Is a 650w PSU enough?

Hi everyone -- looking to put together my first system in 5 or so years and had a quick PSU question.

XFX has some nice rebates happening on their Black Edition PSUs through the end of the month, and the 650w is available with free shipping from (putting it at $69.99, with no tax for me)...

Anyway, I'm wondering if 650w enough for a 2500k build with an ASRock P67 Extreme4 motherboard. For the GPU, I can't imagine getting anything more than a 6950, but will likely be looking for something more affordable (at least for now).

The XFX 750w would run an extra $30 and I'd rather put that cash into another part of the system…

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More about 650w enough
  1. If you are not XFiring then 650W will be plenty for the system and Overclocking. In fact even XFiring 650W could well be enough. If planning on XFire and OCing I personally would be more comfortable with a 750W
  2. That's a steal. For a single hd 6950:

    500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended"

    For CF, look up your psu at:

    Unfortunately, they don't list XFX. In fact, I think AMD hasn't updated that site for HD 6900s.
  3. Cool - yeah, also offered a $10 coupon for signing up to their email list, so that get's it even cheaper (assuming the coupon arrives before XFX's rebate expires at the end of the week)...
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