It's a real crap shoot. Throw it in and see what happens. I'm guessing in the 2.8ghz range from what I've seen around that year/week stepping.
Most CCBWE's won't go too high, but I guess 2.8 should be possible, unless you have a Vapo or something
What stepping is that 4000+ btw?
Cheers for the replies so far.
@freeloader, currently achieved this , not the best result, will keep trying, got some different memory coming (2x 2Gb mushkin E3200), not sure if its going to help thou.
@knopflerbruce, Aint got a vapochill, too much work :p, below is my 4000+, served me well, been rock solid at 3Ghz for 6+ mths.