Crossfire 7970 HELP!

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1

I am planing to upgrade my rig with one more 7970

This is the rig after the upgrade: http://pcpartpicker.com/p/2lK2T

Is the PSU powerfull enought for the system og do I need to get more power?

Thanks for the help :)

2

Yes, I am running 2 7950s on a 750watt, no problem you are fine.

3

I am curently runing one 7970 vapor-x and a 750 w PSU and I can't overclock my GPU!

4

When you crossfire you will not need too. Which software are you using to overclock?

5

It looks like you would PROBABLY be 'OK' for power, but I wouldn't chance it. I would look at an 850w+. It's better to get a bit more than you need with a good efficiency (80+ Bronze at LEAST) IMO. 

I'm running 8350 OC'd and 2 7970's with mild OC and I use a 1000w 80+ Gold.

6

The partspicker link says he will go 1000watt gold after upgrade thus my "hell ya" reply.

7

Sounds like you have a poor overclocking card.

8

Im crossfiring a 280x with a 7950 (yes. 7950). And im on a 650Watt. youll be fine.

9

Thanks everyone for the help :) I know what to do now