Oh, i didn't see that you would be swapping out the CPU. My apologies. I thought you were going to O'C the 25Mhz to 40MHz or 50Mhz (Thereby doubling the intended frequency) and thereby, you would have killed it. I imagine you can put a 40 in it and OC it to 50Mhz. That would be more realistic. You never know till you try!!!