One pattern that has emerged is many of the performance problems come from VRAM no longer being carved out of main system RAM. The drivers now have to be carefu

One pattern that has emerged is many of the performance problems come from VRAM no longer being carved out of main system RAM. The drivers now have to be careful about which pool of memory they allocate from, and for CPU access to VRAM without ReBAR the access patterns matter a lot more than they used to.