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SETI gpu query/problem

Discussion in 'Team OcUK Distributed Computing Projects' started by Pilgrim57, May 13, 2017.

  1. Pilgrim57

    Wise Guy

    Joined: May 20, 2006

    Posts: 1,049

    Location: London

    Win 10 64 bit, Asus Strix nVidia 970 4GB. i5 3570k @4.GHz
    I have tried several times to find out what the problem is but I get poor crunching times from this card.
    I have seen a 750 complete a guppi WU in a 1/3 of the time I have taken with opt client which they aren't using.
    Vanilla BOINC ord. WU about 7 minutes. The guppi WU generally take 25 minutes.
    With the Lunatics opt. ver 0.44 ord. WU take about 5 to 6 minutes but guppi WU time increases to 30 minutes!:o
    W/o lunatics card performs@ 90%+ most of time but with guppi WU it can keep dropping to 60% for short periods, 1-2 secs every 5 seconds.
    With Lunatics GPU never gets above 60% load and with guppi I see the drop in load for part of crunching time so the profile is very jagged, like a saw.
    I tried running 2 WUs together but this only lengthened the time so that 2 together were actually the same or slower than 1 on its own.
    I have tried different drivers without any effect.
    I should note that with FAH card performs without a problem, a level 98%.

    Is this just not a good card for SETI? It only seems to be about 20% faster than my 560Ti.
    Any thoughts?