What PSU do I need?


I am building a new computer and want to choose a power supply. I'm not too familiar with PSU's so I would like to choose an affordable yet good quality one. What is the best PSU for my specs?

Processor: Intel i5 2500k 3.4 ghz (I plan to overclock)

Video Card: AMD Radeon HD 6870 in crossfire

Motherboard: Asus P8p67

Memory: Corsair Vengeance 4GB x2 DDR3 RAM - PC12800, 1600MHz

Hard Drive: Seagate Barracuda Hard Drive - 500GB, SATA 6Gbps, 7200 RPM, 16MB

I would really appreciate any input. Thanks in advance :D
6 answers Last reply
More about what need
  1. With a pair of HD6870 in Crossfire, a good size would be 650W, where you will begin to find the requisite number of PCIE power cables. You're building a nice rig, so I will assume your budget isn't too tight. Probably the best you might choose is the 80+ gold certified Seasonic X650: http://www.newegg.com/Product/Product.aspx?Item=N82E16817151088
    Otherwise, a modern quality PSU has full range active PFC (no little voltage switch) and some level of 80+ certification. Seasonic, Antec, Corsair, XFX, and Enermax/LEPA are among the better brands.
  2. A quality 650W would be plenty for your needs.
    Your cheapest option would probably be this:
    $60 with $20MIR.
  3. A QUALITY 650w would be fine, but if you plan to overclock the cpu and gpu's, I'd go with a 750w. It will give you upgrade room in the future as well.

    I recommend this awesome unit. 5yr warranty. Bronze rated. $30 rebate right now if you hurry.

  4. i would recommend Cooler_Master_Silent_Pro 700W ,as long as you are going for crossfire HD6870, and might be upgrading in future, and as long as you'll be overclocking and hoking up multiple fans, i guess it will be sufficient

    i would love to recommend you one of Antec TPQ series but they are expensive and out of production now but this CM silent pro proved so well in efficiency and taking load , in addition it's Modular
  5. Thanks for your input guys!
  6. Defo get the Antec that GeekApproved says.
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