8K7A and FSB >= 166, problem

[lemmingboy]

Ok just got the board yesterday. Stable from what I can tell so far! Seems to be a good board. However, I wanted to go high on the FSB, and I have heard great things about the 1/5 divider, but it didn't happen.

I flashed to the new bios with the 1/5, and tried to boot at 166MHz. It posted and then crashed. This was done with a 1.4 way underclocked (multiplyer 6). This was with the Ram voltage at 2.8V, will crash booting windows at 2.9V. I know the 1/5 divider exists cause it won't even post in the 154MHz-165Mhz range (NIC and SCSI card crapping out). This is with auto setting on the RAM, and everything but the FSB speed at the default. I have tried manually going as slow as possible with the RAM settings to beat this, no work. The RAM stick in case your wondering is a Consair PC2400. Based on the results of every review and here I know that this RAM can go much higher.

Whats up? Did I just get a bad stick or is there some setting I am missing? Any advice would be great!

Oh by the way the chip did well, it hit 1691MHz stable AYHJA 'Y' 2.05V. I know some have done much better, but it seems better than average.

 

[Rookie23]

I was under the impression that the 1/5 divider kicked in at 167MHz, not 166. Maybe I'm wrong, but it's worth a shot...