I'm on an emachines w3107 (onboard geforce 6100) and there is a BIOS option that lets me select 16-32-64-128mb framebuffer size. regardless of what setting I use, NVidia X server settings reports either 256mb (when i select 128) or 128mb (anything other setting). Is this accurate? Can it be configured to not steal my system RAM? When I set the framebuffer BIOS setting to 'disabled' the machine will not boot. What is the full story behind this?