E6600 system unstable after bios update

[genec57]

Is it normal for a system to be unstable to overclocking after a bios update?
This seems to be the case with mine. I was running stable at 3500, vcore 1.425.
I updated to the 680i bios version p23 and I only last a few seconds at orthos before the system locks.
Is it generally necessary to let the system burn in a bit after bios upgrade? I had the same problem a couple of days ago but attributed it to a beta bios now i am not so sure.
It is not an orthos failue. It is a complete freeze requiring power off to restart.
System specs in sig.

 

[Hard Ball]

back off on the DRAM timings, set latency for CAS and tRAS to be slightly longer; and see what happens.

 

[n7]

Often can happen.

It's the reason why people tend to run all different versions of bioses for the same board, since the newest isn't necessarily the best, & what works best for one person may not be the best for the next user.

Crazy, but kinda how things tend to be...

 

[genec57]

It's really weird. Here's the sequence of events.
I was at version P21, and went to P23beta. The system previously stable at 3600 became unstable at almost any oc.
Reverted to P21 and it was still not stable. I thought perhaps it was my SATA DVD and disconnected it. System became stable at usual overclock settings.
Today I went to the P23 bios and unstable. What I am thinking is that the bios needs a burnin period before it can be sucessfully overclocked. I really don't think my SATA drive had anything to do with it.
I don't think it is a memory issue because the memory is unlinked in bios.
It's all too weird. If anyone has any insights to share I would love to hear them.