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Can i sli two gtx 660 or gtx 660 ti with this psu?

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  • Power Supplies
  • Gtx
  • SLI
  • Components
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September 16, 2012 7:28:20 AM

Can i sli two of either gtx 660 or 660 ti with the ocz modxtream pro 700w power supply?

More about : sli gtx 660 gtx 660 psu

a b ) Power supply
September 16, 2012 9:45:41 AM

For two 660 or 660ti a 700W PSU is a reasonable minimum.
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a c 87 ) Power supply
September 16, 2012 1:02:51 PM

The ModXStream Pro 700W has two 25A (300W) +12V rails. And two PCIe connectors. These PCIe connectors are on the same rail as the SATA and 4pin peripheral (molex) connectors.
Most GTX 660s require only one PCIe connector. Combined with a maximum TDP of 140W, this means that on max GPU load you would have ~20W left to run any HDDs and fans you have connected. So, yes it is possible.

GTX 660 Tis on the other hand require two PCIe connectors each (total of 4 for GTX 660 Ti SLI) and have a maximum TDP of 150W, which means you would be overloading it's +12V2 rail on maximum GPU load.

If you've already got the OCZ MXSP 700W then you could try it. However if you are looking to buy a PSU then I would suggest something else, with the required cabling and a better +12V rail layout.
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a b ) Power supply
September 16, 2012 1:07:49 PM

Silvune said:
The ModXStream Pro 700W has two 25A (300W) +12V rails. And two PCIe connectors. These PCIe connectors are on the same rail as the SATA and 4pin peripheral (molex) connectors.
Most GTX 660s require only one PCIe connector. Combined with a maximum TDP of 140W, this means that on max GPU load you would have ~20W left to run any HDDs and fans you have connected. So, yes it is possible.

GTX 660 Tis on the other hand require two PCIe connectors each (total of 4 for GTX 660 Ti SLI) and have a maximum TDP of 150W, which means you would be overloading it's +12V2 rail on maximum GPU load.

If you've already got the OCZ MXSP 700W then you could try it. However if you are looking to buy a PSU then I would suggest something else, with the required cabling and a better +12V rail layout.

I'm running two 170w cards on a 620w PSU so I think you are being more than a tad pessimistic on what is required for a pair of 150w cards.
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September 16, 2012 1:08:47 PM

id rather reccomend corsair's freshly launched cx750w its 80+ bronze and sli n cf certified and 750w is more then enough for two 660ti or 660 me my self planning on making my first build on a cx750 later with two 7770.
and it's a lil bit cheaper than ocz. or the same price.
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a c 87 ) Power supply
September 16, 2012 1:48:24 PM

Mousemonkey said:
I'm running two 170w cards on a 620w PSU so I think you are being more than a tad pessimistic on what is required for a pair of 150w cards.

I'm being pessimistic about the ModXStream Pro 700W PSU. There are loads of 650W PSUs, even multi-rail 650W PSUs that I would trust with an SLI system before the MXSP 700W.
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a c 243 ) Power supply
September 16, 2012 3:12:36 PM

computernoob29 said:
Can i sli two of either gtx 660 or 660 ti with the ocz modxtream pro 700w power supply?

Playing Skyrim on on a single 660Ti in an I7-3820 system, with a ~90% efficient power supply



http://techreport.com/review/23419/nvidia-geforce-gtx-6...

246w x .9 =~222w load
222 + 150* ( TDP ) = 372w ( * When running SLI, the secondary card doesn't draw as much power as the primary so that figure is high )

Not all of that power would be drawn off the 12v, modern systems still use 3.3v and 5v power ( figure around 40w or more for a dual card system, depending on peripherals ) The MXSP doesn't use DC to DC conversion
Also, it won't all come from 1 rail, graphics cards get some of thier power from the pcie slot ( The cpu and motherboard connectors of the MXSP are on 1 of the 2 rails )
Some games will draw less, some a bit more, can't see any problem using either card in SLI
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September 20, 2012 5:22:54 PM

Best answer selected by computernoob29.
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a b ) Power supply
September 20, 2012 5:35:21 PM

This topic has been closed by Mousemonkey
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