- Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher than 1.60v could limit lifespan of the CPU
I doubt it with that cooler, 4.6GHz should be doable with about 1.32v.
Once you start to get up to 4.8GHz and above you'll need to enable PLL Overvoltage, which will see your temps soar.
@ zx128k have you tried lowering your DRAM voltage to 1.5v.