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Paul Pedersen
FWIW, here are Vista's performance benchmarks on a new system, before and after upgrading RAM. This might help you decide what to expect if you upgrade.
System: Semprom 3200, 1.8 GHz, shared video memory, Vista Home Basic.
Item Before After
RAM 512 MB 2 GB
533 MHz 800 MHz
Processor 3.8 3.8
RAM 2.0 4.9
Graphics 3.8 5.1
Game graph 2.3 3.0
Disk 5.4 5.4
System: Semprom 3200, 1.8 GHz, shared video memory, Vista Home Basic.
Item Before After
RAM 512 MB 2 GB
533 MHz 800 MHz
Processor 3.8 3.8
RAM 2.0 4.9
Graphics 3.8 5.1
Game graph 2.3 3.0
Disk 5.4 5.4