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It's not clear to me from TFA: Do any existing AM4 mobos / chipsets have support for full PCIe 4.0 bandwith (64Gbps)? Or will the existing mobos be limited to
by jaytaylor 7y ago
It's not clear to me from TFA:
Do any existing AM4 mobos / chipsets have support for full PCIe 4.0 bandwith (64Gbps)?
Or will the existing mobos be limited to PCIe 3.0 (~5-6Gbps)?
All of the five processors will
be PCIe 4.0 enabled, and while
they are being accompanied by
the new X570 chipset launch,
they still use the same AM4
socket, meaning some AMD 300
and 400- series motherboards can
still be used.
I was just reading about PCIe 4.0 and 5.0 yesterday [0], and some quick research indicates only a week ago it was announced some current AMD boards do support PCIe 4.0 [1].
Would be awesome because the rate when transferring terabytes across SSD RAID arrays will see a 3-10x increase from ~500-600MBps to ~1.5-6GBps+. Fantastic!
[0] https://videocardz.com/review/pci-express-riser-extender-test https://videocardz.com/review/pci-express-riser-extender-tes...
[1] https://www.pcgamesn.com/amd/400-series-pci-4-0-bandwidth-bios-support-ryzen-3000 https://www.pcgamesn.com/amd/400-series-pci-4-0-bandwidth-bi...
- wtallis 7y agoExisting 300 and 400 series boards may be able to operate at PCIe 4 speed for the CPU-provided lanes (as opposed to the ones routed through the chipset that you can't upgrade), however signal integrity issues may limit this to just the slot closest to the CPU. So far, I haven't heard about any particular boards that have been validated for a specific number of slots working at gen4 speeds. Whatever you're using for an SSD RAID array will probably get in the way of using gen4 speeds, since you likely won't be able to get gen4 speeds over any cables or risers without redriver chips.