point { float point_unknown_1; float latitude; float longitude; float altitude; // x10000 float time; int point_unknown_2; int speed; // x100 int manually_logged_point; // flag (1 --> point logged manually) } track_point; */ return 0; } Here is the paste to codepad.org so it can be seen the code is OK. What I need is to rewrite these two lines: track_point *points = new track_point[point_num]; memcpy(&points[0],buffer_dyn+offset,32); to something that will work in a managed application. I wrote: array<track_point^>^ points = gcnew array<track_point^>(point_num); and now trying to reproduce the described copying of the data from buffer over the struct, but haven't any idea how it should be done. Alternatively, if there is a way to use an unmanaged struct in the same way shown in my code, then I would like to avoid working with managed struct.

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• My Computer will not turn on?

  - by user269120

  I recently built a gaming pc. It was working fine before the following events: I installed a graphics card driver update then: in windows it said that the user experience index needed to be refreshed, so i started the test and somewhere in the middle of the test my pc just switched off. No shutting down just stopped. Now it won't turn back on. I have checked its plugged in and the switch on psu is down, i tried a different power cable and i checked all the connections. When i press the power button nothing happens, no fans no lights no post beep. Computer Parts: Motherboard: Gigabyte GA78LMT-USB3 CPU: AMD FX-6350 @ 3.9 Ghz RAM: 2x4gb Crucial Ballistix Sport Power Supply: Tesla 750w psu Graphics card: XFX Radeon 7870 DD Case: CiT Vantage R Gaming Case Hard Drive: 2TB Western Digital Caviar Green Please help me, this computer is only a week old since i built it. All anwsers are appreciated :)

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• Is is better to combine Apache for file manipulation and upload and Nginx for static file serving, or to use one of the two alone

  - by user1032393

  Based on my research, I've read that nginx is best and ideal for serving up static files and images. My application depends heavily on uploading of images and rewriting them, then serving them up. Given that I only have one VPS currently, it has been suggested that I use nginx to serve up the images and website, and reverse proxy to Apache (on the same VPS) to rewrite files with image magick and handle the file uploads. Which would be the best solution, Apache, Nginx, or Apache + Nginx? In terms of best solution, I'm looking at minimal average RAM consumption, while maintaining decent load speed of maybe sub 2 seconds?

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• Windows 7 boot error 0xc0000225 after falling down

  - by Hulehule20

  My Toshiba netbook fell down and hasn't booted again. When I start Windows 7 it immediately says: Windows failed to start... Status: 0xc0000225 Info: The boot selection failed because a required device is inaccessible. After that, there are a few things to consider: There's a Linux distro Linkat which is also installed in the computer. It starts normally without any problem and it doesn't seem to display any errors when it boots. I restored all computer OSs with clonezilla and some images provided by the manufacturer, and it's done nothing. I have already checked the basic components of the PC (RAM, Hard Disk, WLAN Card) are pluged in and working. My impression is that's all about some broken part inside, though the Linux OS starts normally. Does anyone know a way I can fix this or at least any software for identifying the problem at all?

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• Installing XAMPP on a live server [on hold]

  - by Eeeearth

  I am trying to get phpMyAdmin on my live server so I can do database programming on a live server rather than a local one. I have 2 servers at the moment, one through 1&1 which is a Windows Server 2008 and through RAM-Host which is running CentOS. I am just trying to figure out what I need to do to install XAMPP on the LIVE server, as opposed to accessing through localhost, for obvious reasons. Do I install XAMPP the same way I did on my local, but on my server? Essentially I would like to access the phpmyadmin via: mydomain.com/phpmyadmin, just as I would locally using localhost/phpmyadmin. Again, sorry for any ignorance here I just can not find any information on what to do for this.

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• When NOT to use virtualisation? [closed]

  - by Nils

  When virtualisation was new, we tried to virtualized everything. Then came the cases where the virtual machine was very much slower than a physical one. It boils down to the following ruleset (with us) when not to virtualize: Network-io-intesive applications (i.e. with many interrupts/packets) Disk-io-intensive (if not on SAN storage) RAM-intensive (this is the most precious resource) Now this is true for a combination of XEN using local DRBD storage. The same seems to be true for Hyper-V using DAS. I wonder - is it true for all combinations - and what are your limits on these combinations?

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• ATI HD 5970 display

  - by user55406

  Hello everyone i'm a little worry about my graphic card. before I get into that I will tell you my system specs. I have intel dx58so mainboard, 6gb corsair xms ddr3 ram, intel i7 960 cpu, and ati hd 5970. I'm also using a coolmaster haf92 case. My OS is vista X64. Here is my issue when I type in dxdiag in (Start Search) and I look into display. I see in (approx total memory) 716mb graphic memory. The ati hd 5970 is a 2gb graphic card. Am I being stuipd or is there an issue.

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• Virtualizing Windows with VT-d to play within it

  - by Bahaïka

  I would like to know if what I want to is possible. First, here is my hardware configuration : MB : Gigabyte H77-DS3H Intel Core i5 3330 (3.00GHz) MSI Nvidia GTX 760 8 Gb RAM 1333 MHz What I want to do is to have a linux (probably ArchLinux) as a main and unique OS on my computer (I don't want a dualboot). And virtualizing Windows under Linux. I've read about VT-d (supported by my CPU) and PCIBackHide. I'd like to know if I can initialize Linux with the Integrated Graphics and Virtualize Windows to use the GTX 760. If I can do it, where do I have to plug my two screens ? On the MainBoard or the GTX 760 ? How do I achive that idea ?

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• In terms of load handling, which is better: one server or two of equivalent power?

  - by seldary

  My goal is to figure out if i'm better off with one strong server, or multiple weaker servers with a load balancer. Does the fact of splitting the load between servers have an effect on the total load my website could take? It's hard to single that out, because there are of course a lot of parameters that affect the results, so some assumptions: Putting failover considerations aside - I know it matters, but for the sake of the question's simplicity, lets assume nothing fails. The servers in the multiple servers option have an accumulated "power" equivalent to the one server option (about the same amount of cores and RAM space). If that is too theoretical, here is a concrete question that could help: Suppose I have several instances of exactly the same server - lets call it S. Suppose that server S can serve a load of up to X calls per time unit. Will two S servers with a load balancer serve 2X calls per time unit? significantly more? significantly less?

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• Hardware needed for 2000 users? [closed]

  - by Trcx

  I have school assignment that is fairly well defined, requiring us to come up with a plan for an environment serving dynamic web applications to 2000 users, and should be able to scale up to six thousand. I have done plenty of research as far as load balancing, redundancy, UPSs, etc, but am having a hard time figuring out how much hardware is actually needed in the way of physical servers, ram, processing power, etc. The assignment states that the server will have a lot of dynamic code, email, and a database are required, all utilizing the appropriate microsoft service (MS SQL, Exchange, IIS). I already plan on splitting them out on to separate servers, but can't even fathom the hardware requirements of something that large scale. Could someone with experience weight in on this, or point me two some good articles?

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• Ctrl-t / New-Tab in Internet Explorer 11 on Windows 8.1 Pro Doesn't Work

  - by Atlscrog

  Steps: Open IE on the desktop. Observe that home page opened. Click around (or not) and observe IE works. Either type ctrl-t or click on the new tab area next to current tab. Observe no new tab opens and the current page is now blank. At this point IE is inoperable and requires a restart. It seems to work fine in the Metro interface. I have reset the Internet Options and removed and re-added Internet Explorer under "Turn Windows Features on or off". Help :) Windows 8.1 Pro, 64-bit IE 11 AMD Phenom II X2 560 3.30 GHz 8 GB RAM

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• How create a virtual network for practice?

  - by light

  I need to organize a virtual network for practice with Windows Server 2008 and several workstations with Windows OS. To make it all I only have a laptop with Dual-Core 2.10Ghz, 3 GB RAM, 50 GB free space and Windows 7 on it. Also I have external USB 3.0 hard-drive with 250GB free space and flash disk with 8GB space. What can you suggest? Because I have limited resources, I think to install ESXi 5.1 on the main disk of my laptop as second OS, with installed Windows 7. I have no idea will it work or not, but after that I want to try to create hosts using availible space on external hard-drive. Is it possible?

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• How many site visitors can my server handle? [closed]

  - by coolboycsaba

  I have a website, and I want to host it on my own computer, but I'm wondering if it's good enough. The website checks if the user is logged in and then displays 15 items (title, description) from a mysql database and the rating (stored in another database) and the comments (another database) for each item. It also displays some stats (number of items, comments). I also have an image for each item. My specs are: AMD Athlon 64 X2 Dual Core Processor 5600+ 2.90 GHz RAM: 4.00GB Windows 7 64bit So what do you think, how much visitors and items could it handle (at once or daily) ? My internet connection is good, around 7-10 mb upload and same download speed

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• Windows 7 100% Memory Usage (without any process listed as using that much memory)

  - by Paul Tarjan

  When I plug my external USB 2TB hard drive into my windows 7 box, my RAM usage climbs up to all 4 Gigs (but in task manager it shows that all process are small) and the hard drive is churning like crazy. My CPU is only about 20% utilized All I can think of is there is a Virus scanner or an indexer running like crazy. I've tried to kill all virus scanners (AVG and Windows Security Essentials) and it still keeps going. My computer is completely unusable as everything is constantly swapping. I've tried leaving it on for 2 days now and it still hasn't finished whatever it was doing. Any ideas?

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• Which UPS, for home use, which can automatically shutdown the PC when battery is low?

  - by Tony_Henrich

  I am planning to build a single server machine which is highly dependent on data residing in RAM for performance reasons. I am looking for a UPS which can power the PC during a blackout (very rare) and when the battery level is like %20, it sends a signal to Windows 2008 to shutdown. Even if it's only for a few minutes, that's good enough. This is for home use so I am looking for an inexpensive unit ( less than $300? ). Which brand/model is good choice? I prefer one whose battery is easily & cheaply replaced.

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• How to save your Linux state (suspend to disk) periodically to recover from crashes?

  - by WoLpH

  One in a while my laptop crashes/dies because of a bad/empty battery, crappy wifi driver or whatever other reason. For a while I've wondered if it's possible to force Linux to periodically save the state (like vmware snapshots) to disk so you can restore from that with possibly slightly outdated work but at least with all of your apps open in the same state you've left them. I don't really see the point in having to boot everything from cratch constantly, although KDE saves your state on logout, that doesn't happen periodically (by default) either. It would make it much nicer to recover from your crashes if your ram was written to disk periodically. Anyone know if there's a system call to do this without also shutting down the machine? Even a manual button to save the entire state would be nice.

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• Best Linux distro for media server on older box

  - by fauxpride

  I have an older machine with these specs: CPU: AMD Athlon X2 @ 2,8 Ghz, 2MB L2 RAM: 4 GB DDR2@ 800 Mhz GPU: Asus 4890 TOP 1 GB I want to turn the machine into a media server via XBMC (so good video and wireless peripherial driver support would also be a plus), but I also want to use it as an OpenVPN server so I can tunnel RDP to my other Windows machine in the network. I mostly want to use a Debian based distro (for the convenience of apt) and right now my options are: Ubuntu, Xubuntu or Mint. Which one do you think is more fitting? Thanks in advance.

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• CentOS I/O blocking flushing dirtypages

  - by user3662224

  I have an Apache webserver on CentOS. It is not doing anything fantastic or complicated at all but it does at intervals experience a high load (120 for 4 CPUs) for some reason. During this time I see high waits and write durations. I have narrowed this down to flushing of dirtypages to disk to make room for new data. I have tried many things and talked to the developers who are also puzzled by this. I am stumped. Details: vmware virtual guest server 4 cpus 12G RAM Apache PHP I have 40 servers in this cluster that share the same disk structure. Only the webservers are experiencing this issue. Any ideas?

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• What combination of soft to select? (your advice/opinion) [on hold]

  - by Flyer

  I'm thinking of upgrading my server soft along with OS. As of now, my VPS is running on Debian 6 with nginx (1.2.4) - apache (2.2.16). My VPS specs are 1Gb RAM, 2 cores of Intel(R) Xeon(R) CPU E5520 @ 2.27GHz. Now, here is the question. Which combo should I run? - nginx - apache (2.4.x) - PHP-fpm 5.5.x - nginx - apache (2.4.x) - mod_php 5.5.x - apache (2.4.x) - mod_php 5.5.x - apache (2.4.x) - PHP-fpm 5.5.x - nginx - PHP-fpm 5.5.x - nginx - mod_php 5.5.x I would really like some advice/opinion of people who are more experienced than me with these things. It's nothing big. Around 100-200k pageviews per month. I can also provide some screenshots of munin stats if needed.

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• Citrix on ESX 4 U1 - Slow login times

  - by thomps01

  I'm sure they'd be just as slow if not slower using ESX 3 but I'm looking for some assistance. On a physical Citrix server, logins are 1 - 4 seconds. The virtual - 16 - 23 seconds. I'm looking for performance enhancements that I can make to me VMs to try and reduce the login wait times. The hardware is fine (HP BL685 (24 cores, 64GB RAM). And there's nothing pushing it yet. Network 10Gb I'm planning to test the configuration with VMXNET3 tomorrow, but does anyone have a list a best practices I can use when testing?

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• What can i do when my Ubuntu stucked [closed]

  - by Avihai Marchiano

  From time to time firefox cause to my Ubuntu machine to stuck.(nothing run on the machine except firefox) I cant move the mouse or move windows by keyboard. In some cases i have wait for a few minutes and than close last open tab in firefox and it solve the problem in other cases i do restart. Is there any way to prevent it, limit forefox in some way? In windows in most cased even with 100% cpu you can do alt-ctrl-delete and get the task manager, is there a top priority combination in linux that give you terminal? Or any other way ... Run on Ubuntux86 with GNOME , 2GB RAM, dual core cpu

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• sqlserver.exe uses 100% CPU

  - by Markus

  I've created an application (asp.net) that once a day syncs an entire database through XML-files. The sync first creates an transaction and then clears the databases tables and then starts to parse and insert the new rows into the database. When all the parsing is complete it commits the transaction. This works fine on a SQL Server 2005 (on another machine), but on SQL Server 2005 Express, the process starts to use 100% CPU after a while, and as I log the inserts being made I can see that it just stops inserting. No exception, it just stops inserting. Anyone got any idea what this may be? I've previously run the syncronization on another sql 2005 express (also on another computer), and that worked. The server has only 2GB RAM, could this be the problem?

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• Ubuntu 12.04LTS mountall: Disconnected from Plymouth

  - by user169954

  I have ubuntu 12.04LTS 64bit running on an i5 dual core 8G RAM. On startup I get the message mountall: Disconnected from Plymouth [OK] And the system looks stuck. However, if I go to tty1, then I can login and startx and everything seems to be fine except for being a bit sluggish. I can verify that my nfs mounts are ok, and that my swap is ok. Every time I reboot the system there is a _gdm_gdm_crash file in my /var/crash, which makes me think my problem is rooted in gdm, X configs and/or nvidia drivers. A bit of background in case it's relevant: 3 hours ago my desktop crashed. Following various 'tips' on the web I made a complete mess of my X server and X configuration files, and at one point I even had to recreate my swap partition. Anyway, after much struggle I managed to get to the state I mentioned above: I have a working system provided I always login through tty1. What is this Plymouth anyway? Would it make a difference if I used gnome-wm instead of gdm or lightdm? (I mean to the startup, not to me :-) What bit of config do I change to tell startx to use gnome-wm not gdm or ligthdm? Thank you in advance

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• Ubuntu 13.10 install ISO crashes on VirtualBox Mac 4.3

  - by John Allsup

  Does anybody know what to do about this? Machine is a 2008 Core 2 Duo iMac with 4GB RAM. (And 64bit Debian 7 boots OK, but I've not tried installing under the latest version of VirtualBox as I have just upgraded VBox today.) VirtualBox 4.3, upon trying to boot a machine with the Ubuntu 13.10 (64bit) iso (with the VM configured for Ubuntu 64bit) crashes, with the following information: Failed to open a session for the virtual machine Ubuntu64. The VM session was aborted. Result Code: NS_ERROR_FAILURE (0x80004005) Component: SessionMachine Interface: ISession {12f4dcdb-12b2-4ec1-b7cd-ddd9f6c5bf4d} === Head of crash dump is below Process: VirtualBoxVM [716] Path: /Applications/VirtualBox.app/Contents/MacOS/VirtualBoxVM Identifier: VirtualBoxVM Version: ??? (???) Code Type: X86 (Native) Parent Process: VBoxSVC [644] Date/Time: 2013-10-17 22:58:23.679 +0100 OS Version: Mac OS X 10.6.8 (10K549) Report Version: 6 Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000040 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 com.apple.CoreFoundation 0x92a25c03 CFSetApplyFunction + 83 1 com.apple.framework.IOKit 0x95557ad4 __IOHIDManagerInitialEnumCallback + 69 2 com.apple.CoreFoundation 0x92a2442b __CFRunLoopDoSources0 + 1563 3 com.apple.CoreFoundation 0x92a21eef __CFRunLoopRun + 1071 4 com.apple.CoreFoundation 0x92a213c4 CFRunLoopRunSpecific + 452 5 com.apple.CoreFoundation 0x92a211f1 CFRunLoopRunInMode + 97 6 com.apple.HIToolbox 0x98eb5e04 RunCurrentEventLoopInMode + 392 7 com.apple.HIToolbox 0x98eb5af5 ReceiveNextEventCommon + 158 8 com.apple.HIToolbox 0x98eb5a3e BlockUntilNextEventMatchingListInMode + 81 9 com.apple.AppKit 0x9971b595 _DPSNextEvent + 847 10 com.apple.AppKit 0x9971add6 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 156 11 com.apple.AppKit 0x996dd1f3 -[NSApplication run] + 821 12 QtGuiVBox 0x019f19e1 QEventDispatcherMac::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 1505 13 QtCoreVBox 0x018083b1 QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 65 14 QtCoreVBox 0x018086fa QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 170 15 QtGuiVBox 0x01eea9e5 QDialog::exec() + 261 16 VirtualBox.dylib 0x011234b8 TrustedMain + 1108104 17 VirtualBox.dylib 0x01126d68 TrustedMain + 1122616 18 VirtualBox.dylib 0x010fac19 TrustedMain + 942057 19 VirtualBox.dylib 0x010f9b3d TrustedMain + 937741 20 VirtualBox.dylib 0x010f81dd TrustedMain + 931245 21 VirtualBox.dylib 0x010f85b8 TrustedMain + 932232 22 VirtualBox.dylib 0x0109d4f8 TrustedMain + 559304 23 VirtualBox.dylib 0x0101521e TrustedMain + 1518 24 ...virtualbox.app.VirtualBoxVM 0x00002e7e start + 2766 25 ...virtualbox.app.VirtualBoxVM 0x000024b5 start + 261 26 ...virtualbox.app.VirtualBoxVM 0x000023e5 start + 53 ==== And please somebody fix the code so that you can just delimit large blocks of code at the start and the end without indenting every line manually by 4 spaces.

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