I've built a system with Core i7 920 proc, SuperMicro C7X58 MB, 12 GB of RAM, and 4 SATA drives in RAID 5 via the Intel Matrix RAID. My issue is various STOP errors when the system is under sustained disk IO. With the QPI speed set at 6.4GHz, attempting to make a copy a 30GB file on the local disk would cause a STOP 0x00000124 in ~30 secs. Setting the QPI to 4.8GHz resolved this issue but I still get frequent crashes when trying to copy large files to the disk array. For instance, I've made 5 attempts to copy a 100GB file from my main computer to this one. In each case, the file copy runs for a couple hours and then the system crashes. In the event log are WHEA-Logger messages saying either "Memory Hierarchy Error" or "Internal Unclassified Error". The system ran memtest overnight without error and seems stable except for when doing heavy disk IO. Seeing that reducing the speed of the QPI bus helped this issue, is this a faulty proc, MB, or something else? Additionally I have updated to the latest MB BIOS and disabled all power management and turbo features of the proc.
