Dual channel DDR400 running at DDR200 when paired with 2-512MB and 2-1GB sticks. Same speed and brand...help!

Question

I'm just wondering as to why it isn't running in DDR400 speed being that they are all of the same speed and brand. CPU-Z says that they are in dual channel and that they are running at 200 MHZ

Thank you for your answers. I currently have them in 1-512-1-512. If I do them in 1-1-512-512 then it will recognize it as single channel. When I run 1gb-nothing-1gb-nothing it reports Dual Channel @ 400. I'm guessing that because they're difference CAS Latencies that it is throwing it off. Pretty much I have to choose between 3 GB dual channel @ 333, or 2 GB dual channel @ 400...not quite sure which is better being that I use Adobe Photoshop and that is a memory HOG.

Answer 1

maybe your motherboard only supports up to 200Mhz?????

Answer 2

have you tried to pair a 1 to a 512
the asus MB that I have has to primary ports and to slave set up in this pattern

P:S P:S
1:512 1:512

When I have a gig in the primary and the 512 in the slave it runs faster up.
I know they say that it should work that way but it does for mine. I guess try that.

If not then you need to have the gigs on one set and the 512's on the other

P:S P:S
1:1 512:512