Re: First time ever building a PC will this work?
The CPU has a dual channel memory controller so you want to buy memory in sets of (2), as in, (2x1GB, 2x2GB or 2x4GB). However, you can also pair up the slots and run 2x(2x1GB), 2x(2x2GB) or 2x(2x4GB).
A (3x2GB) kit is designed for a CPU with a Triple Channel Memory Controller which is an Intel only feature at the moment (i7 900 series cpu). If you try to use a (3x2GB) kit with a AMD system you will end up operating in single channel mode because of a misconfiguration.
When your running 1600MHz memory your overclocking the Memory Controller, more or less. In todays modern world most people don't actually consider this "overclocking" thou in all reality it is. Most modern systems can handle this task with no problems but sometimes a few adjustments will need to be made for stable operation.