Well. We have a Si 2654 with Windows Vista HP and 4096 mb of physical memory. But in the Task Manager shows available physical memory only 3031 MB. And system inform indicates that the 4096 mb of memory is ok. I think that 1 GB graphics card is picked up, but why so many? Indeed, the selection of video should be dynamic. So where did he go all the same 1 GB of physical memory?