I can convert it to a 25Mhz if it is a 16Mhz. The 16 can OC just fine. I did one for someone here not long ago as well. The issue they had was trying to run a faster CPU on it caused issues with its speed, and he couldnt get a Buster 11 to work in it at 16. Once I converted all issues went away. I socketed all the work I did too so it could be reverted if he ever needed that done.