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Power supply for SLI setup

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August 4, 2009 1:18:05 AM

Hello, I'm new to the forum and look forward to helping out where I can. I've been working on/building computers for over ten years in my spare time. I've recently, however, ventured into something new which I'm not 100% knowledgeable about. I have a pny 9800gtx+ in my computer now and plan on running 2 in sli. I'm not sure if my current power supply can handle it or not.. its a coolermaster 600watt PS which is rated for sli, but these are large cards and some of them even require two 6 pin power connecters. So any advice on this would be much appreciated.. ty

More about : power supply sli setup

a b ) Power supply
August 4, 2009 2:18:20 AM

Which model? What are the rest of your specs?
August 4, 2009 2:23:39 AM

I have a p5ne-sli 650i MB, Q6600 quad core processor, 4gb (2gb x2) ddr2-800 gskill memory, 2x 120mm case fans, 1x 80mm processor fan, 1x 7200rpm sata HD, and the video card info reads as follows "PNY VCG98GTXPXPB GeForce 9800 GTX+ 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card ". On another note, I've just ran several different power supply calculators online which have given me results from 460-765 watts... so not too much help there.
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August 4, 2009 2:31:20 AM

Dude, what exactly is the model of the CM 600W PSU?
August 4, 2009 2:39:41 AM

the PS is a RP-600-PCAR
a b ) Power supply
August 4, 2009 2:45:46 AM

Get a 650TX or higher if you want to run dual 9800GTX's.....

And you will need to convert the molex to 6pin connectors due to that GPU uses 2 (each).

You can try with the 600w.... but no guarantees.....
August 4, 2009 2:52:14 AM

^ Agree. Get a 650tx corsair.
a b ) Power supply
August 4, 2009 12:22:57 PM

brkrotke60 said:
I have a p5ne-sli 650i MB, Q6600 quad core processor, 4gb (2gb x2) ddr2-800 gskill memory, 2x 120mm case fans, 1x 80mm processor fan, 1x 7200rpm sata HD, and the video card info reads as follows "PNY VCG98GTXPXPB GeForce 9800 GTX+ 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card ". On another note, I've just ran several different power supply calculators online which have given me results from 460-765 watts... so not too much help there.

I'm running more than that on a 620w PSU, you'll be fine.
a b ) Power supply
August 4, 2009 1:30:34 PM

If the 9800GTX+ that you're using is on the 55nm (single PCIe plug) then you'll be fine, if it the older 65nm (uses 2 PCIe plugs) then you should upgrade. The 55nm 9800GTX+ (some GTS250s) actually use less power then the old 8800GT. Toms once did a SBM article using a 400w Silverstone power supply along with a 750i motherboard and 2 8800GT in SLI and said it was a "brilliant idea"
a b ) Power supply
August 4, 2009 2:32:09 PM

The last 9800GTX+(55nm) that I had was dual 6 pin connectors and it was a power hog compared to the 65nm cards....

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August 4, 2009 2:35:42 PM

all GTX+ are 55nm, the GTX's were 65nm.
a b ) Power supply
August 4, 2009 2:47:07 PM

Message edited, thanks for correcting me "helloworld_98"
!