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GTS 250 SLI Power Supply

Hi all,

I currently have a pair of GTS 250 in SLI running off of a OCZ ModXStream Pro 600w Power Supply, but I'm having a lot of problems. Is this power supply enough to run SLI?

If not, I'm thinking of getting this power supply since it's on sale right now: http://www.newegg.com/Product/Product.aspx?Item=N82E16817341003 Is this one alright? Thanks a lot in advance.
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  1. ocz psus are mediocre at best. get a corsair. maybe a 650
  2. I contacted BFG tech support about this and they sent me this in response:

    "As far as the power supply
    goes, one GT250 requires a minimum of 475 watts and as a general rule in an SLI
    setup you should assume 1 + 1/2 for both cards in SLI. That would put you at a
    minimum requirement of roughly 712 watts, well outside of your 600 watt power
    supply."

    Any truth in this statement?
  3. For a pair of GTS 250 in SLI, the 600W PSU is marginal. For a system with a single GTS 250 the recommended PSU is 450 Watts minimum.

    Therefore, you may be better off with the 850 Watts PSU that you selected.

    In my system, I have a GTX-275 as well as a GTS-250 (PhysX) and I am using a HX 850 (850 Watts) Corsair PSU.
  4. berkeleyboi said:
    I contacted BFG tech support about this and they sent me this in response:

    "As far as the power supply
    goes, one GT250 requires a minimum of 475 watts and as a general rule in an SLI
    setup you should assume 1 + 1/2 for both cards in SLI. That would put you at a
    minimum requirement of roughly 712 watts, well outside of your 600 watt power
    supply."

    Any truth in this statement?

    They're out of thier minds.
    http://www.tomshardware.com/reviews/geforce-gts-250,2172-10.html
  5. shovenose said:
    ocz psus are mediocre at best. get a corsair. maybe a 650



    "OCZ ModXStream Pro 600 W proved to be an outstanding mainstream 600 W power supply, surprising us at all and every level."

    http://www.hardwaresecrets.com/article/OCZ-ModXStream-Pro-600-W-Power-Supply-Review/936/9
  6. Hmm... it seems like I'm getting contradicting answers here. Is my power supply alright or do I need a new one? If I get a new one, how many watts do I need and what brand should I get?
  7. Best answer
    sometimes im shocked that anyone would ever come here seeking help by some of the answers i read.....
  8. Whether your PSU is enough or not depends on the rest of your hardware.

    Use http://extreme.outervision.com/psucalculator.jsp and look if it suffices.

    But all in all i think your ModXStream 600W is enough for your two GTS250.
  9. Based on the calculator, it seems like I have enough power. And I have run OCCT power supply test for 2 hours without problem. I'm starting to think the BSOD isn't because of the power supply since I'm getting the BSOD even with just a single video card.
  10. are both cards giving you the BSOD as you run them individually or just a specific single one?
  11. I am currently testing my memory again with memtest. Afterwards, I will check the other video card by itself to see if it BSODs on me.
  12. And although I might not need a new PSU, the 850w one has really good reviews from some sites:

    http://www.overclock3d.net/reviews/power_supply/ocz_gamexstream_850w_atx_psu/7

    And since it's on sale for another couple hours, should I just go ahead and grab this thing for 50 bucks?
  13. Best answer selected by berkeleyboi.
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