Homebuilt System is failing quite badly :/ Need Help!

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Robbaazz

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May 20, 2012
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Hello, I built my system several months ago and have had the same problem ever since when using my 6950... I started getting occasional coloured screens and then my system would restart. I now got a replacement card (6950 again) and the issue repeats but even worse and more frequent. This does not happen when I have my nVidia 9500Gt installed. Could it be the PSU as both both 6950s require 2 6-pins whereas the NVIDIA card requires none? This is all I can think of.

Specs-
Mobo - Asus M5A78L-M/USB3
CPU - AMD Phenom II x4 965 Stock
RAM - 8GB Corsair Vengeance
Videocard - Was an XFX HD 6950 1gb, now an XFX 6950 2GB. System shuts down with both of them installed but not my nvidia card.
PSU - Coolermaster GX650w

Thanks.
 
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Cyberman222

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Aug 3, 2012
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I have heard that Coolermaster's are not very reliable and I have seen someone who has had a near situation as yours with a Coolermaster, try getting a different PSU, only a suggestion so don't expect it to be right :p
Good luck :S
 
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Robbaazz

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May 20, 2012
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That's what I'm thinking of doing, but since I have just had to fork out extra for a new GPU, can you recommend any cheap but reliable PSUs for me? Thanks.
 
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Cyberman222

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Aug 3, 2012
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It depends what range of money you are looking at, I found a Corsair 650w which are incredibly reliable, but at that are expensive (depending on the budget) I'll give you a link to it and if it isn't the right country then just search Google :p
One other thing though, are you sure you need 600w? I'm not convinced but I'm not sure, obviously the less Wattage, the less expensive so I would try finding out :p http://www.onestoppcshop.co.uk/cmpsu-650txv2.html
 
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Cyberman222

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Aug 3, 2012
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I'm not too sure about 430w, I would say 500w is a good place to sit at :p If I'm not right, someone correct me :D
 
manofchalk

manofchalk

Glorious
May 11, 2012
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The wattage in the name isn't necessarily representative of its abilities. With branded PSU's this isn't really problem, but I have a generic that claims 520W, but can only provide 260W through the 12v rail (which powers the CPU and GPU). You must be careful to not pick a PSU with an inflated number (turns out they had included all the other rails in the count).

Look up the power draw of your CPU and the GPU in question. Then check the PSU's specs, somewhere it will say " +12V@??" with the questions marks being a number. Multiplying the voltage (12 in this case) with the Amps (the number represented by the question marks) will give you the wattage it can supply, if its above what the CPU, GPU will draw under full load (preferably with 100W or more to spare), power isn't an issue.

This doesn't apply to generics by the way, they are of such poor quality that you cant even be assured that the specs are right. PSU's do degrade over time as well, so take that into account if its a few years old.

The Power supply OP has will output 624W through the 12v rail, which is more than enough for a Phenom and a single 6950. Power isnt the problem.
Link to PSU, can check yourself.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817171052

I'd be more inclined to believe that you haven't installed drivers yet, or its trying to apply the nVidia drivers to the card, and that's whats messing it up. Uninstall all video card drivers and download the latest from AMD.

 
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Robbaazz

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May 20, 2012
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I will try this, how do I get rid of nVidia drivers? As when I go to delete them, they say they are already in use and I cannot delete the folder.
 
manofchalk

manofchalk

Glorious
May 11, 2012
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Have you installed the AMD driver?

I'l admit I'm not sure now. It cant be a manufacturing defect because its happened on two separate cards. It may be a heat issue, but thats pretty unlikely. Have you overclocked them at all, or do they come factory OC'ed? Were you using the same cable between the cards and monitor? Particularly if it was a VGA cable.
 
smorizio

smorizio

Titan
Jan 22, 2010
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rob try this. boot into your mb bios and look at the rev of the bios. right it down and look at the speed in the bios that your ram running at. while in there make sure your first video boot device is set to the gpu. (could be that with onboard video being ati and another ati card there trying to run crossfire or there using the same memory rang or the ati drivers having issue with to amd gpu. with the bios info make sure you have all the bios patches installed. if they are try running cpu-z and gpu-z make sure in cpu-z that your ram is set to the right speed. (new gpu is faster card so it going to hit your cpu and ram harder). if there an issue with one of them your system may reboot. I would also go to amd site make sure you install the newest amd mb chipset drivers and video chipset drivers. after you reboot go into windows system if you see two gpu listed. I would disable the onboard gpu. if the issues still there I would see if the video card vendor can switch the amd card with a nvidia one.
 
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Robbaazz

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May 20, 2012
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The Ram timings are fine, I updated my BIOS 1months ago, updated mobo drivers etc... I think it might be a hardware issue or a PSU issue :/ Im not too sure.
 
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Guest

Guest
Generally if the PSU turns on then it`s good. However, like with anything else, there are exceptions. At this point, You`re going to have try a different PSU.
If you were to search for cooler master PSU, then you would see they are very unreliable. PC reboots when GPU loads the PSU, happens all the time - PSU...
 
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Robbaazz

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May 20, 2012
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Right guys, before I buy a new power supply tommorow, could this be a serious reason for the issue or am I being a ''noob''?
Please, need replies fast/
 
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FLanighan

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Jul 19, 2009
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There's a chance (albeit small) that it could be system memory causing it. I once had an issue where my games would get these trippy visual glitches that weren't artifacts. In several of my games I would see certain textures out of place or completely missing.
It turned out to be the new ram I had installed.
 
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Guest

Guest
Based on what you`ve told us is wrong and some things you`ve already tried - PSU.
I still think your new GPU is too much for your PSU. And yes, this would mean the PSU is faulty because 600w is plenty for your system.
I had a system last year that would randomly restart and it ended up being the psu. Where are you buying this PSU? Check return policy and if PSU is not the problem, then simply return or exchange it for something else.
 
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Robbaazz

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May 20, 2012
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PCWorld in the UK, and when my dad is purchasing it tommorow morning, he is double checking that I can return it if It does ''not fit in my case'' if you get what I mean? :)
 
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Guest

Guest


Quick check is to boot with only one stick at a time and see if any improvement. Hope you get your computer working, it`s a nice build and you`ll certainly like it.
 
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