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Does any processor actually support enough PCIe lanes to do 16 TB ports?
by wlesieutre 10y ago
Does any processor actually support enough PCIe lanes to do 16 TB ports?
- jsheard 10y ago16 TB3 ports would require 64 PCIe 3.0 lanes, and Intel's biggest Xeons only have 40 lanes for the entire system.
- simcop2387 10y agoThe chipset can add more also, but they will have higher latency. It's common on lower end systems where the CPU only has 16 or so. Those'll go to the graphics card slot (the only 16x on the small board) and all other peripherals will come off the chipset's PCIe lanes.
- jsheard 10y agoThat's true, but the C612/X99 chipsets that pair with Broadwell-EP CPUs only provide an extra 8 PCIe 2.0 lanes. It's still nowhere near enough bandwidth to do what this concept wants to do.
- simcop2387 10y agoDefinitely. They'd have to develop something entirely new to do it, which I bet would cost more than just doing a quad socketed system to get all the lanes.
- virtuallynathan 10y agoYou would need a dual CPU system. Skylake Xeons have 48x PCIe. 16x TB3 = 64x PCIe Lanes 2x GPU = 32x PCIe Lanes 2x M.2 = 8x PCIe Lanes Chipset = 8x PCIe Lanes Would be too much for even 2x Skylake Xeons. Maybe 10-12x TB3 ports.
- seanp2k2 10y agoYeah, you'd need to get into 7-series Xeons or whatever AMDs new Zen server chips are (not sure if they do 4-way or how many PCI-E lanes they have).
- chx 10y agoKaby Lake desktop have upped the number of PCIe lanes by 20% if the Xeons do the same then you just about have enough -- your list above is 112 lanes, 48*1.2=57.6 and so 56 is not unreasonable.