Hello.
I am trying to optimize my MSI R7950 and I have an issue I cannot resolve. After 4-5 minutes of mining (cgminer 3.5.0) GPU usage starts to jump from 64% to 99% frequently, as seen on screenshot (also configuration). To be precise: it stays on 99%, goes 100% for a blink of an eye and falls to 64% for another few seconds. Then back to 99, 100 and falls.
Happens on intensity 18 and 19. Also on 17, but with less frequency. 16 and below are ok.
Intensity 20 crashes almost instantly. I can't figure out how to change voltage - whatever I do, it stays at 1250mV.
https://i.imgur.com/eaMBi0L.pngGPU clock also jumps in same moments. (eg. core: 1050 MHZ -> 501 -> 1050, memory: 1400 -> 1250 -> 1400)I tried many voltage and clock configs and it happens all the time.
I searched and found people with same issue, however their solution won't help - I already have powertune to 20% (both in afterburn and cgminer config).
https://bitcointalk.org/index.php?topic=167392.0https://bitcointalk.org/index.php?topic=155842.0Any ideas? I'd appreciate any help.
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