Which PSU is better for the price?

I am about to purchase a new build. Phenom II 955, Radeon 4870. I do want to overclock, and, in the future, very well may Crossfire, though I am not right now. Which of these two PSUs do you believe to be better, considering price?

OCZ ModXStream Pro OCZ700MXSP 700W ATX12V V2.2 / EPS12V SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC Power Supply compatible with core i7
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341018&nm_mc=EMC-IGNEFL071009&cm_mmc=EMC-IGNEFL071009-_-PowerSupplies-_-LC2A-_-17341018
This one is the cheaper of the two, being only $60 after MIR, but it only has one 6+2 pin.

CORSAIR CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005
This one is 90, but has 2 6+2 pins.
11 answers Last reply
More about which price
  1. Your 4870 does not require 8 pin pci-e connectors, so the number of 6+2 pin variants is a non issue.
    The Corsair is a slightly stronger psu with 52a on the 12v rails vs. 46.
    Both are good quality. Take your pick.

    But... crossfire 4870 wants 4 6-pin psu connectors which neither psu has.
    http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-4000/hd-4870/Pages/ati-radeon-hd-4870-system-requirements.aspx

    You could use molex to pci-e adapters because the psu's are strong enough. But I hate to do that.

    I think by the time you want crossfire, there will be stronger and cheaper cards available.
  2. Get the Corsair 650TX <--- Rated BEST 650w PSU

    It will destroy that OCZ 700w in a heartbeat. Specially if you will xfire in the future.

    Btw they both have dual 6 pin connectors. Its just that the OCZ has shorter cables and it is not as stable as the 650TX....

    With a single 12v Rail @ 52a you will be able to power up to 2x 4850's in xfire, not sure if it will power dual 4870's but if you see a reviewer on Newegg that is using dual 4870's then you are good to go..If not then go with the 750TX @ 119.99$

    Hope this helps....
  3. It would falter on 2x 4870s?

    edit: I misread the first post. I wouldn't have the connectors. Got it.
  4. Ok looks like the 650w is a no-show....You need more power as far as the dual 4870's...

    If you can save up for the 750TX then go with that. You wont have any issues xfiring dual 4870's....
  5. http://www.antec.outervision.com/

    Above is power calculator. You can calculate base on your current and future loads. You stated you are considering crossfire.

    All good Power Supply Brand provide 6 and 8 pin GPU power connector. Thats the last thing you should worry.
  6. Well, the 750tx is only $10 more right now, so I am going to go with that, I believe.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006&Tpk=750tx

    Yay MIR!
  7. leon2006 said:
    http://www.antec.outervision.com/

    Above is power calculator. You can calculate base on your current and future loads. You stated you are considering crossfire.

    All good Power Supply Brand provide 6 and 8 pin GPU power connector. Thats the last thing you should worry.


    True, the calculator works fine to get all load info, but he needs a power supply to power a 955BE rig that will run dual 4870's in xfire. That said, with the 750TX he has plenty of power. I build and I use Corsair, Antec and Thermaltake PSU's so as far as his budget goes, there is no better PSU then the 750TX for its price. If there was a lil more cash involved then it would be another story.
  8. Crossfired 4870's only need about 20 - 22 amps for the video cards. A 650TX has plenty of capacity. More worrisome, though, is the lack of PCI power connectors. Like geofelt, I would rather not use adapters.
  9. I went with the 750tx, because it was only $5 more expensive, after MIR.
  10. Good call ^
  11. I second that......Your gonna love that PSU......
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