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PSU for 2*hd6850 new gaming rig?

I already order NZXT Phantom PHAN-001BK Black Steel / Plastic ATX Full Tower Computer Case

Havnt order any other part, though most important is to build 2*6850 crossfire for high end gaming(no overclocking), not sure what PSU to order...

Though about 650W/750W/850W but not sure whats the minimum required, I need stable system though...price for 650W is pretty reasonable ($70) while 850W is $130+ for good antec/corsair PSU with bronze/silver rating...

CPU would be either 1190T or I7-950...(motherboard/RAM depends on selection)

I am in delimma do I really need to get 850W or can do with 650W?
10 answers Last reply Best Answer
More about hd6850 gaming
  1. Even a Corsair 650TX can handle two 6850s. Each 6850 requires one 6 pin connector.
    650TX has two 6 + 2 pin connectors which can work as a simple 6 pin connector. The extra two pins just branch off. You may need to provide more info for all of your parts.
  2. heda_p said:
    I already order NZXT Phantom PHAN-001BK Black Steel / Plastic ATX Full Tower Computer Case

    Havnt order any other part, though most important is to build 2*6850 crossfire for high end gaming(no overclocking), not sure what PSU to order...

    Though about 650W/750W/850W but not sure whats the minimum required, I need stable system though...price for 650W is pretty reasonable ($70) while 850W is $130+ for good antec/corsair PSU with bronze/silver rating...

    CPU would be either 1190T or I7-950...(motherboard/RAM depends on selection)

    I am in delimma do I really need to get 850W or can do with 650W?



    like retalia said, a 650TX will be enough for Crossfire. but may I ask why your buying 2 6850's? Why not the 5850's? Also I would recommend go with the 1190T or if your budget can fit a 1100T. I would defientely look into overclocking it if I were you with sufficent cooling.
  3. A hexacore CPU offers no advantage in gaming. A 965BE would offer higher bang/buck, but an i7-950 would probably offer notably better performance from a multi-GPU setup.
  4. nzxt got some nice power supplies in white
  5. Agree with Jtt283 on gaming dont benifit hexacore...

    I bought corsair 3 channel memory for $60(2GB *3) 1600 12800

    Now I have to go with i7950 which is around $200 at microcenter

    asus sabertooth x58 probably be the motherboard

    will be adding h50 as cooler and probably 2 more fans (just to have better cooling for long hours high end gaming)

    6850 is better because of HD3D tech, which support all 3 3D formats and existing 3D hardware (open standard)

    Overclocking is not required since I checked with crossfirex you can play almost any game with best framerate (atleast 50+)

    Onus said:
    A hexacore CPU offers no advantage in gaming. A 965BE would offer higher bang/buck, but an i7-950 would probably offer notably better performance from a multi-GPU setup.


    So considering this setup do you guys think antec earthwatt 650W will not cause unstability for long high end gaming?

    I like to keep PSU under $100 but if required for stability I am okay spending money on corsair 850AX $160

    Thanks ~ Prakash
  6. Best answer
    I think the 650 Earthwatts will do fine if there is no overclocking stable 24/7 personally I would go with the 650tx or the xfx 750w
  7. This says 526 watts

    http://www.antec.outervision.com/PSUEngine

    The Corsair TX 650 and Antec EA650 are the best choices here. With the Antec currently being $50 on newegg, $30 cheaper than the TX650, it's a no brainer

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371015
  8. Yep. If I expected to need another [relatively powerful] PSU anytime soon, I'd be tempted by that one, just to put on a shelf for that price.
  9. amoghthegamer said:
    like retalia said, a 650TX will be enough for Crossfire. but may I ask why your buying 2 6850's? Why not the 5850's? Also I would recommend go with the 1190T or if your budget can fit a 1100T. I would defientely look into overclocking it if I were you with sufficent cooling.

    The 6850's perform much better in cf then the 5850's do.
  10. Best answer selected by heda_p.
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