ASUS recently released a new BIOS update (1303) for the P7H55M-Pro motherboard. The new BIOS addresses memory errors with the 0802 BIOS.
Memory tests revealed no issues but on rare occasions I was experiencing a couple of memory related errors. IRQ_NOT_Less_THAN_OR_EQUAL and PFN List corrupt errors indicate your BIOS and memory are not communicating correctly. This version of the BIOS may resolve those errors for you. These errors were exhibited under Microsoft Windows 7 Pro 64 bit edition and did not exhibit under Fedora 13 (KDE) or Kubuntu 10.04. Some have solved this issue by increasing RAM voltage to 1.7v for this as well. This BIOS update is a more appropriate solution.