x470 Taichi PCIE 4.0

I guess we will see after launch. If one manufacturer enables it, others will too but the key will be stability. If I were responsible for the decision I wouldn't enable it, better to have customers with stable systems than angry customers because it didn't work right. I have a sinking feeling it will probably be enabled on a number of boards, and likely cause problems

no support for pci 4.0 on x470 and earlier.

https://www.sweclockers.com/nyhet/27653-amd-klipper-pci-express-4-0-stod-for-aldre-moderkort-i-400-och-300-serien

To be honest I don't see this as a big deal. PCIe 4.0 does very little to help current PCIe add-in cards, even GPU's. IMO the main benefit at least in the medium term will be more bandwidth to the chipset, so that the chipset can feed more ports of all types without saturating the link back to the CPU. I'd be surprised if the X470 chipset has the ability to talk 4.0, or the excess capacity to make use of it.

(I suppose that PCIe 4.0 to NVMe SSD's is another potential benefit, and that would be nice, except that transfer time isn't the overwhelming majority of total time that it is in the HDD world.)

I have to be honest, I am not dissapointed that PCIe 4.0 will be restricted to 500 series chipset boards. AMD's track record hasn't been smooth as it is, throw in a new PCIe standard on boards that were not designed for it and you are asking for headaches. The key problem is that AMD don't design the boards and board partners can't predict what will be coming in a generation or 2. Don't get me wrong, AMD are doing a great job shaking up the market but they have teething problems to iron out. Intel have had a lot longer and a lot more budget to iron out their launch cycle. When you consider that Intel's architecture is largely unchanged since Sandy Bridge it becomes clear why AMD, on it's relatively new Zen platform, has some catching up to do.

PCIe 4.0 at present only benefits high bandwidth applications and as it stands, the only practical application is with storage. On the GPU front, PCIe 4.0 is overkill in the extreme right now in all but one way; a x1 PCIe 4.0 slot will be equivalent in bandwidth to an x4 PCIe 2.0 slot where it comes to bandwidth. In theory that could mean we might see SFF GPUs on x1 PCIe slots, all the way up to about the performance of a GTX 1650 before bandwidth bottlenecks make it impractical. If x2 slots (or at least x2 wired slots) become a thing that could go even further. Once we start seeing low tier 500 series chipsets I could see the SFF market exploding with options.

Yes I agree. After reading many threads on PCIE 3.0 with graphics cards, they barely even use all the bandwidth of PCIE 3.0, unless maybe with 2 GPUS running in SLI at 4K with say 2 RTX 2080ti's or higher. If your using 1 GPU now or in the future, we are all fine for I would guess maybe for 2-3 years more before we see games demand more bandwidth from PCIE. For now it's all about storage. I read that PCIE 4.0 can hit 5,000 MB/s. I'm more than fine with my 512GB 970 Pro. I get 3,566 MB/s read & 2,330 MB/s write. No point to upgrade for 1.5GB more bandwidth that would be a waste of $$. I'm happy I can just buy the 3800x and drop it in my x470 ^_^