Right now Ryzen 3000 CPUs support 24 PCIE lanes - 16 for the GPU, 4 for a NVME drive, and 4 for everything else. That seems too low for for the enthusiast sector, so I'm wondering if the Ryzen 4000 CPUs will support more? A boost to 36 (16 for the GPU, 8 for two NVME drives, 4 for 10 Gb ethernet, and 8 for everything else) would work wonders. This would still leave Threadripper as the premium HEDT product with 88 (never mind Epyc's 128 lanes). This would also allow better product differentiation with the B650 boards supporting the basic 24 lanes and the X670 boards enabling 36.
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Will Ryzen 4000 CPUs have more PCIE lanes?
Yes. But that can be fully used, as the PS5 demonstrates.
Only the Epyc ones.
I think it would be pretty high, actually, if they were available. Remember that we're discussing the enthusiast market here, not the ordinary market, for whom I agree 16+4 is sufficient.
How do you know that the Ryzen 4000 series doesn't aupport more lanes?
Not with the B550 or X570 chipsets, you can't; only Threadripper and Epyc. The RX 5700 is already bandwidth-limited by PCIe3.
Except that we have PCIe4 NVME drives and PCIe4 GPUs so you cannot halve those numbers.
I thought the second 16 on x570 were from the PCH, not the CPU, and the PCH communicates to the CPU via a x4 link so it's really x4.were
From the specifications page:
They're bifurcating the x16 GPU slot and using 8 channels from the PCH.
And? I looked at that (p. 1-6) before responding to you.
In my OP I suggest that this be a differentiator between B650 and X670 motherboards.
Intel CPUs have managed it.
And how much performance do you think the RTX 3000 GPUs will lose? And Sony have shown us the benefits of full PCIE v4 bandwidth with the PS5.
It can be after you process the data. You're not streaming straight from the NVME drive to the GPU; you're doing it via the CPU. Processing is involved. Note that Sony did a comparison with PCIe v3 and that fell way behind.