I have a windows 7 64bit os and i just bought four gigabytes of ram and on the bios and it the properties only 2gb of it is showing I've tried the ms-config fix and the memory remapping fix to. I've also tested both sticks of ram with an old 1gb stick of ram i had and 3gb's of ram showed up each time i did that I'm very confused and need help. Here is the link to the ram i bought
http://www.walmart.com/ip/Wintec-Value-4GB-DDR2-800MHz-PC64000-DIMM-Desktop-Memory-Kit-4GB-2x2GB/15074304
http://www.walmart.com/ip/Wintec-Value-4GB-DDR2-800MHz-PC64000-DIMM-Desktop-Memory-Kit-4GB-2x2GB/15074304