Quote Originally Posted by John600rr View Post
I did a little FSB testing with the vMCH pencil mod today and thought I would post:

I've had my P5W DH for well over a year now so I figured I could push on it a little to see if something would break. Here are my results for pushing the vMCH:

**All voltages are measured on the board**

1.65 vMCH: 390 max FSB
1.67 vMCH: 401 max FSB
1.71 vMCH: 405 max FSB
1.75 vMCH: 411 max FSB
1.77 vMCH: 420 max FSB
1.81 vMCH: 423 max FSB (odd POSTing issues start)
1.85 vMCH: 425 max FSB (no where near stable, wouldn't POST 25% of the time)
1.91-2.0 vMCH: Would do 427-428 but had crazy rebooting issues which would put the board into some sort of over voltage protection mode which would limit the FSB down to like 290.

I settled at 420 FSB since it's stable enough and the northbridge is still only warm to the touch.

I am curious, what voltages are you guys getting on the board with the new rev boards which allow for 1.85 vMCH in the BIOS?

CPU-Z of the 420 I settled on:
http://valid.x86-secret.com/show_oc.php?id=234629
Thanks for the details, I'll give those voltages a try. What's your idle/load temps with 420 FSB?