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What psu do i need?

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December 19, 2012 8:56:46 PM

I am going to need a new power supply to power my gtx 660ti's in 2 way sli and also do some overclockoing on my i5 3570k around 3.8-4.2 ghz ( im not really into overclocking much) but i was thinking around 800 watts but im not sure if that is too much or too less(guaranteed its too much), and another thing is price i dont want to spend a fortune on a psu. I dont need gold or platinum ratings maybe a bronze but anything that will get these additions to my computer working and will make my psu last long a while. Thanks.

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a c 1202 ) Power supply
December 19, 2012 10:34:46 PM

For a system using two GeForce GTX 660 Ti graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 650 Watt or greater power supply that has a combined +12 Volt continuous current rating of 38 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most important factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock you are trying to achieve.

The XFX 650W XXX Edition Semi Modular (Bronze) (P1-650X-XXB9), with its combined +12 Volt continuous current rating of 53 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two GeForce GTX 660 Ti in 2-way SLI mode.

XFX P1-650X-XXB9 650W ATX12V 2.2 & ESP12V 2.91 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply for $89.99 ($79.99 after $10.00 rebate card if purchased between dates 12/1/2012 and 12/31/2012.)
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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a c 307 ) Power supply
December 19, 2012 11:37:01 PM

Stratton said:
I am going to need a new power supply to power my gtx 660ti's in 2 way sli and also do some overclockoing on my i5 3570k around 3.8-4.2 ghz ( im not really into overclocking much) but i was thinking around 800 watts but im not sure if that is too much or too less(guaranteed its too much), and another thing is price i dont want to spend a fortune on a psu. I dont need gold or platinum ratings maybe a bronze but anything that will get these additions to my computer working and will make my psu last long a while. Thanks.


Hi - ko888 is correct the XFX 650 is more than enough to run those cards,
however, the XFX750 that dj linked (the 3rd one) is even less $$,
so in terms of price/value that is the way to go as they're is no harm
in having more than you need.

Tom
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a c 1202 ) Power supply
December 19, 2012 11:41:46 PM

I recommended the semi-modular because some people don't want all of those extra cables that aren't being used and will need to be hidden somewhere so that they don't interfere with case air flow.
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a c 307 ) Power supply
December 19, 2012 11:47:13 PM

ko888 said:
I recommended the semi-modular because some people don't want all of those extra cables that aren't being used and will need to be hidden somewhere so that they don't interfere with case air flow.



NP - I used to work in retail - so I always tend to look at price/value
relationship in just about everything.

NP = No problem

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