I let the motherboard make that determination (FACTORY BIOS)... I left all settings on AUTO, except for DRAM voltage and timings. The overclock was completely performed using the the AI Suite 3 and was stable enough to run Cinebench R15 and 3D Mark Time Spy with impressive results, as well as DOOM and Rise of Tomb Raider. I also let AI Suite 3 make the determinations for fan curves, as I have all my chassis fans connected to the CHA_FAN headers on the motherboard. Even if you delete the software after the overclock, the AI Suite 3 allowed monitoring on a firmware level. It will actually cause a crash, then revert to best known settings for stability... Each system will vary slightly, but with the same DRAM, motherboard, and CPU architecture we should only be talking about a few hundred megahertz. I had better benchmarks with 4.02GHz than 4.20GHz according to Cinebench. Felt the same for me. I couldn't get the blazing high 145 BCLKs that other users are getting.
TY for the info. My first OC on this board was through AI Suite 3, but I almost had to change my shorts after I saw the voltages it was applying (upwards of 1.45) lol.
I think AMD wants the CPU at 1.375V, and I would have been concerned to raise voltage that high also.
I am pretty sure I remember reading somewhere that AMD recommended not going over 1.35v to avoid degradation. That is what I have been basing my voltage decisions on, and why I am only slightly uncomfortable with my current 1.3625V