A quick update. I've got the motherboard to boot with the Kingston kvr1333d3n9/4g DDR3 4GB memory module. I had the RAM in slot A2, not slot A1!
With the system up and running, I upgraded the BIOS via the 'Instant Flash' utility to version 2.40 - With the hope that this would improve compatibility to include my Samsung M393B1K70CHD-CH9 memory modules but with no success.
From other posts on these forums, I understand the problem is related to my memory (and most server memory it would seem) modules being the registered/buffered type.
The reason I bought this memory is for it's ECC ability. The fact that I have to use NON-ECC RAM to get this motherboard to work is defeating the purpose.
Is ASRock planning to bring out an BIOS update to fix this problem of incompatibility with registered/buffered memory and if so, how soon?