Hi i have a hp pro 3000mt it had 2 gbs of ram but for me and for most people that's not enough so I bought two 4gb memory cards exactly the same as the ones in there except these are 2 gbs each I've tried too just run one then I tried flashing the bios ( some people said that fixes the problem) and I tried buying others but it only works with the two 1 gbs. Any help?