Recommended PSU for 7900GTX SLI -

[imipenem]

Building an SLI rig using 7900GTX and AMD X2 (4200 or 4400)cpu. Looking at 550-600W PSUs, does anyone have a brand preference? Seasonic, Antec, Thermaltake - which would you use?

 

[bjc112]

Seasonic, Enermax, Antec, OCZ..

No particular order.

 

[imported_michaelpatrick33]

I have the Seasonic 600 for my evga 7900GTX overclocked(s) so I am interested to see how it takes them and my X2.

 

[Extelleron]

I'd recommend something like this, an FSP 600W PSU: ($139)
http://www.newegg.com/Product/Product.asp?Item=N82E16817104014

 

[CP5670]

This FSP one should work well as it has a single large 12V line, which seems to work better for dual card setups in some cases:
http://www.newegg.com/Product/Product.asp?Item=N82E16817103517

 

[moonboy403]

you guys forgot the almighty pc power and cooling 510

 

[RussianSensation]

OCZ PowerStream OCZ520ADJSLI 520W - $115 after MIR
Don't let the 520 Watt rating deter you. This will blow most 600 watt PSUs out of the water. It has adjustable rails for better regulation and is very quiet.

ENERMAX EG651P-VE FM(24P) 550W - $109
This has 36A on 12V rail and substantially better ratings for 3.3 and 5V rails than the Forton. Although marketing can't always be trusted, Enermax is a good brand and chances are it's as powerful as the specs say. I am not sure if it has SATA connectors though.

SeaSonic S12-500 500W - $130
One of the best PSUs. Seasonic doesn't work well with DFI mobos, but latest revisions of this psu should have fixed any problems. The 600 watt version of this model is somewhat louder.

I think PC Power & Cooling 510 is not worth 2x the price of some of these units.

 

[nib95]

I have an Enermax 500w Liberty.

Do you guys think it will be enough to power two OC'd 7900 GT's in SLI and an Opteron 170 @ 2.7ghz, DFI lanparty SLI-DR eXpert and god knows how many fans?
I'm worried that it might not be enough. Then again it is dual rail at 22a each, which as I remember is more then the Seasonic PSU's.

What do you guys think?

 

[RussianSensation]

nib95, the 620W version with same dual 22A specs seems to be able to cope with load fairly well. LINK So I doubt that yours wont hold up.

Again, specs are not everything. You did mention that Seasonic has lower specs but its the quality of components that matters. Seasonic S12-500 is bulletproof at load

 

[imipenem]

How bout the Antec NeoHE 550?

 

[RussianSensation]

Originally posted by: imipenem
How bout the Antec NeoHE 550?

Stability isn't as good as other PSUs. Link
But it does have 3 12V @ 18A rails. It's 3.3V rail seems low at 24A. Personally from PSUs I've noticed, the rail that is most sensitive tends to be 3.3V. If it dips below 3.20V, random reboots are all over the place. 12V rail can dip as low at 11.45 and the system can be stable. So I'd strongly consider something with a more powerful 3.3V.

 

[nippyjun]

How about the antec tru 550 for dual 7900gtx's?

 

[RussianSensation]

Good PSU thread

Good values:

Enermax 535W Whisper II EG565P-VE FMA V2.01 $83: (nVidia SLI Certified)

Antec TRUEPOWERII TPII-550 550W: $87 > 3yr warranty nVidia SLi certified
+3.3V@32A, +5V@40A, +12V1@19A, +12V2@19A, -12V@1A, +5VSB@2A

Antec TRUE 550W EPS12V (Single Rail +12V@36A) - $89
Essentially same thing as the Enermax 550 watt i linked earlier (I recall Antec and Enermax are basically the same company's products).

EDIT: Found a good sale on Seasonic S12-600
$127.50
This is actually a NEW VERSION with quieter fan. 3-Year Warranty. S12-430/500/600 models have 8P connector for Dual CPU motherboards as well as standard ATX 12V (4P) connector and also support 2 x SLI PCI-E Video with 6-pin connectors