I have had this problem for a while now. My system, Alienware Aurora ALX (2009...purchased in 2010), originally with Windows 7 Pro, 64bit installed, now upgraded to Windows 10 Pro, 64bit, doesn't allow memory remapping in the BIOS. I have 12GB of RAM installed, but the Nvidia GTX 650 1GB card (ddr5) has 4GB allotted in System Reserved memory for some reason. This problem started under Windows 7 Pro. I have never had a graphic card eat up this much System Reserved and it is unfortunately, affecting the over-all performance of my system. Is there a fix for this? Have never known a 1GB card to allocate this much before. Any advice or suggestions would be appreciated. Thanks.