All the ram has to be the same size for it to be dual channel right?

[MBrown]

2x1GB and 2x512MB cannot be ran in dual channel configuration to make 3GB, correct?

 

[Denithor]

That will work fine in dual channel as long as you put the ram in the corresponding sockets.

If you already have 2x512MB go for the additional 2x1GB upgrade.

If you have 2x1GB just spend a couple of dollars more and get 2x1GB instead of 2x512MB, there's very little difference in cost.

If this is a new build, just go for 2x2GB (can be as cheap as $70 for a pair of 2GB DDR2-800 sticks).

XP will only see/use 3.2GB but it will run nice and smooth and you will be ready for a 64-bit OS if you decide to upgrade.

 

[MBrown]

Originally posted by: Denithor
That will work fine in dual channel as long as you put the ram in the corresponding sockets.

If you already have 2x512MB go for the additional 2x1GB upgrade.

If you have 2x1GB just spend a couple of dollars more and get 2x1GB instead of 2x512MB, there's very little difference in cost.

If this is a new build, just go for 2x2GB (can be as cheap as $70 for a pair of 2GB DDR2-800 sticks).

XP will only see/use 3.2GB but it will run nice and smooth and you will be ready for a 64-bit OS if you decide to upgrade.

Im not building anything. I already have 2x1GB. I was just curious.

 

[MegaVovaN]

3 gb dual channel IS possible.

your 2x1 gb will be one dual channel and 2x512 will be other.

Install would be like this:
1gb - 512 - 1gb - 512

All ram will run at the speed of slowest RAM stick (if your 512 mb is slow, and 2x1 gb is $300 set, everything will run slow).

 

[renethx]

If your mb is Intel chipset, then you can add 1x1GB and 2GB is still in dual channel mode (Intel Flex Memory Technology).

http://www.tomshw.it/motherboa...619&page=socket_775-27