If I drop the FSB to 202 Mhz, I can run (safe and moderately quiet) Prime95, UT2004 stable at 2.63 Ghz on my 2400 Mobile. It's not quite as all-around fast as what's shown in my sig, but for UT2004, CPU power is THE ticket for high FPS in my setup.
My record with the 2400 mobile was 2.7 ghz on air, Prime95 stable with in-place large FFT. The heat was scary (56 C), and I'm sure that it wasn't condusive to long pprocessor life. With the fans howling, t wasn't good for my hearing either.:Q