I need your expertise. I have (2 x 1GB) DDR2 800 Geil ram and i installed it to my mobo to make it dual channel, my mobo is Gigabyte GA-P35-DS3L by the way. It's been working for months then suddenly i heard beeps like 5 or maybe 6 times. I unseated all components and put it all back together and when i tried it again, the dual channel won't work anymore. What i did was i put the ram together and it is working fine but in single channel, when i tried splitting them together to make it dual, it won't boot. I tried installing the ram to the other two ram slot and it worked but only in single. In other words, it won't work if they are seated apart (dual) but will work if seated next to each other but in single channel. The ram slots have two colors, black and yellow. Please help, do i have a faulty mobo? or ram perhaps? I ordered a couple of the same ram and would like to have 4 gb. Please any input?