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  • PSU for gtx 670 sli?

    As well as;
    i7 920
    asus p6t
    12gb ram
    4-5 hdd's, 1 ssd
    1 dvd drive.

    I'm thinking of getting a secons gtx 670 depending on how I find the one I'm waiting on, but was just thinking if my HX 750 would be adequate? I find it hard to believe that I could have always just gone with a 550 watt psu (for my current setup), instead of the one I got (Corsair HX 750). I mean, seriously where does a 750 watt psu actually fit in? I've heard so many people say you need a minimum of 1000 watt psu for sli 670's. Ok, so my cpu isn't currently overclocked, but say it was, do I still need that sort of psu? I almost feel a bit cheated having got a 750 watt psu when you can't sli with it. Or can I? Just with my cpu at stock? Seems a shame to sell a psu I paid what I paid for, for 70 quid.
    -Greg
    Monitor: Dell U2711, GPU: 2 x EVGA GTX 670, CPU: i7 920 , MB: Asus P6T, RAM: 12gb Corsair XMS3, PSU: Corsair HX750, OS DISK: Crucial M4 128GB, Storage: 2 x Samsung F1 1tb, 1 x Samsung F3 1tb 1x Samsung F4 2tb, Case : CM 690 II
    Photographic Gear: Nikon D700, 16-35 F4 VR, 24-70 F2.8, 70-200 F2.8 VR II, 35 F2D, 50 1.8D, 85 1.8D

  • #2
    To be honest mate, you have been cheated to an extent. I don't understand why anyone goes for anything between 550W - 750W as anything in there is overkill for single card setups but probably not enough for SLI.

    You may get away with it, you might not.
    Originally posted by andyn
    Trick in most cases seems to be to get in early, and get out early. Pump and dump.
    PC: - i5-3570k, Mushkin 64gb SSD, 8GB Vengeance, MSI Twin Frozr III 7850.
    Laptop: - Asus N55SF, Core i7-2670QM, GT555M (2GB).

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    • #3
      Well, it's new 28nm so it's not as power hungry but your processor kind of is.
      I'd say buy a new one but if you're short on cash then you might get away with it
      The North will never forget!

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      • #4
        750W is plenty it seems.

        http://www.guru3d.com/article/geforc...y-sli-review/4

        Freedom isn't free"



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        • #5
          i ran 2 470's on an 800W supply, 2 670's will sip power compared to 470's.

          Looking at my meter the most by system has ever pulled form the wall is 417W, so even adding another 680 it wouldn't be near 750. Mine is overclocked as well
          i7 2600K @ 4.5| Asrock Z68 Extreme4| 16GB 1866Mhz Crucial Ballistix |AMD R9 290| 120GB SSD |Win7 64bit

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          • #6
            Thanks for that finners and Wayneo. I'm not sure however if in the guru3d review the tdp they mention for the cpu, is for an overclocked cpu or stock?
            Monitor: Dell U2711, GPU: 2 x EVGA GTX 670, CPU: i7 920 , MB: Asus P6T, RAM: 12gb Corsair XMS3, PSU: Corsair HX750, OS DISK: Crucial M4 128GB, Storage: 2 x Samsung F1 1tb, 1 x Samsung F3 1tb 1x Samsung F4 2tb, Case : CM 690 II
            Photographic Gear: Nikon D700, 16-35 F4 VR, 24-70 F2.8, 70-200 F2.8 VR II, 35 F2D, 50 1.8D, 85 1.8D

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            • #7
              overclocked, says in the opening sentence,

              Our test system is based on a power hungry Core i7 965 / X58 system. This setup is overclocked to 3.75 GHz. Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). On average we are using roughly 50 to 100 Watts more than a standard PC due to higher CPU clock settings, water-cooling, additional cold cathode lights etc.
              i7 2600K @ 4.5| Asrock Z68 Extreme4| 16GB 1866Mhz Crucial Ballistix |AMD R9 290| 120GB SSD |Win7 64bit

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              • #8
                HX750 is a very decent 750W psu, I reckon you'd be fine
                --
                Fractal R4 (shhh!) 3570k, z77x-d3h, 16gb, R9-270X, 240gb SSD, 2tb mirror w/ 60gb cache drive

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                • #9
                  Cheers, thanks guys
                  Monitor: Dell U2711, GPU: 2 x EVGA GTX 670, CPU: i7 920 , MB: Asus P6T, RAM: 12gb Corsair XMS3, PSU: Corsair HX750, OS DISK: Crucial M4 128GB, Storage: 2 x Samsung F1 1tb, 1 x Samsung F3 1tb 1x Samsung F4 2tb, Case : CM 690 II
                  Photographic Gear: Nikon D700, 16-35 F4 VR, 24-70 F2.8, 70-200 F2.8 VR II, 35 F2D, 50 1.8D, 85 1.8D

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                  • #10
                    You should be OK, I have a HX750 and it ran 2500k at 4.6 with SLI GTX570s with 3-4 hdds and never had a problem.

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