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

Last response: in Components
November 7, 2010 2:11:07 PM

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

a b ) Power supply
November 7, 2010 2:29:51 PM

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.
November 7, 2010 2:36:24 PM

agreed im obv gonna get a GOOD brand but like whats the MINIMUM wattage/amps id prob need?
Related resources
November 7, 2010 2:52:34 PM

HX1000 a good PSU for my needs?

or can i get away with something less or any other opinions?
a c 77 ) Power supply
November 7, 2010 3:18:51 PM

Corsair 1000HX is an option but I would go with this one instead...

Silverstone ST1200
a b ) Power supply
November 7, 2010 7:41:05 PM

The silverstone is way overpriced. Go with a corsair cmpsu-850SH for $109.99 after rebate at newegg. That's a great price and has plenty of power.
November 7, 2010 11:29:48 PM

850w is enough? u sure for 2x 470s OCd 930i7 and a 9800GTX+ as physx?
a b ) Power supply
November 7, 2010 11:39:25 PM

Yes. Plenty. It has 70 amps on the 12v rail, higher than 90% of the power supplies out there. And the price is great, plus the fan is 140mm. I use the same size fan in my ocz, and it's extremely quiet.
November 8, 2010 12:12:21 AM

would the XFX 850w Black 80+ Silver PSU do the trick?

i know 470s (and i got 2) take a LOT of juice and the 9800GTX+ takes a fair amount to for an older card.....
November 8, 2010 12:17:42 AM

i dont think 70amp on the 12v rail is enough..........2x gtx 470s take 58amps leaving only 12amps for the 9800GTX+....
a b ) Power supply
November 8, 2010 12:35:54 AM

just dont run the 9800gtx as there is no point, simple.
November 8, 2010 12:50:41 AM

well for now im running a 470 and a 9800GTX dont have the 2nd 470 yet i wanna get it
November 8, 2010 12:51:09 AM

and empress i cant afford the ax 1200 budget wanna keep as low as possible
a c 91 ) Power supply
November 8, 2010 12:58:51 AM

jasonp12 said:
and empress i cant afford the ax 1200 budget wanna keep as low as possible

Like i said, a good 850W unit will do it for you.. If you still need more and can do without the unit being modular, then check out the Corsair TX 950..
a c 124 ) Power supply
November 8, 2010 1:16:46 AM

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 / prices as per newegg on 02/21/2010 and ones w/ double asterisks (**) made it onto'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
a b ) Power supply
November 8, 2010 4:20:51 AM

If you want 850 the xfx is the best for the price if you want 1kw get the abs sl1050
November 8, 2010 11:52:46 AM

well my point 850 enough for 2x 470s and a 9800GTX in physx?
a b ) Power supply
November 8, 2010 2:34:50 PM

jasonp12 said:
well my point 850 enough for 2x 470s and a 9800GTX in physx?

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