:/ well I don't have a voltmeter handy... but...
Memtest86 (which I highly recommend btw) shows both RAM modules as OK, but hangs totally when they are in slots 1 and 3 (out of 3 DIMM slots). They are in 1 and 3 because I had the same problem when they were in 1 and 2, and moving them to 1 and 3 fixed it. I'll do a bit more swapping round to try and find a configuration to eek out the last bits of life out of that motherboard.
Sadly, the single RAM module, even though it is a hefty 256MB, isn't sufficient for my needs (regularly use up 3-400MB RAM), and you can imagine the slowdown on using an ATA33 for swap *blech*. (I do LARGE music and image manpulation, and also play games ;-) ).
I'm kinda loathe to buy a 512MB RAM module if I'm gonna end up replacing the whole lot anyway. It's just a matter of finding the money, especially as my car's MOT is coming up soon *boohoo*.
Oh, I noticed these new motherboards have ata133- is that supported by linux?