PSU for 2x 8800gts (G92) SLI - Overclock.net

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post #1 of 8 Old 03-19-2008, 03:56 AM - Thread Starter
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My builds just 2 HDD's and one dvd burner with the two GPU's.

How many watts should i get? should i play it safe with a 750w or is a good 650w plenty?

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post #2 of 8 Old 03-19-2008, 04:20 AM
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What CPU are you running? Also are you planning on overclocking your GPU's?
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post #3 of 8 Old 03-19-2008, 04:22 AM
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go 750w and give yourself some headroom although a solid branded 650w would suffice, i run my sig rig on a coolermaster 520w with no probs as quality is better than quantity but i still plan on upgrading to give myself some headroom.

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post #4 of 8 Old 03-19-2008, 04:49 AM
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jaubeeres you really are pushing it. 750W would do you good and giv eyou some headroom especially the higher quality ones with only one 12v rail such as

http://www.newegg.com/Product/Produc...6017&Tpk=DA750 DA750

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post #5 of 8 Old 03-19-2008, 05:13 AM
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A loaded rig with 2x GTS requries 500W PSU with 30A on 12v rails. With that says, A good 550W PSU should be fine. So, depending on your budget and future upgrade, $70 Corsair 550VX, $100 Corsair 650 or $150 Silverstone DA650.
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post #6 of 8 Old 03-19-2008, 05:31 AM
 
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Yea the Corsair 550VX or 650TX are good options, but there's also a good deal on the OCZ GameXstream 700W selling for $95 after MIR.

All three would work just fine. The Corsairs come with a 5 year warranty and a strong single rail (I prefer single rail). The OCZ comes with a 3 year warranty and 4 rails. The Corsair 550 only has 1 PCIe 8-pin connector and 1 PCIe 6 pin connector, which is fine for your current setup, but if you ever upgraded to SLI a pair of video cards that each required an 8-pin connector you wouldn't be able to do so (and it would also be pushing the 550W capacity). So the 650TX and OCZ 700W would future proof you a bit more, but the 550VX is plenty for your current setup.

Also, make sure you get your Corsairs off buy.com if you choose Corsair; they're much cheaper there than newegg.

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post #7 of 8 Old 03-19-2008, 05:35 AM
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I'm running my sig rig with a 60$ 600W PSU

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post #8 of 8 Old 03-19-2008, 04:43 PM - Thread Starter
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i'm gonna be using a q6600 with a evga 780i mobo.

whats the difference between a single rail and multiple?

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