Can I mix 1GB and 2GB sticks of ram in the same machine?

I have 8 slots for ram on my motherboard. They are in pairs to take advantage of dual channel memory. Right now, I have 2 1GB sticks of ram, and I'd like to add 2 2GB sticks of ram for a total of 6GB. Is mixing the different sizes of ram going to cause any problems?

Solution 1:

No, it won't cause the world to implode, or any problems for that matter. Make sure the 2x1GB and the 2x2GB are installed in corresponding banks to enable dual-channel memory mode.

Solution 2:

Yes you can, but personally, I wouldn't.

Ram is so cheap now, you should just dump the 1GB sticks and get another 2x 2GB.

Even if it will work, it is always better (for speed, performance and reliability) to have all matching memory.

Solution 3:

It'll probably work, but the only way to know is to check your mobo manual (or try it). Most mobos let you do that, but I've run across a handful that won't.