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Corsair CX500M PSU for GTX 780Ti?

As the title suggests, I am wondering if this PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139050
is sufficient for this card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814487003

I'd like not to have to buy a new PSU, if possible.
13 answers Last reply Best Answer
More about corsair cx500m psu gtx 780ti
  1. Best answer
    you need minimum 800W psu gold rated from my suggest

    Temp max.
    95
    Cunsumption
    250 W
    min psu wattage
    600 W
    power connectors
    6-pin & 8-pin
  2. 800W minimum for a single card?...

    The 780 Ti requires at the very least, 42A to a 12V rail.

    That being said, your current PSU, the CX500M, provides 38A to a 12V rail.

    I would highly recommend upgrading your PSU before you even think about installing your 780 Ti.
  3. badboyrog2 said:
    you need minimum 800W psu gold rated from my suggest

    Temp max.
    95
    Cunsumption
    250 W
    min psu wattage
    600 W
    power connectors
    6-pin & 8-pin



    No, you don't need 800 watts to power a single card. 500 watts should work, but the power supply he has doesn't supply enough amps. 42 on the 12v+ rail is required, he has 38. While it might work, it isn't recommended, and it might just fry the card. Upgrade the power supply before attempting.
  4. A Good 650W+ Should do fine
  5. if he want to go to sli in the futur , yes he need 800W psu , better to prevent and stay safe ... that s the most important
    hardware
  6. A GeForce GTX 780ti needs at least 42 amps on the 12 volt rail and a 600 watt power supply.

    Here's a Seasonic built XFX at a great price:


    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($69.99 @ TigerDirect)
    Total: $69.99
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2014-03-07 17:51 EST-0500)
  7. Hey. Thanks everyone for all the quick replies.
    I just found this at Nvidia's site: http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-780-ti/specifications
    According to that, you guys are right. I need a 600W min PSU. But... the card uses 250W at full load. Using Ohm's Law that would mean the +12V rails would need to supply 21 amps.
    (I=P/E)
    (20.83=250/12)
    So, my PSU has the +12V current capacity, but doesn't meet the 600W recommendation. I may have to re-think this. The card is going in a Bitfenix Prdigy case with a 160mm-ish space front to back for the PSU.
    I have a 750W and a 850W PSU sitting unused. But they are too long.
  8. This Seasonic made 550w will run a 780ti.

    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($59.99 @ Newegg)
    Total: $59.99
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2014-03-07 18:04 EST-0500)
  9. The recommended amps (42) is to account for your entire system. Your system might not push 650W under full load, but it will likely be more than 500. But you are correct, the most a 780 Ti would draw is around 250W.
  10. The XFX 550W linked above will have no trouble running a system with a single 780ti.
  11. SR-71 Blackbird said:
    The XFX 550W linked above will have no trouble running a system with a single 780ti.


    I'll check that out.
  12. It's a High quality power supply.
  13. They also have a great deal on the 650w version.

    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($69.99 @ TigerDirect)
    Total: $69.99
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2014-03-07 23:48 EST-0500)
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