hey all, I have an issue with some memory that has me stumped. Due to an upgrade, I had 4x1GB sticks of RAM spare, so I figured I'd put these into another machine of mine that currently only has 1 GB total. (It's a little ITX board for media playback) However, after putting the new RAM in, the machine won't boot Ubuntu reliably, and memtest+ on the Ubuntu install disc shows up lots of memory errors. The memory was also *extremely* hot when I removed it from the machine. I tried the memory in pairs of two matched sticks at a time. Returning the memory to original machine, it runs memtest+ with no errors. Is there some kind of memory incompatibility that I'm unaware of going on here? The specs: Machine A, working combination: Motherboard: Intel P35 chipset RAM: 4x 1GB of DDR2-800 Machine B, working combination: Motherboard: Zotac nForce 630i RAM: 2x 512MB of DDR2-667 The latter motherboard says it supports DDR2-800 memory. I moved the CPU over from machine A to B, but that didn't help. I was especially bothered by the RAM getting very hot - I'm pretty sure that's not normal - although that machine is in a very small case without brilliant ventilation. But it was hot after just a few minutes of run time. I wondered if you had any thoughts? Thanks, Toby