@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.
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.
