I'm using Vista Home Premium on a ASUS A8N-SLI DELUXE MOBO 2x 6600 GTX 128Mb PCI-E in SLi mode 2x 80Gig SATA 2 drives in Raid 0 mode 4x 1Gig matched pairs pc3200 memory from crutial AMD 939 64x2 4800 Pinnacle DC10plus, Motion-JPEG VideoIO Board
I have 2 problems: Bios reports 4 Gig of memory but Windows shows 2.65Gig I have the latest drivers fron nVidia but windows does not show any SLi stats ?
Your 4GB memory problem is because you are using the 32bit version of Vista. On a hardware level you do have 4GB of RAM as the BIOS reports it correctly. However the software side is due to a limitation from a 32bit environment.