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Is my power supply high enough wattage?

post #1 of 11
11/12/12 at 1:06pm
Thread Starter 
Hi everyone I'm new here so please don't judge.
I'm having trouble with my rig I built last night. It boots installed all the programs. Went to run heaven after overclocking my xfired matrix 7970s and it just shuts off no blue screens or anything.
My system specs are:
Fx8350
Dual matrix 7970 xfire
Crosshair v formula z
H100 CPU cooler
4 2TB HDD's
1 128gb SSD
2 blue ray burner.

The power supply I'm using is an FSP Aurum Pro 1200w

Any help would be appreciated Thankyou
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post #2 of 11
11/12/12 at 1:10pm
You most definitely have more than enough power for xfire 7970's.

Although your psu could be faulty I suppose even though you have good brand of psu. Every company makes a few bad units. Does your computer shut off during anything else like 3dmark11 or furmar or while gaming?

If it doesn't then you probably have an unstable OC.
Edited by icehotshot - 11/12/12 at 1:14pm
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post #3 of 11
11/12/12 at 1:12pm
About 850W is enough, though a little more would be better for very severe overclocks, unrealistic synthetic loads. 1200W is way more than necessary; Aurum Pro is good and can handle the loads.

It's just your overclock.
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post #4 of 11
11/12/12 at 1:13pm
According to PSUCalc, you can find the thread for the download by searching the forums, you'd only need a 900W PSU. I think you should look at your overclock of the GPU's. I'm not fluent in the way the new cards overclock (power-slider and such).
Try running heaven while running stock clocks, this is to exclude any user-side errors that might be causing your system to reboot / shut off.
I'm not excluding the possibility that you might be sitting in with faulty hardware, it's just better to check your own doorstep before filing for RMA's smile.gif
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post #5 of 11
11/12/12 at 1:14pm
How much have you OCd your cards by?
Can you monitor your temps when you run heaven?
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post #6 of 11
11/12/12 at 1:27pm
Thread Starter 
Just ran heaven on max settings, it scored well but as soon as heaven finished it shut off. The same when I played sleeping dogs. It's really frustrating because they are amazing graphics cards. They are overclocked to 1200 on the core clock and 6800 on the memory. Tearing my hair out!!
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post #7 of 11
11/12/12 at 1:31pm
Listen to the above advice, do a benchmark with the cards at stock clocks, it's probably your overclock.
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post #8 of 11
11/12/12 at 1:44pm
Thread Starter 
On the asus crosshair v formula z there is a 4 pin molex on the motherboard next to the pcie slots. Am I supposed to plug those in? Sorry never has a rog board before.
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post #9 of 11
11/12/12 at 1:50pm
Quote:
The PEG slots are configured to allow up to three dual-slot graphics cards to be used in CrossFireX or SLI, with the second and third slots sharing 16 lanes dynamically; dual cards will run at 16x + 16x, triple cards will run at 16x + 8x + 8x. A 4-pin molex power input is located above the top PEG slot to help supply the 75W per PEG slot needed for each card.
Taken from: here. If I read that correctly, the molex is a support for Tri-Xfire solutions, due to 2nd and 3rd slot a shared lanes, I think.
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post #10 of 11
11/12/12 at 1:58pm
Thread Starter 
Yeah I think it may be my overclock I just ran the cards at standard for ten minutes and no shut offs. Thankyou all for the help it is very appreciated. Thankyou for a nice intro to the forums.
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