Which power supply should i use?

http://www.newegg.com/Product/Product.aspx?Item=N82E16817341019 <--ocz stealthxstream 700w
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341018 <--ocz modxstream 700w
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005 <--corsair 650tx

i wanted the enermax infiniti 720w ($60 rebate), but zzf is sold out...

build is:
phenom ii 1090t
msi 890fxa-gd70
2x 2gb corsair @ 1600
ati hd 5850 oem (will crossfire some time down the line, will be at least a few months)

i also have an old psu lying around, antec bp500u, but it only has one 6-pin pci-e connector.
should i use that instead for now, with a molex to 6-pin adapter, then when im ready for crossfire, upgrade the psu?
6 answers Last reply
More about which power supply
  1. These are the official recommended power requirements for your GPU:

    500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode)

    This applies to the whole system not just your GPU.

    The Corsair 650TX is a great PSU but doesn't have the four PCI-E connectors required for Crossfire on your graphics card. However the 650HX does have four connectors and is a modular PSU which will help keep your case clean and free from unused cables.

  2. +1 what moody89 said.

    The Corsair TX650 is an older model. The HX650 is a newer model that has the required number of PCI-e power connections for the ATI Radeon HD5850 video card.
  3. trying to stay below $70 for a new psu though...
    should i just use the antec with a converter then and wait until i decide to crossfire and look for one?
  4. meh, how about this one then?
    Corsair TX750W, $80, has 4x 6-pins
    i suppose ill just have to eat the extra $$$ then x_x
  5. Thae TX750 is another excellent choice.
  6. That too will be more than enough for your needs. I guess you'll have to spend the money at some point either way!
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