EDIT: I just noticed I mistyped the title of this thread is should read: "4332HE Throwing ECC Errors in Linux-Bench" Specs: Supermicro H8SCM-F AMD 4332 HE KVR16R11D4/16 (16GB x 2 RDIMMs) Prices on Ebay for 4332 Opterons have gotten super low so I thought it was time to upgrade from my old 4171 HE. So to put the CPU though it's paces I've been doing a little stress testing/benchmarking. Unfortunately, my server keeps hanging in Linux-bench. When the Unixbench Dhrystone tests run the system event log in IPMIView starts throwing up: Code: Assertion: Memory| Event = Correctable ECC@DIMM1A(CPU1) filling the log and by the Whetstone tests Ubuntu hangs. I've tried swapping slots and the error is always DIMM1A. My RAM is on the list of tested by AMD with 4200 & 4300 Opterons albeit at lower than stock 1600Mhz. I don't recall really stressing the old 4171 HE much except in virtual machines but it seemed stable. What could be the cause of instability? Heat? (IPMI never showed anything too high) Memory clock too high? (I'd be pissed if I have to go down to the tested 1066) Bad Memory? (Errors always on the same slot, but I'm running Memtest86+ v4.20 to be safe) Bad CPU or even worse MOBO? I've another Supermicro H8SCM-F, more RAM (UDIMMs and non-ECC) and of course the old 4171 HE I could swap out; but is there a less drastic next step I'm overlooking?