The slides AMD showed on their events about the X570 showed on the left the Ryzen 3000 cpu. Which supports 4x USB 3.2 gen 2, x16 PCIe 4.0 for graphics, x4 for nvme and x4 as a connection to the chipset. All PCIe 4.0. Sofar nothing surprising.
But then the slide states “Pick one: 1x4 NVME OR 1x2 NVME + 2x SATA”. Now, hearing that Ryzen supports 24 PCIe 4.0 lanes all the time, this would mean 28. So I assumed this meant the x4 for NVME could be reconfigured for x2 plus SATA.
But Steve at Gamer’s Nexus in their latest video clearly states the Pick One option is additional to the 24 lanes. That seems wrong. I’m not even sure the AM4 socket has enough pins to support those extra 4 lanes.
So please comment on this, what’s with those extra x4 lanes?
Also, the slide states those x16 are for Graphics. If a motherboard splits these x8/x8 can you use one of those x8 for a RAID controller, or only for another graphics card? The information I could find about that is conflicting as well.
Please shed some light on this!