BitBlt is done in DMA ram by the CPU, so it may be even worse than just a copy as there is likely a wait involved too to prevent shared access. Using DMA ram pr

BitBlt is done in DMA ram by the CPU, so it may be even worse than just a copy as there is likely a wait involved too to prevent shared access. Using DMA ram prohibits the GPU/Driver from doing optimizations on that ram that it could do if the buffer was in dedicated gpu-ram. This is why DX12 resources are generally always copied into non-shared buffers.