Well if you got a frequency counter and patience you could trace the clock down and where it is divided... if the divider is not in the chips...
finding the clock input on the EE and GS as well as the I/O chip.... does the MB have a crystal out in the open?
replacing that with a faster one could be simple enough...
I'd like to OC the PS2... run some of my games with more stable framerates.... that'd sweet.... my friend has a massive VOM... it might have a counter on it... I think I'll check into that...
PS3 Slim 320GB
PS2 v11 exploit w/300GB Maxtor
PS2 v10 exploit w/80GB Samsung - Network Games
PS2 v10 exploit w/60GB Samsung - Network Games
PSP 1001 3.52M33 w/10GB total storage
NDS DSReal 4GB