Well, if it was me and I had your system (sig) I would immediately move to 2GB. I would not move to 4GB of ram and at this time I would not purchase a dual core as I am awaiting Conroe for my wife's (LOL) next upgrade. She needs to scroll through her Excel faster I keep telling her
As I said to you last night there is little point in switching from a higher clocked single core to a slower clocked dual core.
Plus there are still only a handful of applications that can fully use the processing power of SMP.
I would recommend increasing your memory to a total of 2GB and also purchasing either: A Creative XFi or water cooling.
Increased cache does help but the increase in temperature is very high and thus would require a better heatsink for heat transfer.
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