What Size PSU for 470s SLI+9800GTX PhysX?

jasonp12

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Sep 8, 2010
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I wanna know what kinda PSU ill need to run gtx 470s in sli with a 9800GTX+ in PhysX?

running an i7 930 for my CPU which i will be OCing
EVGA X58 SLI LE mobo

 
Asus has a power calculator for some of it's boards, listed under "utilities". It will give you a starting point for picking a ps. I always try to use a good brand, such as antec, seasonic, or corsair. There are several sli certified ps with the connectors you need for 2 or more video cards. Don't go just by the wattage. Cheap brands weigh less and don't give accurate information about performance under load. I've seen lightweight ps (2 or 2.5 lbs) die before my eyes in just days with moderate overclocking. Some go up in smoke. Better to get a good brand rated less in wattage than the cheap brands.
 
Well my 1st recommendation would be the Antec CP-850. Nothing passes it in performance according to jonnyguru and silentpcreview but unless ya got an Antec 1200, P183, P193 or DF series case, it's not gonna fit.

Here's alist I compiled about 8 months ago ....For comparison purposes , the list below contains performance ratings (10 scale) at jonnyguru.com / prices as per newegg on 02/21/2010 and ones w/ double asterisks (**) made it onto silentpcreview.com's Editor's Choice List meaning they excelled at both electronic and acoustic performance:


Antec SG-850 - 10.0 ($220) **
Antec CP-850 - 10.0 ($110) **
XFX 850W Black Edition 10.0 ($185)
Corsair HX850 850W - 10.0 ($180)

Antec TruePower Quattro (TPQ-850) - 9.5 ($150)
Corsair TX850 - 9.5 ($140)
Seasonic M12D 850W - 9.5 (NLA) **
NorthQ Giant Connector 850W - 9.5 (NFS)
Etasis ET850 - 9.5 (NLA)
Silverstone Zeus ST85ZF - 9.5 (NLA)

Enermax Revolution 85+ 850W - 9.0 ($250)

Thrmaltake Toughpower XT 850W - 8.5 ($216)
OCZ Z Series 850W - 8.5 ($200)

NorthQ Black Magic Flex 850W - 8.0 (NFS)
Coolmax CTG-850 - 8.0 (NFS)

SilverStone Decathlon DA850 - 7.5 ($230)
Enermax Galaxy DXX 850W EGX850EWL - 7.5 (NFS)

SilverStone Strider ST85F - 7.0

Silverstone Element ST85EF 850W - 6.0


NFS - Not For Sale / NLA = No Longer Available

If ya wanna check "will it do it", use the calculator here ..... the MoBo manufacturer ones seem to be a bit conservative
http://www.antec.outervision.com/
 

yes it should work fine unless you wanna clock the copper out of the pcb,max pull per 470 is 220watts so say 440watts for the cards just a big estimate since sli cuts power usage a bit, so 850-440=410 maybe~60 watts for the 9800gtx doing physx leaves you enough to run everything else