reseat DIMM & CPU (check pins)Hi! I also have the E3C246D2I motherboard and I'm running into memory issues as well, I installed a Xeon E3 1245 V5, one stick of KSM26ED8/16HD (which kingston says is supported) but I can't get it to post, it looks like a memory issue (Intel error code 55)
if nothing helps, try other memory. maybe the stick lacks JEDEC 2133Mt profile(required for E3 1245 V5)