PSU Wattage Help

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Roger Narq

Roger Narq

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Jul 24, 2013
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I don't know what wattage I should get. I will be starting with one GPU and later upgrading into a 2 way SLI. Please help, First time with SLI/Crossfire so I don't know how much watts I should have. And I know SLI is for GeForce and Crossfire for Radeon. :)

Mobo: http://www.newegg.com/Product/Product.aspx?Item=N82E16813128514
CPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16819103960
RAM: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231314
HDD: http://www.newegg.com/Product/Product.aspx?Item=N82E16822236339
Disk Drive: http://www.newegg.com/Product/Product.aspx?Item=N82E16827135204

I have a Monitor, Mouse, and Keyboard that would be minor for the wattage calculation.

GPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16814130909
 
Solution
ko888
For a system using two GeForce GTX 650 Ti BOOST graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 600 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 33 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

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

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum...
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4745454b

4745454b

Titan
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Apr 29, 2006
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The 650TI boost only has one 6pin PCIe plug. This means its max power draw has to be 150W or less. Two of them would consume 300W or less. Add in a 125W CPU and the rest of the system and even in SLI you are looking at less then 500W. As above, 650W is fine, good 550-600W will work as well. Get the 650W if you will be OCing the CPU for sure. Otherwise any quality PSU with two 6pin PCIe plugs that is rated at 550W+ will do fine.
 
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Roger Narq

Roger Narq

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Jul 24, 2013
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Can you recommend me a PSU that is 600-650 Watts?
 
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ko888

ko888

Titan
Feb 18, 2009
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For a system using two GeForce GTX 650 Ti BOOST graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 600 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 33 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

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

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum 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 being attempted.
 
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