Thanks Jofm5,
done that now. It misidentifies the motherboard, same as Belarc, says I have an Award board with three slots. however, I looked at the MB and it is a Jetway A689DAS, so put that into site and it tells me I can use DDR400, but should use it in matched pairs. So I will get another 512Mb DDR400 and install that with the one I have. This will no doubt lead to an astounding (for me) increase in speed, agility, and general all round Vroom!
Thanks Very much for the help.
Regards,
TT