
Did not take all that long to do, pulled the 12 core and installed the 18 core and it started first time. The only quirk is the OS is not recognising one of the 16 gig SIMMS so I am only getting 48 gig instead of the 64 gig. CPUZ recognises the 64 gig and the BIOS does the same so its probably in need of a new Intel Xeon driver set.
Did some basic benchmarking and it is faster, both in single core and multicore. Wind it up and it runs at just under 3.6 gig, the 18 cores really hoot for multicore work but the important thing is it still runs at about 50c on all cores during the benchmark so cooling is not a problem.
Tried another set of Intel drivers but no difference but set the BIOS to optimised settings and its peaking at between 3.6 and 3.8 gig which is very good for a Xeon which are basically server chips.
As far as the memory modules, I will have to pull them one at a time and see if one is suspect.
I thought someone would see the humour of Core Temp displaying 18 cores.