I am overclocked to 4.9 on a SB2500K. I was having problems with idle freezing and to resolve it I have had to take the LLC to level 1 (flat line) and increase the offset to +.005. I am very stable now but running higher voltage than I was before and higher temps. With FSX running my temps are between 65 and 84. The two inner cores hitting the low 80's once in a while then dropping back into the mid 70's. Voltages while running FSX are 1.40 to 1.416.

OK, nevermind, the temps are fine....and here is why.....after posting yesterday I took out the vacuum and cleaned out my case filters which were quite dusty. I also vacuumed the cpu fan. Today running under very heavy load (NGX, Thunderstorms, etc) the temps were in the 60's and the max was only 72C. Amazing what a good dusting can do to your temps.

Nice temps! That is actually the same exact voltage and clockspeed that I happen to use on my chip also. Although, my temps are a bit lower since I am on water... High 40s to mid 50s in FSX and low 60s to mid 70s in IBT.