Firstly a big hello to all at MDL. I am very glad to be back after my painfull bad bios flash. It cost me a new mobo but on the bright side i am rid of my awfull OEM board at last. Anyway to the point. I installed my new board and everything is great but when i go to system properties in win7 it tells me i have 3gb of RAM but 2gb useable. I have checked Resmon and it tells me that i have 1gb being reserved for hardware, however im not using onboard vga or anything as i have a PCIE card installed. I have tried numerous memory configs but keep coming up with the same result. RAM config as follows: DIMM 1 =1GB double sided module DIMM 2 = 512MB single sided module DIMM 3 =1GB double sided module DIMM 4 = 512MB single sided module. Mobo is a Gigabyte EG41MF-US2H...........any thoughts or help appreciated.