I got you, sorry i understand about you want virtual Machine (Virtual PC, VirtualBox, etc..) yeah need more memory oh well
RichardDeaf,.. you're a VMware crackhead.
I am not sure if you are familiar with Single and Duall Channel DDR slots, like DDR1, DDR2, DDR3, DDR4. Something that if you want to upgrade it to 8GB on a 2 or 4 slots, You'll need 4gb ddr stick each slots to make it 8gb.
Using 2GB DDR memory stick:
DDR1 + DDR3 slots = 4GB Single Channel
DDR1+DDR2 slots = 2GB Dual Channel
So If you have all 4 of 2GB sticks plugged in, It'll be like
DDR1 + DDR2 + DDR3 + DDR4 = 4GB Dual Channel
That's what I got from my AMD64 mobo with 4 memory slots It can go up to 4GB using 1GB DDR400 on all 4 slots or 2GB DDR400 on two slots.
My Gigabite 7VAX board do not have Dual Channels and it only limited 4 GB maximum using DDR333 1GB memory sticks, not DDR400
So it means you'll need 4 of 4GB memory stick to make it 8GB Dual Channel (budget breakers)
OR
2 of 4GB memory stick plugged on DDR1 + DDR3 slot make it 8GB Single Channel (Budget savers)
You can refer to your mobo's manual. I'm sure Dell XPS system DOES have Single and Dual Channels slots. It's common for all new mobo tho.
Single Channel and Dual Channel have some difference on speed. Gamers thought Dual Channel will make system go fast. I agree but not entirely. I've tried Dual Channel 512mb and ran XP and Linux. I noticed it runs kinda faster than Single Channel.
Make sense?
Catty