How much power will my new PC consume?

Erkan Mali · Feb 25, 2015

I know that the topic title is a bit meaningless but I just want to understand something. I am about to upgrade my PC. I will be replacing my standard PSU with Corsair 450W VS and get rid off Radeon 6450 and install GTX 750.

With 450W PSU, GTX 750 with i5 2300K, how much watt will it consume hourly? I am currently fine with my slim Xbox 360 which uses around 80W. If this new PC setup uses more than 200W then I will get PS4 instead.

bootcher · Feb 25, 2015

It depends on how much you use it. The psu doesn't always use it's full wattage, the pc consumes more if it's under full load compared to when it's idling, or doing some light work for example internet browsing.

You can calculate for yourself at some websites:
http://powersupplycalculator.net/
http://energyusecalculator.com/electricity_computer.htm

ko888 · Feb 25, 2015

That system, with a GeForce GTX 750, should be drawing less than 150 Watts from the wall outlet during gaming.

Zerk2012 · Feb 25, 2015

That 750 will only draw about 30 more watts than the 6450, it will run fine on most standard power supplies.

Erkan Mali · Feb 25, 2015

ko888 :

I am not an electrician so how come the calculations tell me that it needs to draw 285W power well you are suggesting it will be less than 150W?

Erkan Mali · Feb 25, 2015

Zerk2012 :

Yeah which 30W is not a big deal. I just don't want a hefty bill every month.

ko888 · Feb 25, 2015

Erkan Mali :

System power supply sizing and actual system power consumption are two different things.

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How much power will my new PC consume?

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