[Les]

DDR2 and DDR3 RAM are incompatible.

If you're using DDR2 RAM already, you have a DDR2 compatible motherboard that can use your DDR2 RAM, but not DDR3 RAM.

To know exactly what kind of extra DDR2 RAM you should get (you probably don't need more than 2GB per stick), we need to know how many RAM slots you have (probably four), and how many of them have RAM sticks in them already (probably two). We also need to know whether your operating system is 32-bit or 64-bit.

Without this information no-one can tell you what you should get, and if you yourself don't know this information you might get something that's not fully compatible with your system (it might make it run poorly or not run at all.)

Sorry if it sounds condescending, but your post suggests there are some important things you need to find out about it before updgrading your RAM. Just trying to help.

And yes, as jimbop said, if you're upgrading your RAM for CloDo then it's better to just wait and see where your system is most lacking anyway, as there may be no point upgrading any part of it. I just thought you wanted to get more RAM because you already knew you needed it for your current uses.