Overclocking & Folding Stability

LeonardoLeonardo Wake up and smell the glaciersEagle River, Alaska Icrontian
edited November 2003 in Folding@Home
I've had to lower the clock on my System 1 for stability when folding Gromacs. I tried vCore up, vCore down, different Folding clients - all to no avail. Finally prudence got the best of me; I ran the machine at default, 14 X 200 for 2800MHz, for a couple days. Sure enough, every Gromacs processed from beginning to end without errors.

Previously, I had refused to believe the problem of Gromacs errors had been overclocking related. Well, apparently I was wrong. It seems that Folding was the ONLY application that revealed less than 100% stability of the previous overclock of 3500MHz. Presently, I boosted back up from default of 2800 to 14 X 240 - measured 3367MHz. So far, Gromacs are loving it. We'll see how it goes.

Comments

  • csimoncsimon Acadiana Icrontian
    edited November 2003
    leo what northbridge cooling are you using just out of curiosity?
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited November 2003
    This sink is on the northbridge, both System 1 and 2. One of the motherboard configurations required me to cut off about one fourth of the heatsink so it would fit - don't remember right now which board that was.
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited November 2003
    This sink is on each video card's GPU. No modification to the heatsink was necessary for either card.
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited November 2003
    What, you think NB cooling might be inadequate? I could mount a fan on the NB cooler and see if there is any difference.
  • DogSoldierDogSoldier The heart of radical Amish country..
    edited November 2003
    Yeah Leo, I had problems completing WUs with too much OC. I actually refused to believe there was a prob until I looked at the logs. Everything else ran without problems. I'm still operating 600+ Mhz above spec but F@H is stable. I haven't lost a WU since. I'll still need some new RAM down the road.
  • mmonninmmonnin Centreville, VA
    edited November 2003
    Its hard to tell. Some WUs just wont even run at stock speeds.
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited November 2003
    You're right - it is hard to tell. I've keep a log of failed Gromacs. I know what has failed on this machine (no. 1), and compared it to my AMD rig. But even then, it's tough, because the AMD rig tends to get completely different assignments, even with advmethods turned on.

    I'm going to continue running at 3360 and see what transpires.
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