OK. I have done some testing and ...
Under load - Intel Burn Test - 30 passes:
and after the test:
and Cache and Memory benchmark:
I know that voltage for both of CPU and CPU-NB are quite high but anything lower ended as failure in test.
That's the highest CPU-NB overclock I have ever hit on Phenoms II ... and it's a stable overclock.
The little problem is my memory. That was always this thing that held me back... I have tried to hit 1600 MHz with tight timings like 6-6-6-18-24 1T but with a voltage like 2.02 V it was always unstable.
My previous test with Prime95 was a failure because (that's my theory) Prime stresses memory very heavily (not like IBT).
My Ram Sticks hit 51*C under full load in Prime95 (blend) and in IBT it was only 38-43*C. After 1 hour one of the cores shutted down but the other 5 were still working without any problems.
Do you think it was because of very high temp on RAM ? Any way to cool those sticks down ? (this Scythe Mugen is just very good cooler but it takes a lot of space and a distance between Ram sticks and an egde of Mugen is like 5 mm (and I have seated them in bank 3 and 4).
Now, I am going to test if it is better to rise memory clock speed to 1700 MHz but with loose timings like 7-7-7-20-27 (need to change these Patriots because it actually limits my all OC.
One more thing. Even if in my previous test with Prime95 was not 100% stable (because of this heat probably) do you reckon that actually my system is stable now? Well, it's I can assume that I will never use all 6 cores with 100 % load for 4 h or more (in everyday use? .... nahhh)