I have a MSI 6390 MB w/ 256 2100 speed DDR ram. I bought another chip of\nthe same ram\nand installed the pc didn't recognize it. I returned and got another chip\nand had the same problem.\nI've tried running the new chip by itself and it worked fine. i tried\nswapping the slots for the chips and it still only recognizes 256. I\ndownloaded software (everest home) and it detects the second chip in the 2nd\ndimm slot but also shows the computer as only running 256 megs. Ive went\nthrought the mb manual and the motherboard is capable of having 2 gigs of\nram. I then thot about updatingthe bios drives but skimmed thru the updates\nand none of the newer ones had a mention of a problem or fix if detecting\nram.. Im hesitant to make that jump. Any ideas as to why my pc will not\nregister the 2nd chip ?\n\nThanks in advance.