New
#11
DDR memory can be expensive now, because it isn't in high demand or supply. I don't know if this is against the rules, but I have some high performance DDR400 memory I am looking to sell or trade. If you post your motherboard, I'll find out if anything I have will work for you.
And yes, you'll see a HUGE difference going from 512 MB to anything! I still have to support some laptops at work running XP with 1 GB of system memory, and they are painful to use.