I have an older Dell Optiplex GX270 upgraded to 4 Gb RAM, and 3GHz CPU. Memory in Win XP shows up as 3.9 GB as expected. I installed a 256MB nVidia GeForce 6200 PCI graphics card and system memory drops to 2.6 MB. The onboard display has 96 MB of RAM. Would I be better off without the nVidia card and stick with the stock onboard video adapter if want to edit videos with multiple camera angles? Or should I just deal with the loss of RAM?
the loss of ram is due to the limitation of 4GB with a 32 bit OS. This memory cap will include memory from the video card. I'm not sure if you can do it in the drivers but I was reading somewhere you can use a tool like Rivatune to disable turbocache. To be honest, I am not sure why turbocache would allocate so much system memory. Try using CPUID or go into the bios to determine if all your memory sticks are recognized.
Switching to a 64 bit OS will give you access to all system memory (minus the allocation from Turbocache).