Advice on PSU for my Graphiccard

[sam_r9]

Hi jonnyguru

I'm going for a new computer.

I bought a 1GB evga-GeForce 7950 GX2

Requirements
Minimum of a 450 Watt power supply.
(Minimum recommended power supply with +12 Volt current rating of 28 Amp Amps.)
Minimum 650 Watt for SLI mode system.
(Minimum recommended power supply with +12 Volt current rating of 36 Amp Amps.)
An available 6 pin PCI-E power connector (hard drive power dongle to PCI-E 6 pin adapter included with card)



Now my big problem is, I want a great Power Suply. What should I get?
I've been looking on you're reviews and the Corsair 620W seems really cool. But what's your advice?

Thanks

[jonnyGURU]

There's lots of good choices for someone using a single 7950. Your choices aren't as limited as SLI users.

I don't typically come out and make suggestions, because lots of people have different priorities: modular, "FlexForce" cables, low noise, high efficiency, etc.

You current consideration is a good one for your card.

[burebista]

7950GX2 needs 10-12A (http://www.xbitlabs.com/articles/video/display/power-noise_3.html) from +12V rail.
Unless you plan for a SLI, any good brand 400-430W should be enough for you, but if you want some safety margins I'd say a Seasonic M-12 500: single rail, 80+ certified, deadly quiet. Or Seasonic S12 Energy Plus 550.

[sam_r9]

Thanks guys for the fast answear.

I like the suggestion about Seasonic S12 Energy Plus 550.

But will 550W be enough?

My comp:

Inte core duo 2 e6660
Asus P5N32-SLI Premium OR ASUS P5W DH DELUXE
Corsair TWINX2X2048 6400C4
Western digital 36.7 10 000rpm
and 3 other HD = 700gb.

And 5 coolers, so will it be enough?

Btw, as you can see I havn't decided which motherboard I should choose, what would you go for?
Those two motherbards are tipicaly the same, just the chip is different.

Any suggestion?

[burebista]

I like the suggestion about Seasonic S12 Energy Plus 550.

But will 550W be enough?
Review (http://www.silentpcreview.com/article656-page1.html).
For a high end, blazing performance, dual-graphics, overclocked monster of a system, we know of no quieter power supply than the Energy Plus. Acoustically, the Energy Plus has surpassed our expectations of what is possible from a quiet power supply and set a new standard. With a fan that doesn't begin to increase in speed until 250W output, it will take a concerted effort to force the Energy Plus to become noisy — a nice change from the need to put effort into preventing added noise.
41A on +12V are plenty even for a 7950GX2 SLI.

And about MB, it's mandatory i975? Because on i965 you should have a higher FSB. ;)
Asus P5W DH Deluxe - 400-420 FSB, very hot NB.
With i965 I saw good results with ASUS P5B Deluxe WiFi/AP (520 (http://valid.x86-secret.com/show_oc?id=119922) FSB), or with ABIT AB9/Pro.

[davidhammock200]

I recommend a Corsair 520W for a single 7950 GX2 & the Corsair 620W for dual 7950 GX2's. ;)