Could it be my PSU?

ZeusGamer · Aug 12, 2014

Hi guys... today, I've got a new GPU and it's the Asus R9 280x and I've crossfired it with another.

Once gaming, it's fine for until 5 minutes later, the WHOLE system just automatically shuts down out of no where. Could it be that my PSU is insufficient for these two graphics cards? I've got the EVGA SuperNOVA NEX750B1

Please let me, thanks in advanced guys!

Also, if there are any fixes, do you think I could underclock my card so that they won't peak the power supply?

I know for a fact that I'll be getting the EVGA SuperNOVA 850G2 in the near future. But for the meantime, I just want to know if this would fix this problem!

Dark Lord of Tech · Aug 12, 2014

A 280X should have at least 850w , and yes your 750 isn't sufficient to run 2 cards,that EVGA is very poor and unstable , the 850w is the best on the market.

Replacing the poor and underpowered PSU and your problem should be resolved.

The EVGA 850w G2 is the perfect solution.

ZeusGamer · Aug 12, 2014

I knew that it was the power supply itself. I'll probably turn off crossfire for now until I can get a new power supply sufficient enough to power these beasts. Anyways, thanks a lot for that information SR-71 Blackbird

Dark Lord of Tech · Aug 12, 2014

Your welcome , nice choice on the new supply.

ZeusGamer · Aug 12, 2014

You think so? Do you think I should go for more or should the 850G2 suffice?

Dark Lord of Tech · Aug 12, 2014

850w will suffice , I have a 1000w EVGA P2 running my 2 - 770's

ZeusGamer · Aug 12, 2014

So the 1000G2 and the 1000P2 are almost identical other than the efficiency right? How's the fans on these power supplies? I've got the B1 and the fan sucks. Also the capacitors buzz almost all the time when under load.

Dark Lord of Tech · Aug 12, 2014

The Fans are quiet and can barely here it.

The B2 , G2 , P2 , and soon to be T2 are the good ones.

So the 1000G2 and the 1000P2 are almost identical other than the efficiency right? < YES

Here's my P2:

Schneizel · Aug 12, 2014

Linus SLIed two GTX 780s with a 700w psu so I would imagine that this wouldn't be the problem, but it might be depending on the quality of your PSU.In the mean time, underclocking will help here. I say you should underclock your cpu and gpu a lot and check to see if it's still causing problems.If it is, the problem is not the psu (at least not the wattage of the psu).

Edit: You don't need 1000w.That wattage is reserved for 3-Way SLI/Crossfire and there is absolutely no way a 2-Way SLI/Crossfire will utilize it.

Dark Lord of Tech · Aug 12, 2014

The power supply he has is known to be unstable , it's not one of the elite EVGA power supplies made by SuperFlower.

ZeusGamer · Aug 12, 2014

I'll most likely end up getting the 1000G2 then.

Dark Lord of Tech · Aug 12, 2014

Good choice , it's a killer power supply .

Schneizel · Aug 12, 2014

Out of curiosity, why do you always embolden your words?

Dark Lord of Tech · Aug 12, 2014

Because I was born blind in my left eye , and I have lost vision in my right eye because of diabetes.

Makes it easier for me to read.

Schneizel · Aug 12, 2014

Oh,sorry for asking.

Dark Lord of Tech · Aug 12, 2014

It's ok , I get asked the question once in awhile.

ZeusGamer · Aug 12, 2014

Just ordered the 1000G2. Thanks for the help SR-71!

Dark Lord of Tech · Aug 12, 2014

Anytime , glad to assist , thanks for posting , much appreciated.

Could it be my PSU?

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