Weird overclock behavior

[MaverickNoob]

I'm getting some weird behavior out of an AMD FX-8350. I can always run it at 4.6 Ghz with 1.44v vcore. Now for the weird part, I can make it stable at 4.8 Ghz with 1.475v on vcore and nb voltage at 1.1250, but if I push it further say 4.9 Ghz or 5 Ghz which is unstable, if I try to go back to 4.8 Ghz at 1.475 vcore and 1.1250v nb it's no longer stable. Weird... right? So, to get back to 4.8 Ghz, I've got to spend some time at 4.6. Then after, days... weeks... I'll be able to go back to 4.8 Ghz at above voltages. Thoughts?

 

Thanks. I just thought I'd share.

 

Specs

MotherBoard: ASUS SABERTOOTH 990FX/GEN3 R2.0

CPU: AMD FX-8350

RAM: Kingston HyperX Beast 32 GB Kit (4x8 GB) 2133MHz DDR3 KHX21C11T3K4/32X

Graphics: ZOTAC GeForce GTX 980 Ti 6GB AMP! Extreme

HDD: 5 1TB 7200 rpm Western Digital

SSD: Kingston Digital 120GB SSDNow V300

RAID Controller: Adaptec maxCache 5805ZQ

PSU: Corsair RM750