Well this sucks. I had just swapped the processor out to a 28-core Xeon. All seems fine for several weeks. Now I'm getting "errors detected on memory module". At first, I thought it was a particular ram module, so I moved the module to a different slot, but then two more errors popped up on different ram modules (some genuine apple, some not). This confirmed it wasn't a particular ram module at all. Anyone else have this issue before? Is it due to the 28-Core Xeon I purchased on ebay? It was a QS sample Xeon, and actually showed up as genuine retail from a reputable seller.