I'm not really a newb in general, but I am regarding overclocking. I've done some oc'ing in the past, but only in the 10-15% range I'd say. I got more excited about it recently with a 1090T and xhair IV. I let the Asus EVO utility do the first pass. this got me up over 3.8ghz with a 16 multi and an NB speed of something in the low 240's. I then lowered the NB to 235 and raised the multi to 17. CPU voltage was about 1.38 more or less (although I had thought it was lower for some reason). I can't remember the NB volts - probably 1.35 but I'm not sure. I ran OCCT linpack for 3 hours with no errors. So I set the CPU loose on WCG. At first I got a few errors but not a lot and they didn't occur all of the time. Recently though it's gotten a lot worse. I checked to see if other crunchers were getting errors on these work units and a few had but mostly, I was the only one. So I figured that despite my stress testing, the oc must not be stable. That brings us up to last night. I figured I should really beat the piss out of the CPU, so I ran linpack PLUS prime 95 on the high-heat setting. I set it to run for 8 hours. I'm about half way through and there aren't any problems. I did have a couple of crashes initially so I raised the CPU volts to about 1.39 (a shade under that right now). I set everything else to default. then, beside the cpu volts, I let the m/b set the ram volts to 1.65. I set the multi at 20 and didn't touch anything else. Final oc was 4013mhz. So, my question is, how do you know when you have a truly stable oc. According to most of what I've read, the 3 hour linpack test should have done the job, but obviously it didn't. Now, running for 8 hrs with both linpac and p95, if this sucker isn't stable now, I'm gonna be rma'ing some shit.