i tested my am2 4200 and i reached 3ghz, but is not very stable
2.7 is ok, considering the odd multi on the processor
4200 is not exactly best amd processor ..so buyed the fx62 at 60% of market price from ebay, brand new ..
and as was sayed before.. you are covered, if is stable at 2.7 then that the limit .. you can try and burn it ofc
hope you turned off the cool and quiet....