We Test PCIe 4.0 Storage: The AnandTech 2021 SSD Benchmark Suite

Re:We Test PCIe 4.0 Storage: The AnandTech 2021 SSD Benchmar... by liampatterson on Monday February 01, 2021 @10:40PM (#25997223)

Just curious for my own sake—is there a board out there with two electrically PCIe 4.0 x16 slots? I was under the impression that Ryzen Zen 3 has just 24 PCIe lanes, and usually four are split out for the chipset, so how could you run both your x16 video card and x16 M.2 carrier simultaneously without linking one at a lower rate?

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Re:We Test PCIe 4.0 Storage: The AnandTech 2021 SSD Benchmar... by numpad0 on Tuesday February 02, 2021 @03:14AM (#25998443)

Yes yes yes this you're absolutely right. Virtually every motherboards has two "x16" slots but only the first x16 is actually x16, one on the far side from CPU is electrically just x4 and is mutually exclusive with first M.2 slot. Unless you're building Threadripper/EPYC or Xeon HEDT/server. I didn't realize any of that and am enjoying free salt.

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Re:We Test PCIe 4.0 Storage: The AnandTech 2021 SSD Benchmar... by Dylan16807 on Wednesday February 03, 2021 @03:20PM (#26018597)

It's not quite that bad. Lots of motherboards connect the primary x16 to two slots, which can either be used as x16+empty or x8+x8. And x8 is quite a lot at 4.0 speeds.

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Re:We Test PCIe 4.0 Storage: The AnandTech 2021 SSD Benchmar... by glandium on Tuesday February 02, 2021 @02:34AM (#25998247)

Threadripper has 64 lanes (except 3990x, which has 88), and I think most motherboard for it have 2 PCIe 4.0 x16 slots. EPYC has even more lanes.

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