550w power supply for crossfire?

i m thinkin of gettin this combo along with 5750.

i might get an additional 5750 later and crossfire. would this 550w powersupply good enough to handle crossfire??

(i m gettin amd phenom ii x3 720 BE along with gigabyte 790gx motherboard and probly gonna overclock it.)
3 answers Last reply Best Answer
More about 550w power supply crossfire
  1. Best answer
    The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the 12 volt rail(s) can easily power a system with any single video card made. A high quality 700 to 750 watt power supply with sufficient current (amps) on the 12 volt rail(s) can power a system with two video cards operating in dual mode. There are a few exceptions like the new ATI Radeon HD 5XXX series cards which use less power due to their energy efficiency.

    A high quality 500 to 550 watt psu will have a +12 volt rail rated at 40 amps. A high quality 700 to 750 watt psu will have a +12 volt rail rated at 60 amps.

    Corsair, PC Power & Cooling, and Seasonic are some of the brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty. Lately we've been seeing a few other brands offering some high quality units. An example would be the Antec Earthwatts series which is an improvement over Antec’s older series psu’s.

    NOTE - If I recall correctly the official recommendation for a system with two ATI Radeon HD 5750 video cards operating in Crossfire mode is a 650 watt power supply rated at 40 amps on the +12 volt rail. An example of a good choice would be the Corsair TX650 power supply.
  2. How about this great deal on a good power supply with a free SD card (mail in rebate) :

    And this deal on this case:

    and save yourself roughly $50 from what you posted.
  3. Here is something that may shed a little light for you.

    I have a PC Power & Cooling 610w PSU 80+ certified, 49 amps on a large single rail... (link below)

    Anyway, i had it cranking an E8400 @ 4.0 with 2 x 4870 1GB in crossfire (both OC'd slightly) and i had no issues at all, worked like a charm for 6 months straight.

    Today i am using the same PSU in another rig (check my sig) and still no issues...

    Hope this better describes an answer you may be looking for.
Ask a new question

Read More

Power Supplies Crossfire Components Product