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I have just got a DX79TO motherboard with a Xeon 2620 and would like to run it with four 8GB sticks of ECC memory.
The memory I currently have is Kingston KVR1333D3Q8R9S/8G (datasheet is here http://www.valueram.com/datasheets/KVR1333D3Q8R9S_8G.pdf)
I have updated the BIOS to the latest version (0494) but the board still does not recognise the memory and gives the 3 beeps indicating a memory problem. It boots fine if I use 4GB sticks of non-ecc memory.
Is there anything I need to do to enable ECC memory?