Originally Posted by Roadhog
You're missing a big issue here. Pcie bandwidth is NOTHING compared to what a CPU needs. Pcie 2.0, 8GB/s, and 3.0 still only 16GB/s. While the cpu to memory bandwidth is 64GB/s. You would be severely bandwidth starved with slot cpus.
Doesn't make it impossible. We're likely still thinking of the CPU itself residing on a PCB that fits into a slot. Why not the CPU itself plug into the slot- no additional PCB? Therefore the CPU itself connects directly to the mobo.
Of course, this would require the CPUs be designed differently, but still doable. Of course, not being an engineer I'll not be the one to overcome the bandwidth issue- I'm just confident it's fully possible.