I can get mine to 4.8Ghz with 1.410 Vcore. Some other overclocks I have managed to achieve are 4.5Ghz at 1.300 Vcore. And my current overclock is 4.7Ghz at 1.380 Vcore. The reason I stay at 4.7Ghz is because the temps stay somewhat under control with 1.380 Vcore. I'd say with the cooler you have tops would be about 4.5-4.6Ghz. I say that because the cooler you have is not quite as good as some of the other coolers they have out there although it is a great bang for your buck.
Really though, if I were you, I'd go for 4.5Ghz. I'd turn all powersaving features off. Set it to where it stays at 4.5Ghz and doesn't fluctuate. I wouldn't mess with to many of the other settings but the multiplier and Vcore voltage unless you know what your doing. So I would set your multiplier to 45 and then I'd set your Vcore at 1.320 and see if it's stable with Intel Burn In Test and make sure to run a few games too. If it is stable I would then lower your voltage by 0.01 increaments until it's not stable anymore. Then go back up to where you where when it was stable. And that's a perfect overclock right there. Your temps should be around 80-85c in IBT with that overclock. If you use prime95 your temps will be about 10-15c less than IBT.
eric, how many gflops does your 4.8ghz ivy do with intel burn test?
Hey I wanted to answer your question because I was JUST wondering the same thing. I was thinking " I wonder what Gflops other get during IBT?". But my 4.7Ghz overclock get's 129.78Gflops on average. Sometimes 130 sometimes 128. I think that is pretty high though right? I mean most others get 110-115 I notice. Reply to this if you ever notice I sent this reply.
Yeah that sounds right on par with what I was thinking. I thought the 3570k's IPC changes only gave it about a .2Ghz advantage but it looks like it gives it a little over .3Ghz of an advantage since my 3570k is at 4.7 and yours is at 5.0Ghz and I still get a little more. I get about 92C average in IBT though. 79C average in prime95. I bet you get better temps than me? The 3570k does have IPC advantages but the 2500k can overclock about .3-.4Ghz more. So they are pretty much the same. I just hope that Haswell doesn't beat us by too much. From what I read Haswell is mainly about graphics.