750 w good for sli?

Hello,
I want to run a MSI GTX 660ti PE in SLI but I'm not sure if 750 watts is enough for that. Thanks
18 answers Last reply
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  1. Sorry forgot to specify that I want to run 2 660 ti's
  2. 750 Watts should be fine, but it depends on what your other components are. Also make sure that you have enough PCI connectors on the PSU. Try this as well: http://extreme.outervision.com/psucalculatorlite.jsp
  3. jmanmd said:
    Hello,
    I want to run a MSI GTX 660ti PE in SLI but I'm not sure if 750 watts is enough for that. Thanks


    Hi - 750w PSU is more than enough(assuming 2 hdd, 2-3 fans, 1 opt drive, & mainstream processor)
    for that rig, assuming it's a quality unit. What brand/model is it?

    Tom
  4. toyftw said:
    Hi - 750w PSU is more than enough(assuming 2 hdd, 2-3 fans, 1 opt drive, & mainstream processor)
    for that rig, assuming it's a quality unit. What brand/model is it?

    Tom

    +1
  5. IMO, those two cards fully stressed (why would you buy them if you are not gaming?) will pull at least 500W.

    Depending on how many HDs, how much ram (heatspreaders), cooling, CPU. (3820 will use 100W/3930=130W).

    I would say 750 is the MINIMUM. I would go for a 850W Silver rating and buy from a reputable manufacturer with a good RMA poilcy like Corsair.

    my 2 cents.

    Pegger 3D. :sol:
  6. PS:

    Seasonic is another good choice. Many PSUs from other MFGS actually have Seasonic guts in them.


    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151100

    Pegger 3D :sol:
  7. Pegger 3D said:
    IMO, those two cards fully stressed (why would you buy them if you are not gaming?) will pull at least 500W.

    Depending on how many HDs, how much ram (heatspreaders), cooling, CPU. (3820 will use 100W/3930=130W).

    I would say 750 is the MINIMUM. I would go for a 850W Silver rating and buy from a reputable manufacturer with a good RMA poilcy like Corsair.

    my 2 cents.

    Pegger 3D. :sol:


    Those cards don't pull anywhere near 500w during gaming - 750w psu more than enouhg.

    http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&sqi=2&ved=0CEkQFjAD&url=http%3A%2F%2Fwww.tomshardware.com%2Freviews%2Fgeforce-gtx-660-ti-memory-bandwidth-anti-aliasing%2C3283-14.html&ei=gPq7UJ7PKOfp0gH46YCYAQ&usg=AFQjCNHdKjxL8rDhWOaBadcDaFcVrT-6xw&sig2=hQXdaE6_bn_YCGxwVk43nw&cad=rjt

    Tom
  8. Pegger 3D said:
    IMO, those two cards fully stressed (why would you buy them if you are not gaming?) will pull at least 500W.

    Depending on how many HDs, how much ram (heatspreaders), cooling, CPU. (3820 will use 100W/3930=130W).

    I would say 750 is the MINIMUM. I would go for a 850W Silver rating and buy from a reputable manufacturer with a good RMA poilcy like Corsair.

    my 2 cents.

    Pegger 3D. :sol:


    Near 300W both at peak. 500 ? ?????
  9. Don't believe me?

    Read Guru 3D. Very good website....

    http://www.guru3d.com/articles_pages/evga_geforce_gtx_660_ti_sc_review,7.html

    Pegger3D :sol:
  10. Pegger 3D said:
    Don't believe me?

    Read Guru 3D. Very good website....

    http://www.guru3d.com/articles_pages/evga_geforce_gtx_660_ti_sc_review,7.html

    Pegger3D :sol:


    Plz read your own link - 253w full stress for total system! not gpu
    GPU power consumption from the link you posted = 135w!
  11. Pegger 3D said:
    Don't believe me?

    Read Guru 3D. Very good website....

    http://www.guru3d.com/articles_pages/evga_geforce_gtx_660_ti_sc_review,7.html

    Pegger3D :sol:



    Measured power consumption

    System in IDLE = 128 W
    System Wattage with GPU in FULL Stress = 253 W
    Difference (GPU load) = 125 W
    Add average IDLE wattage ~10 W
    Subjective obtained GPU power consumption = ~ 135 Watts

    GeForce GTX 660 Ti - On your average system the card requires you to have a 450~500 Watt power supply unit.
    GeForce GTX 660 Ti SLI - On your average system the cards require you to have a 700 Watt power supply unit as minimum.

    from your link
  12. Well, I'm not going to argue the point. I have a couple of friends who are SERIOUS gamers and they tell me they have learned their lesson about under rating power consumption..

    Yet another site that disagrees and rates them at 245 Full Stress each.

    http://www.legitreviews.com/article/2006/13/

    Pegger 3D.
  13. Dude, as the people above me have mentioned. this is the power draw of the whole system. Not just the graphic card..

    Try and do you own search and don't depend on "SERIOUS gamers" claims. It's common logic and also the only way to learn about things.
  14. simplest way to determine:

    reputable brand psu (eg. corsair, seasonic, antec, pc power & cooling & etc...) - check

    4 pcie connectors (in this case for SLI 660ti) - check

    your most affordable choice - check

    then problem solved, no need to do so much not so neccesary wattage calculations, you wont stress ur system (24/7 prime95, furmark etc) anyway
  15. Pegger 3D said:
    Well, I'm not going to argue the point. I have a couple of friends who are SERIOUS gamers and they tell me they have learned their lesson about under rating power consumption..

    Yet another site that disagrees and rates them at 245 Full Stress each.

    http://www.legitreviews.com/article/2006/13/

    Pegger 3D.


    What the H is the matter with you, read your own link above - 245w "TOTAL SYSTEM" POWER CONSUMPTION!
    Not 245w for the card by itself, 245w for the whole system.

    Plz stop posting unless you get your facts right
  16. Well, I guess you don't need my comments. You know everything. Those power ratings are for ONE CARD, not TWO.

    Enjoy. :pt1cable:
  17. Pegger 3D said:
    Well, I guess you don't need my comments. You know everything. Those power ratings are for ONE CARD, not TWO.

    Enjoy. :pt1cable:


    No, I don't know everything and yes we don't need your comments when they're not factual,
    and in fact misleading and doing a disservice to the original poster, whom we are trying to help.

    Yes, the 245w is tot system rating for 1 card, but you don't double the watts
    for cpu, hdd, ram, opt drive, fans, etc, they only get counted once. when you
    add a 2nd card you only add the watts for the 2nd card, in fact unless he has water cooling
    or something else that draws a lot of power, that rig with the 2 660ti's, proc, 3 fans, 2 hdd,
    2 sticks ram, 1 opt drive draw less than 450w.

    Tom
  18. toyftw said:
    No, I don't know everything and yes we don't need your comments when they're not factual,
    and in fact misleading and doing a disservice to the original poster, whom we are trying to help.

    Yes, the 245w is tot system rating for 1 card, but you don't double the watts
    for cpu, hdd, ram, opt drive, fans, etc, they only get counted once. when you
    add a 2nd card you only add the watts for the 2nd card, in fact unless he has water cooling
    or something else that draws a lot of power, that rig with the 2 660ti's, proc, 3 fans, 2 hdd,
    2 sticks ram, 1 opt drive draw less than 450w.

    Tom

    +1

    That pegger is just WRONG !

    670 Sli needs ~324W so 660 ti will need less.

    No need to worry . Even a good 550W will do the job ! (
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