At such resolution, it should take around 30 MB VRAM, but I'm not sure what nVidia surround is. If it is several displays where each one has 3240x1920 then you need to multiply standard memory usage by the number of displays. EDIT: when the VRAM usage goes high again, could you create minidump and upload it? I will check whether the resource manager does not allocate some unnecessary resources. Okay, will do. It's 3 1920*1080 monitors in portrait by the way Edit: a dump of aerohost or dwm? the dwm one is quite large (4GB) Also, it seems to allocate more vram each time I vertically resize a window. Here's the aerohost one: https://db.tt/nLU0YLOr