The small button shaped battery on your motherboard Pluck it out after switching the system off. Keep if out for about 3 minutes, and then put it back in.
Be sure to set the date and time after starting up your system again
I would say judging from messing with my cuz's one and from other reviews, the a10 should hit about 4.4ghz
You may run into issue before 4.4 with the stock cooler though so I would suggest getting a AFC like the 212 EVO if you want a highish OC
Yea i forgot to say that I got the 212 EVO because I was planing to seriously OC, but then when I tried OC there was starting to have some artifacts in Minecraft.
4.2-4.5GHz 4.5-5.0 if I remember good and now I'm on 4.2-4.2 and at one point I tried the X-Boost of motherboard and had same issues the Voltage was always at 1.36325 if I remember (normal is 1.35)
The small button shaped battery on your motherboard Pluck it out after switching the system off. Keep if out for about 3 minutes, and then put it back in.
Be sure to set the date and time after starting up your system again