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iDeekz

Sniper Regiment

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15th February 2008

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#1 10 years ago

What kind of wattage is needed for SLI preferably using two 8800Gt's 512mb?




*Daedalus

A Phoenix from the ashes

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18th April 2006

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#2 10 years ago

Probably somewhere around the 600W mark, to be safe. (Very rough guess.)




Oblivious

I tawt I taw a puddy tat...

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30th December 2002

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#3 10 years ago

Link: NVIDIA SLI Zone - Power Supplies

Scroll down to the dual 8800GTS/8800GT/7950GX2 and then click on the dropdown menu for a list of approved power supplies for that setup.




kow_ciller

Gettin' hardware chilly

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16th June 2004

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#4 10 years ago

You'll be fine with a quality 500w PSU. Such as a Corsair HX520.




Oblivious

I tawt I taw a puddy tat...

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30th December 2002

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#5 10 years ago
kow_ciller;4595414You'll be fine with a quality 500w PSU. Such as a Corsair HX520.

For two 8800GT's?

That's enough for one card, maybe, depending on the +12v amperage. Lowest wattage I saw from a scan of the nvidia list is a 650w PSU, most were 750w and above.




C38368

...burning angel wings to dust

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14th February 2004

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#6 10 years ago

8800GT is only rated to draw ~140W at peak consumption. Two of these on a 500W effective PSU leaves at least 120W of overhead, and practical (read: real-world, with a Kill-a-Watt) tests show that a system with a single card draws well under 300W at full load.

A quality 500W unit is perfectly fine for that card. What actually works and what nVIDIA gives the green light to jack the price up on are... not always the same.




Babeman

A dog+sombrero=awesome.

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11th August 2008

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#7 10 years ago

C38368 is right. I have a 8800 GT OC and I only have a 305w PSU, have had no problems so far. Am also playing games like Crysis Warhead, The Witcher, Oblivion, Medal of Honor Airborne, at max and have had nothing go wrong. But I am going to be upgrading it soon just to be safe :)




Oblivious

I tawt I taw a puddy tat...

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30th December 2002

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#8 10 years ago

C38368;45976328800GT is only rated to draw ~140W at peak consumption. Two of these on a 500W effective PSU leaves at least 120W of overhead, and practical (read: real-world, with a Kill-a-Watt) tests show that a system with a single card draws well under 300W at full load.

A quality 500W unit is perfectly fine for that card. What actually works and what nVIDIA gives the green light to jack the price up on are... not always the same.

I don't doubt this is correct, but it does beg the question, why don't more folks do this then? (use a 500w PSU for SLI) It may have to do with the other power consideration, the +12v amperage requirements of two cards, something that may be inadequate on a 500w unit.

Personally, I think SLI is (typically) a waste of time anyways, but that's another topic entirely. :)




Bs|Archaon

I would die without GF

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15th March 2006

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#9 10 years ago
Oblivious;4598204I don't doubt this is correct, but it does beg the question, why don't more folks do this then? (use a 500w PSU for SLI)

One of four reasons as far as I'm concerned:

1) Because they're told to by people that don't know what they're talking about.

2) They've bought a high-end machine with one in, obviously a company can charge more for a product with a higher rated PSU that the system doesn't need and make more money with no extra effort.

3) They do it because nVidia says so, even though nVidia's own specs say that massive PSUs are not needed.

4) They know they don't need it but buy a bigger one for future proofing purposes so that it's less likely to need replacing (one PSU is cheaper than two PSUs, basically).




kow_ciller

Gettin' hardware chilly

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16th June 2004

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#10 10 years ago

Oblivious;4595817For two 8800GT's?

That's enough for one card, maybe, depending on the +12v amperage. Lowest wattage I saw from a scan of the nvidia list is a 650w PSU, most were 750w and above.

Yeah, I've seen two 4850s, an overclocked q9650, and a few hard drives on one going strong. Two 8800gt's are nothing.