Intel Starts Publishing Open-Source Linux Driver Code For Discrete GPUs (phoronix.com)
fstack writes: Intel is still a year out from releasing their first discrete graphics processors, but the company has begun publishing their open-source Linux GPU driver code. This week they began by publishing patches on top of their existing Intel Linux driver for supporting device local memory for dedicated video memory as part of their restructuring effort to support discrete graphics cards. Intel later confirmed this is the start of their open-source driver support for discrete graphics solutions. They have also begun working on Linux driver support for Adaptive-Sync and better reset recovery.
They already use ram for additional storage, but the problem still exists because the speed of data transfer across the bus between the CPU and the GPU are still the limiting factor. Also the VRAM is tuned purely for the GPU, and is significantly more efficient even if you could stick a standard dimm slot onto the graphics card right next to the GPU.