semson

Hi oskarha, I understand, no worries. I played with risky thing this weekend. My X5450 is E0, to ensure absolute correctness of microcode I deleted everything except 067A_44, yes this is the only microcode in BIOS but still a NO go. I'm done now. Good luck to fellow hackers.

Hello oskarha, thanks a lot and I've tried the modded BIOS you provided, unfortunately the same lag persists

@oskarha could you share your modded BIOS? May worth a try to eliminate modding mistake.

I got the same laggy problem too. Technically it's not laggy but extremely slow! Booting to Windows desktop could take 30min. I did few investigations and could think of some trials in last December. I hope someone wiser than me can take it over and find out the fix. Findings: POST -> CPU correctly identified, no lag at all at POSTing stage. Real DOS mode -> still no lag, I can update BIOS under DOS without issue. Booting to customized Windows PE (2003-based) -> works smoothly too. This PE doesn't have power management feature so the CPU is running 1-core at full speed. CPUID -> I checked CPUID under WinPE, SSE4.1 and Vt-x is correctly identified so I guess the microcode is imported in the correct way. The Research: I did a rather extensive research on the net. Most opinions suggest that laggy of system is caused by CPU power management feature. The fix is to disable everything like: SpeedStep, C1E.... then I did: Disabled SpeedStep -> laggy as is. Activated hidden C1E feature with AMIBCP and disabled it -> still the same lag. Other trials I could think of: CPU stepping C0/E0 -> @Ctmz34 has confirmed not it. By the way mine is X5450 E0. Modding from older BIOS version -> didn't able to test. I could find some older BIOS in .exe but no way to extract it to .bin or .rom Last thing, @oskarha your guide demonstrating directly import of missing microcode 1067A, which is 99% of us who buying 45nm Xeon. But the BIOS already has 1067A, not the latest version of course. I think the good way it to delete the old one on BIOS, then import the updated version to it. Are you doing in the same way?