>32 or 64 bit? If 32 bit, it doesn't use more than 3 Gb
>
>>I've got 4 Gb and rarely go over 50% usage - so I think I'm comfortable
>>
>>The problem is disk I/O. Is it Vista or my disk ? Dunno but I suspect Vista. Next time I'll go for a 7200 rpm but that only improves the search time

Vista is 32 bit - the processor 64 I think

I have now 1230 Mb of 3325 Mb in use - about 37%

I'm aware of the fact that I can only use 3300+ Mb of the 4096 Mb