Tested each memory module in DDR1 slot for at least 20 hours.
Tested each slot with the 512MB module for another 20 hours. Should I have used the 1GB module for this?
So it appears that each memory module works fine if it's the only module installed - in whatever slot.
I found this helpfull guide for using Memtest86+:
http://www.overclockers.com/forums/showthread.php?t=409152
Memtest86+ website: http://www.memtest.org/
Memtest86+ Forum: http://forum.canardpc.com/forumdisplay.php?f=73
Cannot find a mailing list though.
My machine has been known to freeze on occassions, which I put down to software issues while running Fedora.
The 2 1GB memory modules are 1 low density and 1 high density. Both are PC2100.
They work fine on their own, but don't want to work together.
I'm now running Memtest no. 5 using the 1GB low density module, and the 512MB module, which is also low density.
I have put a digital multimeter on the power supply, and overnight while testing it registers ~ 4.97 - 4.98 volts on the 5vdc line, with a stable reading. ie it changes slowly between those 2 values. So it looks like the PSU is fine.
I have a sneaking suspicion that it's the mismatched low and high density memory modules that are the problem?
Kind Regards,
Keith Roberts