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  1. The GTX 670s actually consume less power than the 570s. An SLI of GTX670s requires a 750W PSU with at least 48A on the 12V rails and four 75W 6-pin PCIe power connectors. The OCZ ZT 750W PSU with 6+2pin PCIe power connectors and 62A on the 12V rail is sufficient for your planned build.
  2. Do you already have the psu ?
    What are the rest of your specs ?
    Do you try and overclock your system into oblivion ?
    Helps to know these things
    I'd go with the 670 in SLI, lower power consumption, higher performance
    http://www.guru3d.com/article/geforce-gtx-670-2-and-3way-sli-review/4

    Should be able to handle the 570 in SLI as well, just wouldn't want to be running Furmark to often
  3. yes, it should be able to run it, as a single 670 at stock takes about 28 amps including rest of the computer load, 2 will bump it somewhere in the 40s/50 amps on the 12 rail, while the psu itself has 62 amps on the 12v rail
  4. delluser1 said:
    Should be able to handle the 570 in SLI as well, just wouldn't want to be running Furmark to often

    Yeah, this.
  5. +1 on Furmark and 570s
  6. dudewitbow said:
    yes, it should be able to run it, as a single 670 at stock takes about 28 amps including rest of the computer load, 2 will bump it somewhere in the 40s/50 amps on the 12 rail, while the psu itself has 62 amps on the 12v rail

    So 2 670s will work fine?
    BTW my build is: http://pcpartpicker.com/p/8HNn but this build only has 1 670
    :bounce:
  7. Best answer
    Jonjon627 said:
    So 2 670s will work fine?
    BTW my build is: http://pcpartpicker.com/p/8HNn but this build only has 1 670
    :bounce:


    Power consumption then, two GPUs consume roughly 300 Watts whilst three GPUs use roughly 450W, add to that the rest of your system (processor, chipset peripherals) at say 200 Watts and you'll find yourself in the 650~700 Watt power consumption region when playing a hefty game. If you plan to overclock CPU and GPUs, then make sure you add another 200W onto your PSU requirements. Our recommendation really is to go with an 800~900 Watt power supply if you plan to go with 3 GeForce GTX 670 cards and a beefy system. Overclocking equals increased voltages equals increased power consumption equals much more load on the PSU.

    though they are extremely understating the cards wattage draw and overstating the rest of the computers draw, the rest sounds about right. You can probably get away with an overclocked cpu and 2 gpus at stock, but my knowledge of power consumption past that point is probably very limited, as i usually work and think with budget builds.
  8. Best answer selected by Jonjon627.
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