Hi guys, I've been out of the computer building loops for a while. Recently the wife nodded so I built myself one. I'm one of those that must get Prime95 blend test to run for 24hr before I can mark my build complete. As you can imagine this means a lot of tweaking and tuning. Today I noticed that I can no longer adjust the Vcore by 0.001 increments anymore using the A-Tuning application. When I increase the Vcore in A-tuning, and check the voltage in both HWMonitor and CPU-Z it doesn't move right away. I have to make a few increments (say 0.002 or 0.003) then the voltage on the CPU increased by a whole 0.005V! Right now I am running the CPU at 4Ghz at 1.250V I believe (yes, can only believe) my golden voltage value was 1.252. I was able to set this voltage at a previous run (got to 15hr52m before a worker died) couple days ago so I don't think I was dreaming. I am almost 12hr into Prime95 blend already now at 1.250V so this might actually be the new and true golden value. But if it's not, how do I adjust it to 1.252??? I attached a screenshot of my system information. You can see A-Tuning Vcore set at 1.249 but the VID is 1.250 (when I change A-Tuning to 1.251 it stays at 1.250 and so on... Also, does the bus speed always less than 100Mhz? it's bugging the hell out of me too :'( Thanks for reading!