PC Stats tries to find the sweet spot for RAM on Vista.  Trying 512MB, 1, 2 and 4GB they see just what you can get away with, and if the 4GB helps you out.  Gaming and productivity software will start to respond a lot better if you can keep Vista happy.

"Do you need as much memory when you're running office applications as you do when you're gaming? How much memory do

you need in Vista to game comfortably, and spreadsheet smoothly? Usually a hardware upgrade isn't required for a new

operating system. Yet if you are planing to upgrade Microsoft Windows XP to Microsoft Windows Vista, it's almost

impossible to avoid a PC overhaul. If the PC doesn't have enough RAM to satisfy Vista's intense thirst, you'll be

the slowest thing on two wheels."

Here are some more Memory articles from around the web:

  
Memory

• Winchip DDR2 1200MHz PC2-9600 2GB RAM Kit @ Benchmark Reviews
• Corsair DOMINATOR

  Twin3X2048-1800C7DF G @ Legion Hardware

• Kingston 2GB HyperX

  DDR3-1375 CL7 @ Techgage

• DDR2 Memory Roundup Summer 2007

  Part 1 @ Madshrimps

• OCZ DDR2 PC2-6400 CL 3 FlexXLC Edition 2GB Kit @ Overclock3d
• Crucial Ballistix Tracer DDR2-800 2GB Memory Kit @ TheTechLounge
• CoolIT Ram Fan Memory Cooler Review

  @ Tweaknews