Mike Tomlinson wrote:
soup writes
you say you already have 3 GB
(probably made up of 1x1GB stick
and one 512MB stick (X2)
that's 2GB.

No it's 3GB.

Badly written I'll agree, but it is three, 1GB and 512MB =(roughly[1])
1.5GB, this times two is three GB. Four sticks (2x1GB and 2X512MB) in
four slots .
Manufacturers have a habit of making any upgrade as expensive as poss.

[1] Depends on your stance with this Gibibytes stuff and does 1GB = 10³
0r 2^10 KB