Memory - DDR2

After selecting the CPU and motherboard, the next big thing will be memory. Currently, the DDR2 memory will be the best choice and 1GB will be the minimum. We can choose from DDR2-533 (PC2-4200) and DDR2-677 (PC2-5300). DDR2-533 is slightly cheaper. Although you may not feel the difference if you don't play games and editing video, theoretically DDR2-677 will have much greater performance increase over DDR2-533. Here are a few Crucial memory for your information:

• Crucial 1GB DDR2 PC2-4200 (DDR2-533) Memory
  
• Crucial 1GB DDR2 PC2-5300 (DDR2-677) Memory
  
• Crucial 2GB (2x1GB) DDR2 PC2-5300 (DDR2-677) Memory Kit

I personally recommend the 2GB DDR2-677 memory kit. 2GB will give you enough performance and room for the future. And the price is the best at the moment.