@Th0nt gotcha
I will try full blast later today 
Tried 4.3ghz, but needed 1.375V to get it stable-ish. Got a cinebench R15 run of 1703. R20 crashed halfway. I don't want to go to all-core 1.4V. Just too much for only 100mhz.
4.2 and 1668 in R15 seems reasonable at 1.3V (I will try tuning voltage, and then ram timings later.


Tried 4.3ghz, but needed 1.375V to get it stable-ish. Got a cinebench R15 run of 1703. R20 crashed halfway. I don't want to go to all-core 1.4V. Just too much for only 100mhz.
4.2 and 1668 in R15 seems reasonable at 1.3V (I will try tuning voltage, and then ram timings later.