With this testing around the Phoronix Test Suite we ran the Core i7 920 at its stock frequency (2.66GHz) and then overclocked it and repeated the testing at 3.00GHz and 3.60GHz. We were not able to push this processor any further than 3.60GHz with this motherboard and the stock cooling before running into stability problems.
The Linux tests we ran with the Intel Core i7 were Nexuiz, World of Padman, GraphicsMagick, timed PHP compilation, timed MySQL compilation, timed ImageMagick compilation, Parallel BZIP2 compression, LAME MP3 encoding, FLAC audio encoding, FFmpeg, GnuPG, OpenSSL, Sunflow Rendering System, Bwfirt, C-Ray, POV-Ray, BYTE Unix Benchmark, SciMark, and Fhourstones. While in this quick article we did not throw in any comparison systems, we made it easy for you to do so yourself. If you would like to see how your system(s) compare to the performance of this Intel Core i7 system on Linux, install the Phoronix Test Suite and run phoronix-test-suite benchmark michael-23540-28957-28437. It is really that easy!
Before jumping to the results, on the next page is the /proc/cpuinfo output for those interested from the Intel Core i7 920 when it was overclocked.