how do I know what psu to get?

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scottydot123

scottydot123

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Aug 14, 2014
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Hello
I have recently wondered do I just need to look at the watts on a psu or is there anything else but is the corsair 750w modular compatible with the i7 4790k and the msi gtx 970.Because I've been getting like 80 degrees on my cpu and gpu atm.
anyway thanks.
 
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DonkeyOatie
A basic system needs around 100W of power for CPU, motherboards, and drives. Your GPU adds another 150 W to that. You also have an overclockable i7, which I assume that you plan to overclock, and the GTX970 is likely overclocked somewhat when you buy it, and you may overclock it more yourself. Assuming normal overclocking and use for normal gaming, I would another 150W to handle maximum loads, for a total of 400W. A PSU is most efficient at about 70% of it's rated load, so that means you need a PSU of about 550W. Thus, 750W is plenty, with enough in reserve for a second GTX970 if your motherboard can handle SLI.

Corsair makes a wide range of products from excellent (AX and HX) down to builder budget (CX). No matter what the...
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DonkeyOatie

DonkeyOatie

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Sep 16, 2014
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A basic system needs around 100W of power for CPU, motherboards, and drives. Your GPU adds another 150 W to that. You also have an overclockable i7, which I assume that you plan to overclock, and the GTX970 is likely overclocked somewhat when you buy it, and you may overclock it more yourself. Assuming normal overclocking and use for normal gaming, I would another 150W to handle maximum loads, for a total of 400W. A PSU is most efficient at about 70% of it's rated load, so that means you need a PSU of about 550W. Thus, 750W is plenty, with enough in reserve for a second GTX970 if your motherboard can handle SLI.

Corsair makes a wide range of products from excellent (AX and HX) down to builder budget (CX). No matter what the brand, I would want a Tier 1 or Tier 2 PSU from the list above for this build. If you post a link to your buying source we can help you choose a good supply in your budget.
 
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