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What are some signs of psu not cutting it for crossfired 6970s?

post #1 of 15
Thread Starter 
Ok before I post exactly whats going on 1st id like to hear some opinions on a psu not having enough power to run your cards, Ive been getting some really weird things happening with my system and I don't know if its driver related or psu not having enough juice to run these dual 6970s!..... 4 example when I open the game Metro- go into graphics settings and change x4msaa to msaa I get a blue screen of death, or a minute or so into the game! The funny thing is it only happens in metro no other games, heres what iam running Amd drivers 10.4 because theres some kind of issue with 970 chipset running crossfire so iam forced to use old drivers ( when will there be a fix for this?) ..... I tried overclocking the cards and running metro-crash! Put em back to stock config-Crash~! .....Is it my psu? Its a coolermaster 750 watt gx series bronze certified, the psu dosent feel hot at all during gaming but I am worried about it running a slight oc on my cpu as well,what do you guys suggest I do?
I can always take out 1 card until I change my psu but again id like to know if this is driver related or psu before I start changing parts. Thanks thumb.gif
     
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post #2 of 15
Read the JonnyGURU review of that model, it's essentially over-rated crap.

Seventeam is the OEM manufacturer, all the capacitors are from Su'scon (which is below CapXon, for crying out loud!), and won't provide stable power over 600w. The ripple is terrible, and its 80-Plus rating is essentially fraudulent.

In short, get a different PSU, posthaste. You can get a really nice Rosewill Capstone 750w unit for $100 currently. Its OEM is Super Flower, uses all Nippon Chemi-Con capacitors, and delivers excellent power regulation.
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post #3 of 15
While that is a decent recommendation svenge, it doesn't really help explain if this is actually a PSU problem. I would lean toward a driver, memory or card problem.
 
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post #4 of 15
Thread Starter 
Love the zombies avatar check this out lol( zombatar) zombie boggie.jpg.
Ive ruled out its the cards because ive tested them in single use and neither fail at anything so iam leaning towards driver or psu ( iam gonna change this psu anyway regardless) .... But like I said theres some kind of issue with amds 970 chipset and crossfire I just hope theres a fix soon this is pretty annoying
     
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post #5 of 15
Quote:
Originally Posted by nz3777 View Post

Love the zombies avatar check this out lol( zombatar) Ive ruled out its the cards because ive tested them in single use and neither fail at anything so iam leaning towards driver or psu ( iam gonna change this psu anyway regardless) .... But like I said theres some kind of issue with amds 970 chipset and crossfire I just hope theres a fix soon this is pretty annoying
Make sure the crossfire bridge is securely fastened and that all power connectors are in properly. If you're going to change the PSU anyway then that may solve the problem, 6970s are very power hungry and you're pushing the PSU to the limits.

As svenge has stated it should be treated as a 600W, as soon as you go over that the voltage plummets, the ripple hikes up and the 'bronze' efficiency goes out the window. I can't believe CM actually advertise it as having a max output of 900W.
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post #6 of 15
Thread Starter 
It says 750 watt andy, sorry if i didnt specify. I might just take 1 card out to be sure until i change this junk of a psu! I paid over $100 for that thing but didnt know much about anything at that time. Thanks guys
     
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corsair vengence BLUE  baracuda seagate 7200 rpm asus sata 24x drw thermaltake contac 30 cpu cooler 
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coolermaster 430 elite logitech mk 260 logitech mk 260 sony reciver hooked up to asus optical port 
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2 blue cathode lights and 4 coolmax blue led f... Modright sleeved blue molex to sata x 4  
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amd fx 6100 asus m5a97 msi radeon 6970 Msi radeon 6970  
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corsair vengence BLUE  baracuda seagate 7200 rpm asus sata 24x drw thermaltake contac 30 cpu cooler 
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windows 7 home premium 64 bit LG 26 inch led 1900x1080 resolution logitech mk 260 coolermaster 750 watt gx bronze 
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coolermaster 430 elite logitech mk 260 logitech mk 260 sony reciver hooked up to asus optical port 
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2 blue cathode lights and 4 coolmax blue led f... Modright sleeved blue molex to sata x 4  
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post #7 of 15
Quote:
Originally Posted by nz3777 View Post

It says 750 watt andy, sorry if i didnt specify. I might just take 1 card out to be sure until i change this junk of a psu! I paid over $100 for that thing but didnt know much about anything at that time. Thanks guys
It's rated for 750W but CM say on their website that it has a max output of 900W which is never going to happen in a million years.

Do you know what PSU you'll be replacing it with?
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post #8 of 15
Thread Starter 
It does? Strange!..... Ah so far the ones ive seen ill tell u what I like so far- 1) kingwin laser series 1000 watt modular not sure if its bronze certified or platinum? Theres a Corsair I like but its kinda pricy because iam trying to stay in the 1000 watt range incase I add another gpu ( most likely) ......$150 id like to spend max on a psu,id spend more but budget dosent allow it lol:thumb:
     
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coolermaster 430 elite logitech mk 260 logitech mk 260 sony reciver hooked up to asus optical port 
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2 blue cathode lights and 4 coolmax blue led f... Modright sleeved blue molex to sata x 4  
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amd fx 6100 asus m5a97 msi radeon 6970 Msi radeon 6970  
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corsair vengence BLUE  baracuda seagate 7200 rpm asus sata 24x drw thermaltake contac 30 cpu cooler 
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windows 7 home premium 64 bit LG 26 inch led 1900x1080 resolution logitech mk 260 coolermaster 750 watt gx bronze 
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coolermaster 430 elite logitech mk 260 logitech mk 260 sony reciver hooked up to asus optical port 
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post #9 of 15
It seems like it wouldn't be a PSU because you are not stressing them when they crash, only changing settings. While your PSU may not be great, I dont think its whats causing your current problem. Are you running 6870s or 6970s? Your rig and title say 2 different things. I would also stay away from tri fire 6970s. It would be easier and less of a headache to sell both your GPUs and buy a single GPU rather than running Trifire. You are also running over 3 year old drivers, so I would point to that before a PSU problem.
post #10 of 15
Quote:
Originally Posted by nz3777 View Post

It does? Strange!..... Ah so far the ones ive seen ill tell u what I like so far- 1) kingwin laser series 1000 watt modular not sure if its bronze certified or platinum? Theres a Corsair I like but its kinda pricy because iam trying to stay in the 1000 watt range incase I add another gpu ( most likely) ......$150 id like to spend max on a psu,id spend more but budget dosent allow it lol:thumb:
The OCZ ZX 1000W is on sale - $139.99 after MIR.
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007657%20600014025&IsNodeId=1&name=901W%20-%201000W

That's really ridiculous value for a high quality 1kW unit. Much better than the Kingwin Lazer 1000W.
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