Quote Originally Posted by mremulator View Post
Have a look where prime crashes on blend... mine kept crashing on 4096 FFTs, however, ran 24/7 with small FFTs only. Therefore, I concluded that it was down to memory timings/voltage and not the CPU. So I raised the Vdimm a little and slackened off my RAM timings... it still crashed?? So... I lowered the BCLK from 200 to 190, now it's stable @ 4.0GHz (21x190) and it could only do 3.8 before. Yea I know it's still 3.8GHz for multi-threaded apps, however, I have an "A" revision chip and I'm happy with 3.8GHz stable for 24/7 use.

Try running a "custom" session of Prime with min/max FFT size set to 4096 for an hour and see what happens. The way I understand it is small FFTs for CPU testing and large FFTs for memory. So I run small FFTs (12 hours+), blend (12 hours+) and custom 4096 FFTs (1 hour). Then I consider it stable.
Good point, i might look into that later. I wonder if you can set 5000k+ FFT's, to use up the same amount of memory linpack does.

Don't pay much attention to a/b batch [note: not revision!], too early in the manufacturing process for it to be that clear cut i think. I have an A and can go 4.2ghz+4.3ghz stable, and it's also one of the coolest chips i've seen, topping 60c~ @ 1.45-1.47v vcore