Romanian overclocker, Matose, just put up some big overclocks with a P67X-UD3R-B3 board clocking all 2D and 3D tests at 5.9Ghz with his nice 2500K. He said:
"I used my good 2500K that did 5919MHz on M4E cooled by Dimastech Single-Stage. For the 3D tests I used MSI GTX580 Lightning on LN2 with Ryba Fat GPUpot. Now, let's see if the little guy can match the twice more expensive M4E..."
I found a screenshot with wprime 32M and 1024M world records for 2500K on HWBOT with this “little guy” called P67X-UD3R!