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Power on & SLI problem

  • 21-07-2013 8:17pm
    #1
    viperirl
    Registered Users, Registered Users 2 Posts: 316 ✭✭


    Hi Gents,

    Got my machine up and running after installing my watercooling loops however I'm having 2 problems:

    1. After I power on the PC, the PSU turns on for about 2 secs(pumps, mobo and fan controller all turn on) but then the PSU shuts down. After another 3 secs, the PSU turns back on again itself and the machine boots normally into windows.
    PSU is a Corsair 1200w. Worked fine in my old build.

    I'm guessing a fault is being detected somewhere hence the shutdown but why would it turn back on and stay on?


    2. Next issue is that when I enable SLI with spanning on 3 screens, windows becomes really really slow as in moving windows around is very very sluggish, almost non responsive.
    If I disable SLI, all is well again.
    (Note that spanning on 3 screens is working ok, the problem occurs when I enable SLI. Sometimes one of the screen wont even reactivate)
    (SLI bridge is also connected)
    I've updated/reverted drivers but the problem remains.

    Windows detects all 3 GPUs as working ok. Temps are an avg 27 degrees.
    CPU temp is mid 30's when idle. A brief Prime95 test raises that temp to an avg of 66 degrees across all cores.


Comments

  • #2
    viperirl
    Registered Users, Registered Users 2 Posts: 316 ✭✭viperirl


    No worries lads, problem solved, at least one of them for sure.

    SLI bridge connector wasn't seated properly, this despite windows detecting that it was connected. Once I fixed it, SLI is working fine.
    I tried Crysis 3 for a short while and temps across the 3 Titans are around 36 degrees, thats down from 80c when on the stock air cooling. Big improvement there.

    Also the PSU fault seems to have gone away. Not convinced its SLI bridge related as when I first turned on my PC this evening, the PSU behaved like above in the OP but I had no SLI bridge connected at all then. I'll keep any eye on it.


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