asrock 939 dual vsta dual channel question

[jswjimmy]

can it run dual channel with 2 256mb sticks in one bank and 1 512mb in the other. im upgrading from a nforce 2 system where it works fine.
http://valid.x86-secret.com/show_oc.php?id=69206

if not i can trade my 256s for a 512 no big deal its just the 2 256s and 512 will run at up to 216mhz cas2.5 where the other 512 can only do 200 cas3 so if i can i would like to keep them.

 

[aelfwyne]

You'll need to have an even number of sticks for dual channel. Either 2 or 4. I'm not even sure if it will run with 3, many boards require 1,2 or 4 as a configuration (with 1 obviously not being dual channel)...