Probably thinking of this https://en.m.wikipedia.org/wiki/Heterogeneous_System_Architecture https://en.m.wikipedia.org/wiki/Heterogeneous_System_Archite... > E

Probably thinking of this https://en.m.wikipedia.org/wiki/Heterogeneous_System_Architecture https://en.m.wikipedia.org/wiki/Heterogeneous_System_Archite... > Even if it was dog slow between PCIe GPU and CPU the unified interface would have been the right way to go That is actually what happened. You can directly access pinned cpu memory over pcie on discrete gpus.