Thank you for contacting the Intel® Communities.
The maximum amout of RAM that you could get in this Motherboard would be: 8 GB
The memory types supported would be DDR2 667/800 non ECC any memory within those specs should work properly.
Regarding the memory channel configuration, my recommendation would be to check the link below, page 36, there you would be able to find a diagram with the memory configurations to achieve the dual channel configuration.
Ok thanks, I have given up on the 533 Mhz. I assumed all variants of DDR2 were compatible even though intel doesn't say so.
Now, to the 667 I have. 2 sticks 1GB a piece.
I can only seem to put the sticks in DIMM 1 (channel A and B)
I get 3 beeps if I move them to the blue slots (DIMM 2). Would that mean the ram slots are faulty?