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Power supply calculator

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June 24, 2014 8:01:00 PM

I am currently building a gaming PC. I bought a 550W corsair power supply I'm wondering if it will be big enough.
I have: nvidia GeForce gtx 780
Intel i7 4790 3.6GHz
2 sticks ddr3 ram
3 140mm fans
1 7200 rpm sata hdd
1 blu ray drive
I am also thinking of adding a liquid CPU cooler in the future as well as a ssd.
Asus gave me a 700W recommendation but extreme said 514W.
I don't want my system to be under powered so if anyone with experience would know if this is enough that would be great.
a b 4 Gaming
a b ) Power supply
June 24, 2014 8:06:11 PM

no your 550w is under sized on the 12v line by 100w. nvidia as a min recommends a 650w power supply for those gpus. for safty get a good 750-850w unit.
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a b 4 Gaming
a c 291 ) Power supply
June 24, 2014 8:39:38 PM

Halo5208 said:
I am currently building a gaming PC. I bought a 550W corsair power supply I'm wondering if it will be big enough.
I have: nvidia GeForce gtx 780
Intel i7 4790 3.6GHz
2 sticks ddr3 ram
3 140mm fans
1 7200 rpm sata hdd
1 blu ray drive
I am also thinking of adding a liquid CPU cooler in the future as well as a ssd.
Asus gave me a 700W recommendation but extreme said 514W.
I don't want my system to be under powered so if anyone with experience would know if this is enough that would be great.


Hi - what model # is the Corsair 550 you have? There are a couple that have enough +12v amps to run a sys with a gtx780. GPU mfgs routinely overstate PSU wattage necessary to account for older designs that
do not have enough power on the +12v rail(s) or those POS PSU's that lie & exaggerate their power specs.

Altho a good quality 550w unit (with at least 42 +12v amps and Haswell ready) will run that system, I
would opt for a good quality 650w unit.


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a c 412 4 Gaming
a c 1995 ) Power supply
June 24, 2014 8:43:08 PM

If it's the RM550 it has the power to run your specs with the 780.
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June 24, 2014 9:22:56 PM

CORSAIR RM Series RM550 550W ATX12V v2.31 and EPS 2.92 80 PLUS GOLD Certified Full Modular Active PFC Power Supply

This is what I bought
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a b ) Power supply
June 25, 2014 1:58:51 AM

It should be all good according to what SR-71 said.
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