First X570 boards are released, all with three M.2 sockets each offering PCIe 4.0 x4 (64 Gbit/s). The specs are as follows: AsRock https://www.asrock.com/mb/compare.asp?Models=X570 Taichi,X570 Phantom Gaming X M2_1: SATA/PCIe x4 (CPU); M2_2: SATA/PCIe x4 (PCH); M2_3: PCIe x4 (PCH - disables the third PCIe x16 slot). Gigabyte https://www.aorus.com/X570-AORUS-XTREME-rev-10#pd_spec https://www.aorus.com/X570-AORUS-MASTER-rev-10#pd_spec M2A: SATA/PCIe x4 (CPU) M2B: SATA/PCIe x4 (PCH) M2C: SATA/PCIe x4 (PCH) Asus https://www.asus.com/Motherboards/ROG-Crosshair-VIII-Formula/specifications/ N/A MSI https://www.msi.com/Motherboard/MEG-X570-GODLIKE/Specification https://www.msi.com/Motherboard/MEG-X570-ACE/Specification N/A BIOSTAR Racing X570GT8 Colorful CVN X570 Gaming Pro

NewMaxx:

The reason they do this is to assist PCIe 3.0 x2 drives which are limited to 2 lanes

There are few such devices and they are quite slow too, so it would only help synthetic benchmarks.

DmitryKo:

Am I?

It wasn't referred to you

X570 PCH actually includes 16 (sixteen) downstream PCIe lanes, which add up to the 24 PCIe lanes on the CPU, with a total of 4 (four) 4-lane physical interfaces (4x PCIe 4.0 x4 PHY), fully configurable in PCIE x16, x8, x4, x2, x1, and SATA modes. The chip is a scaled-up version of EPYC/Threadripper 'Matisse' I/O die The uplink is still PCIe 4.0 x4 though, so the total bandwidth will be shared across all devices connected to the PCH lanes. https://www.planet3dnow.de/cms/47030-uebersicht-mainboards-mit-amds-x570-chipsatz/2/ https://www.planet3dnow.de/cms/wp-content/gallery/amd-x570-praesentation/AMD-X570-Computex_5.png https://www.planet3dnow.de/cms/wp-content/gallery/amd-x570-praesentation/AMD-X570-Computex_6.png https://www.planet3dnow.de/cms/wp-content/gallery/amd-x570-praesentation/AMD-X570-Computex_7.png https://www.planet3dnow.de/cms/wp-content/gallery/amd-x570-praesentation/AMD-X570-Computex_16.png

Alessio1989:

It wasn't referred to you

Actually it was...

DmitryKo:

There are few such devices and they are quite slow too, so it would only help synthetic benchmarks.

I didn't say it was a good idea, just that they do it and explaining their reasoning. The point was that you could switch if need be. But a bit of a moot point with regard to this thread as we see the downstream lanes are PCIe 4.0 without any compromises, the B550 might be a bit different of course and the chipset pays by needing a fan. Still, exciting for NVMe fans.

I wonder where does it put the Socket TR4 platform and the upcoming Ryzen Threadripper 3000 processors - since the X570 and the Ryzen 3000 offer 40 PCIe 4.0 lanes in total, allowing full-speed triple SLI and three NVMe SSD slots, the practical applications of the TR4 platform will be limited to a few specific tasks that can scale with additional cores and memory channels, such as 4K video editing, and very high-end systems that require 60+ PCIe lanes for things like quad SLI and NVMe RAID-5...

DmitryKo:

I wonder where does it put the Socket TR4 platform and the upcoming Ryzen Threadripper 3000 processors - since the X570 and the Ryzen 3000 offer 40 PCIe 4.0 lanes in total, allowing full-speed triple SLI and three NVMe SSD slots, the practical applications of the TR4 platform will be limited to a few specific tasks that can scale with additional cores and memory channels, such as 4K video editing, and very high-end systems that require 60+ PCIe lanes for things like quad SLI and NVMe RAID-5...

DmitryKo:

I wonder where does it put the Socket TR4 platform and the upcoming Ryzen Threadripper 3000 processors - since the X570 and the Ryzen 3000 offer 40 PCIe 4.0 lanes in total, allowing full-speed triple SLI and three NVMe SSD slots, the practical applications of the TR4 platform will be limited to a few specific tasks that can scale with additional cores and memory channels, such as 4K video editing, and very high-end systems that require 60+ PCIe lanes for things like quad SLI and NVMe RAID-5...

20 cores and higher.