I was wondering if a 600W PSU (power supply unit) is good enough to run the following:

  • Core i3
  • 2 medium quality video cards
  • 2 or 3 hard drives
  • 4GB ram

migrated from serverfault.com Nov 12 '10 at 2:02

This question came from our site for system and network administrators.

  • Which video card(s) are you using? – Cᴏʀʏ Nov 11 '14 at 20:52

PSUs tend to vary widely in quality (particularly at the low end), and depending on the video card, current rating may be important as well. Some cheap PSUs may put out much less than their rated power at full load, and others advertise a high power output but can't handle the current draw that some modern video cards incur.

Most 600W PSUs of reasonable quality should be fine with what you describe, though.

  • 80+ certified is something to look for :) – John T Nov 12 '10 at 2:17
  • 1
    The quality of the components used in PSUs vary, even with an 80 PLUS cert sticker. – Force Flow Nov 12 '10 at 2:32
  • Well of course, but it gives you a baseline to weed out the bad from the horrible. – John T Nov 12 '10 at 4:55

This heavily depends on the model of the video cards. Most will list a minimum PSU requirement. You should be content with 600w if the cards are on par with HD 4850's or less.

I'd have a look at Newegg's Power Supply Calculator.


I usually refer to this PSU calculator and this PSU brand guide list


I bet you could run that system on a 400W with no problems.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.