X48 Rampage Formula Preview.

[Per Hansson]

Hi, I have a Maximus Formula soft modded to Rampage Formula with BIOS 0902 currently.
Portal 2 causes my system to hardlock with sound looping.
When rebooting Windows it lists hardware ID 18 and WHEA error in event viewer...

A fatal hardware error has occurred.

Reported by component: Processor Core
Error Source: Machine Check Exception
Error Type: Bus/Interconnect Error
Processor APIC ID: 0

The system passes Memtest86+ and can do 500 passes of LinX, and it is otherwise fully stable.
I am considering trying one of the modded BIOS files but I could not find any info on what is different in them?
I.e. what differentiates 1002b-R0 > R4? http://hotfix.chris123nt.com/Asus.Ra...mula/Bios.MOD/

My system has 4x2GB OCZ PC2-6400 2N800SR2G memory modules
Intel Xeon X3370 Yorkfield CPU (45nm, 12MB L2)
Asus 8800GTS 512MB VGA
Auzentech X-Meridian soundcard (C-Media 8788 based)
LSI 8704ELP RAID Controller