PSU for CrossFire

izzop · 17 May 2014 at 23:16

Hi,

Need a little advice on my current PSU and if it's man enough to power 2 7950 cards in CrossFire?

I currently have a Corsair HX 650W ATX Modular SLI Compliant Power Supply running just the one card. Would I get away without having to upgrade the PSU to run two cards?

If not, would an 850 be more than enough?

Thanks & Regards

dacads · 17 May 2014 at 23:29

Won't you need 4 PCIe connectors I believe that PSU only has two?

lee32uk · 17 May 2014 at 23:36

There are two versions of the HX650W according to the link below. The Bronze rated has 4 pci-e connectors, whereas the gold rated has 2.

http://www.realhardtechx.com/index_archivos/Page447.htm

You might get away with it if you have the Bronze version. The recommended psu is around 700W.

izzop · 17 May 2014 at 23:57

Thanks for the replies.

According to the model number of the one I have (CMPSU-650HX) it has 4 PCI Connectors.

So it could manage it, although it might be pushing it.... Think I might upgrade to play on the safe side.

Cheers.

postmanfw · 18 May 2014 at 00:29

Are you going for the ax850/860? if so avoid the ax860i as few bad reports about it.

Got a ax850 in main rig and ax750 in 2nd rig...great psu very quiet and 7 year warranty.

850w prob would be best for two 7950s just to give you some headroom for overclocking them

Jony27 · 18 May 2014 at 00:33

Have a HX750w in my sig, with both gpus and cpu overclocked, still running fine

izzop · 18 May 2014 at 12:23

Hi,

I was thinking of the AX 860W.

Regards

pastymuncher · 18 May 2014 at 12:45

If it were me i would be going with the EVGA Supernova G2 850w. It's a fully modular, Gold rated unit built by superflower and has a industry leading 10 year warranty. It's also a hell of a lot cheaper than the AX860.

DaleTheWhale · 18 May 2014 at 13:04

pastymuncher said:
If it were me i would be going with the EVGA Supernova G2 850w. It's a fully modular, Gold rated unit built by superflower and has a industry leading 10 year warranty. It's also a hell of a lot cheaper than the AX860.

100% this, the AX860 is fantastic, but the EVGA is an unmissable deal.

izzop · 18 May 2014 at 13:12

Thanks for the heads up guys.

Looks like the EVGA it'll be, and agree it's a lot better price wise.

Regards

FloppyPoppy · 18 May 2014 at 13:18

Wow, im glad i took a read of this, i posted the other day with something similar

I think i will be going for a EVGA supernova G2 1000W, same price as a ax860 i found but will be a nice little bit of head room

Kind regards

pastymuncher · 18 May 2014 at 14:06

The P2 (platinum) you mean? The 1000w G2 is only £139.99. Both are fantastic units that yopu can't really go wrong with. Jonnyguru reviewed both and gave the 1000w G2 9.5 out of 10 (would have been higher but he deemed the pci-e cables too long and deducted half a point) and the 1000w P2 9.7 out of 10.

Incidently, he gave the Supernova G2 850w a whopping 9.9 out of 10!!

FloppyPoppy · 18 May 2014 at 14:34

Yeah! Truthfully i was amazed when i saw that superflower made the supernova above, i need quite long cables, 900D

FloppyPoppy · 18 May 2014 at 14:42

I have to say, my only issue with the psu is the red pic-e cables

dacads · 18 May 2014 at 16:09

pastymuncher said:
The P2 (platinum) you mean? The 1000w G2 is only £139.99. Both are fantastic units that yopu can't really go wrong with. Jonnyguru reviewed both and gave the 1000w G2 9.5 out of 10 (would have been higher but he deemed the pci-e cables too long and deducted half a point) and the 1000w P2 9.7 out of 10.

Incidently, he gave the Supernova G2 850w a whopping 9.9 out of 10!!

witwoo these numbers are fascinating!

pastymuncher · 18 May 2014 at 19:00

If you are being sarcastic then the numbers mean a lot seeing as it's Jonnyguru's OklahomaWolf, probably the best PSU reviewer on the internet, that gave those scores.

If you are not being sarcastic, although the winking smiley would suggest you are, then apologies for the above.