I'm putting together a PC built around a Gigabyte GA 945P S3 motherboard and Intel's Core 2 Duo E6400 processor. I'm wondering what the best choice of RAM is - I want to get 2x 1GB DDR2 DIMMs. Choices are DDR2 533, 667 or 800? DDR 800 is rather pricey, which leaves 533 and 667. What's the best make/model for my proc/mobo combination?
If you check out the E6400 overclocking article here on Tom's Hardware, they made it about half way (I think it was 2.6 or 2.7 Ghz?) through their overclocking before they surpassed the 667 Mhz DDR2 RAM.
You won't get as much out of your current CPU without the 800 Mhz RAM (you can get a pair 512 sticks for about $140 on NewEgg) but at the very least, the 667 Mhz DDR2 will give you some upgrade potential for a better CPU.