Trust me i can't do 3.6ghz stable ever since putting 1306 bios and now that you posted i thought i was nuts and mayeb CPU degraded or mobo is screwed... it still can be CPU degradtion...... but since you posted your issue.

I also went to 1201 Official . then to 0803 and same frigging thing .. can't pass linpack 1.4 at 3.6 no more.

So right now i am tryinh Kets modded 1201 bios to see how it is......

We as in you and a selected few .. may have to shut PC down... Unplug Power Supply Wire (after turning PSU off) and then clear CMOS with jumper and pull battery otu at same time and when done that with battery out and jumper crossed. push in the PC's power button a few times holding it about 20 secs each time ..... then let it sit for 10 min or 20 min and the uncross jumper . install battery and then plug PSU in and turn it on .... boot PC into bios load defaults .... then boot again and then set it and see how it goes.

Maybe there is a Quirk in Bios 1201 and 1306 as i could pass linpack 1.4 1201 then i could not so i upgraded to 1306 and same thing .. so for me it can be BIOS. CPU degration and or Mobo issue.

I am still tetsing it.

Anyhoo i am waiting for my E8600 to arrive and i hope all is fine with my MOBO and other parts.