Yes I did clean the modules' contacts, as I said, but only with cleaning solvent on a cotton bud.
Perhaps I'll try the rubber eraser method next time I've got the covers off the machine.
The DIMMs do have some sort of metal heatsinks on them.
These are the original 1GB DIMMs that came with the motherboard, but the present 4GB ones look physically the same.
When they say "hot surface" they're not kidding!
Just going ahead a bit now, and sorry this is probably now not in the right forum, but I'm starting to think about my 64 bit OS installation, which was the whole point of the motherboard upgrade.
I ran the MS Windows 8 compatibility checker, and it said that my processors "might" not support NX, which I gather is a malicious code execution prevention technology. If they don't, Windows 8/8.1 will not install.
According to the Sysinternals CoreInfo utility, my processors do support NX!
The MS utility says they don't or it's disabled in the BIOS, but there is no BIOS option for it that I can see.
I will obviously ask Supermicro about this, but I'm now worried that I could pay out for a full 64 bit install of Windows 8.1 Pro, only to find that it refuses to install! Windows 7 will be fine, but I'm still tempted to go for 8.1, simply because it is the most up to date OS, which I'll get the longest support for.
Edited by Dave-H, 20 October 2014 - 11:34 AM.