I have a msi motherboard MS-6738. I recently purchased a 1 GB memory stick (ram) for the board. It is a ddr but the board takes both ddr and sdr both not a the same time. The manual says it takes either double sided or single sided. Each bank is 64mb to 1 GB. When I put the stick in though it only is showing 512 mb or around have. Something like that. Anyone have any ideas why it wouldnt read the gig?