Few days ago upgraded my CPU to a Q9650.
Two things.
1) 1st Boot always fails. Will need to remove the power cable or turn off the power switch at the back of the PCU.
Maybe i have to do this 1 or 2 times. But after that it will boot and all ok.
I did noticed some of the onboard leds been red but i will need to remove the PC from under the desk in order to look closer (no space available to look inside from the side.) Greg you know what i mean.

2) All good so far up to 9x435 FSB.
with 1002bMod bios i was able to boot into 440x9. thats it with the mem.timings from
1st Information : 5 - 5 - 5 - 15 - 5 - 52 - 12 - 6
2nd Information : 8 - 6 - 6 - 4 - 7 - 4 - 7
3rd Information : 23 - 8 - 1 - 6 - 6


The memory is 5-5-5-18 Common Performance Level [07]
Ai Clock Twister [Lighter]
Refresh Period [16120T]

I think i have CPU Clock Skew Delay 300ps and NB Clock Skew Delay 200ps

With 438x9 i manage prime95 in large FFTs only to fail on the 2nd day. It will say HW error detected around the 3rd,4th pass.

Still rock solid on 435x9 though.

back to 4x438 Changes the timing to 5-5-5-15 or 12 Common Performance Level [07]
6-6-6-18 or 21 Common Performance Level [07] and even (8) with no luck,

raised cpu volts, fsb volts but nothing.
What do you think it might be causing this here.
It looks is the memory timings. What can i do?