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1000W PSU can't power SLI

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  • SLI
  • Components
Last response: in Components
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December 8, 2013 6:52:41 AM

I posted in Systems thread where I should have posted here. Apologies.


My Problem = Furmark passes on single GPU mode but shuts down computer in SLI mode instantly.

The rampage motherboard can allow you to test each GPU by switching off individual slots which means you don't have to take out the cards.

So I have tested each card individually on Furmark and they pass. Only in SLI mode the computer always shuts off.

I have stress tested the CPU with prime95 and has passed. I have even tried 3.2GHZ OC.
I have memory tested the ram which took 6 hours and it passed. All ram is same latency.

I am using up to date Nvidia drivers.

I have killowatt meter reader. The results were:

I7 @ 4.2ghz = 330 watts
+ 1 x GTX480 = 220 watts = 550 Watts

I don't know reading of all system full wack with SLI because it crashes too quick with Furmark.

Appreciate help and response.

System Specs:
I7 @ 4.2GHZ
6GB Corsair ram (no over clock)
Rampage Extreme 3
2 X GTX480 SLI (no overclock)
All on water cooling so Temps are really good!
ATX Xilence Modular 1000W PSU QUAD SLI ready 80 Bronze.

More about : 1000w psu power sli

December 8, 2013 6:56:46 AM

The power supply isn't a good quality unit.
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December 8, 2013 7:22:50 AM

SR-71 Blackbird said:
The power supply isn't a good quality unit.


Simple as that? Gutting. I bought it because of the cool looks and power ratings. Only a couple of years old.

Has six 12Volt rails:

12(v1) = 20amps
12(v2) = 20amps
12(v3) = 33amps
12(v4) = 20amps
12(v5) = 20amps
12(v6) = 33amps


Is it worth buying a PSU ATX tester for around £15.00 Ebay?

On HWMonitor program it shows: 12v@ 11.71v, 3.3v @ 3.12v, 5v @ 4.94v


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December 8, 2013 7:25:33 AM

No , just stating that the power supply isn't a great choice.
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December 8, 2013 7:38:07 AM

SR-71 Blackbird said:
No , just stating that the power supply isn't a great choice.


Thank you very much blackbird. I appreciate that.

Can anyone recommend a PSU that has a red fan colour.

I want to match it to my computer.



p.s old pic. Now has sli.
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