Overvolting on the 8INXP

I don't know if you guys noticed on your boards, but on my 8INXP my board overvolts by quite a lot. At default setting (1.525V), my actual voltage is 1.60V according to MBM and 1.618V according to the BIOS. Is there anyway to undervolt the chip in the BIOS, lowest option I see is Normal or default voltage and it won't let me go lower than that. While I may end up at 1.6V, if possible I would like to run my CPU at as low a core voltage as my overclock allows.

BTW I am using BigToe's modded F4 BIOS.

ye i noticed it too allthopugh it does not looks like it undervolts during load, do u know if it changes the cas timings like the p4g8x do when going beyond 140fsb ??

Well right now I'm running @ 166MHz with my timings at 2,5,2,2. No changes made by the BIOS. Set it at 2,5,2,2 when I initially set it up and haven't changed since.