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Power Supply Wattage for Gaming Rig

  • Gaming
  • Power Supplies
  • Components
Last response: in Components
May 25, 2014 5:39:23 AM

Sup, friendly neighborhood experts.

I'm building myself a ~1100$ gaming rig, and outlined the following:


Graphics Card:


2x4GB Kingston DDR3 1600mhz sticks

1TB, 36MB cache, 7200 rpm SATA3

And now I'd like to ask people who understand power supplies which wattage I will need for the above setup, and which brands to look for and avoid. I might get a second card for crossfire once I gather some more money for it.

EDIT: Would this be a good choice?

Thank you in advance for your time!

More about : power supply wattage gaming rig

May 25, 2014 6:46:18 AM

Hey there!
The component in your pc that sucks alot of power is the graphics card! So for your rig, the 650W psu will fit just perfect :)  I will recommend Corsair and Cooler Master!

BUT if you are going crossfire with this, a 750W will be the way to go!
a b 4 Gaming
a b ) Power supply
May 25, 2014 6:56:01 AM

For dual cards you want at least an 750w PSU.

Seasonic is the best brand. Antec and XFX are also good brands; seasonic makes many of their psus aswell.

I have the 620w version and haven't had any problems with it for 3 years. 5 year warranty
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a b 4 Gaming
a b ) Power supply
May 25, 2014 7:10:33 AM

That xfx PSU is plenty for a single 270. You could actually get a 550w xfx.

Edit: Yea I would go with 750W for crossfire..
a b ) Power supply
a b 4 Gaming
May 25, 2014 7:39:26 AM

power requirements:

Z77 motherboard chipset : 8 watts
GPU R9 270 : 120 watts MAX while gaming
DDR3 RAM : 8 watts each stick - 16 watts
i5-330P : ~70 watts
HDD : 10 watts

TOTAL 224 watts

2 things:

please do not have an upgrade path of Xfiring a lower end card. stepping up to a better single card is much more advisable. and also don't get a PSU with wattage that is more than twice the amount you need - you completely throw efficiency out the window.

this will work if you are on a budget:
Antec VP-450 Price: $37.99 & FREE Shipping.

though it doesn't have PFC it still provides good efficiency:
Antec VP450 Power Supply Review
Power supplies without a PFC circuit usually provide, at least at some point, efficiency below 80 percent. However, this simply didn’t happen with the VP450, which presented efficiency between 80.3% and 85.5 percent. This unit, though, can’t qualify for the 80 Plus certification, as a PFC circuit is required to obtain it.

In addition, most budget power supplies have a fake label that says the unit has two +12 V virtual rails, while in reality the power supply doesn’t have an over current protection circuit, which is necessary for the power supply to have more than one +12 V rail. This doesn’t happen with the VP450, which really has two +12 V over current protection channels.
a b ) Power supply
a b 4 Gaming
May 25, 2014 10:48:13 AM

I am getting the XFX PRO750W Core Edition 80+ Bronze (Now I just need to get good graphics cards so that I can reach the 40% load *sigh*)

The Antec 900 has the windowed side so HCG M 750W might be a better idea if you care about tidiness and airflow. I have the HCG M 620W and it is amazingly quiet. For me personally I prefer the non modular PSU now that I have a good sized mid-tower since the modular power supplies have a modular board that uses different capacitors and it is easy enough to bundle the wires next to the power supply in any mid tower with bottom mount PSU

a b 4 Gaming
a c 93 ) Power supply
May 25, 2014 11:01:49 AM

The Antec HCG semi/modular psu's are Seasonic rebrands, arguably the best there is. The non-modular are made by Delta, arguably the best there is. Either way, you are looking at excellent psu's, in a select group of 'the best there is'.