Damn thanks for the detailed answers. I'm quite a novice in overclocking, I just followed a youtube guide and that was it.
Here are my userbenchmark results if that's of any interest!
UserBenchmarks: Game 65%, Desk 51%, Work 42%
CPU: AMD Phenom II X6 1090T
GPU: AMD R9 290X
SSD: Corsair Neutron 128GB
RAM: Corsair Vengeance LP DDR3 1600 C9 4x4GB
MBD: Asus Crosshair IV Formula
I ran it a few times and I actually got 100th percentile with my cpu and 99th with the gpu.
The temp issue got better since I installed afterburner overclocked it and configured the fans with it.
I have 43° at idle with fans blowing at 45% though. Oc values are 1130 core clock and 1450 memory clock. I tried 1150/1500 but it was unstable.
So yeah I guess I should replace the paste, because hwmonitor says they run at 2.3k rpm at idle!
I did as you told, lowered cpu nb voltage to 1.26 and it seems stable.
I don't quite understand what I should do with the ram though yet. I'm gonna run Prime95 now for a while to see how it goes and then change some things to the ram.
I should first try to raise HT Link Speed then?
I haven't updated the bios either, I thought it was up to date until you told me about version 3029. Will look into that.
edit: after an hour of Prime95, max temp is 47° and it usually is just over 40 on average. Blend test with defaults settings.
I actually got an error:
[Mar 1 12:21] Test 3, 4000 Lucas-Lehmer iterations of M19374367 using AMD K10 type-2 FFT length 1M, Pass1=256, Pass2=4K, clm=4.
[Mar 1 12:23] FATAL ERROR: Final result was A9120061, expected: D1045A66.
[Mar 1 12:23] Hardware failure detected, consult stress.txt file.
[Mar 1 12:23] Torture Test completed 25 tests in 31 minutes - 1 errors, 0 warnings.
[Mar 1 12:23] Worker stopped.