Just managed to reach 4ghz stable on this, now, may I say retro pc based around the Asus Rampage II Extreme X58 board and a D0 stepping I7 920. After months of struggling (albeit I gave up untill a few days ago) it works!!
I got this system as untested but everything worked straight out of the box… The best part? It only cost me like $30, I had to use my hdd and the psu to make it usable.
As for the oc, this is a locked cpu so all the work had to be done via the bclk… Which means you also needed to tweak almost every voltage available lol. 4ghz required 1.376v and a bunch of other voltages (qpi, cpu pll, ioh, you name it)
The end goal for this pc is to make it into a period correct gaming beast. I'm talking 2x GTX 260/280, VelociRaptor drives and an ssd.
The essential specs are as follows:
Intel Core I7 920+Scythe Mugen 2 Rev B
Asus Rampage II Extreme
OCZ oczx3x1600r2lv6gk "i7 ready" 3x2gb ram
And of course the beloved Coolermaster Cosmos S case