When will motherboards and components that support PCIe 4.0 and 5.0 be available?

Hello, I read that PCIE 4.0 has been approved after long delays and PCIe5.0 is expected in 2018. When can we buy motherboards and components that support PCIe 4.0 and PCIe 5.0 respectively?

I am considering whether or not to spend the money to build powerful PC now or wait for PCIe 4.0 to come out. If I build a PC now and when these new motherboards come out, will I be able to use current RAM, NVm m2. SSD and power supply? By that time, will faster RAM and NVm m2. SSD that take advantage of PCIe 4.0/5.0 be available?
Reply to modeonoff
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More about motherboards components support pcie
  1. It's usually a year or 2 before it hits the shelves. So icelake would be my earliest guess. No point in pcie 5.0 speculation but the roadmap is 2019 not 18. Of course faster ssds will be out after a year. Current components should still be able to be used. Ddr5 isn't expected on the shelves til 2020. M.2 doesn't even have a replacement known and it's doubtful it's even thought about so soon. Atx isn't going anywhere.
    Reply to k1114
  2. Unless you plan on doing compute heavy tasks I don't see the average consumer benefiting from 4.0. let alone 5.0. From what I've heard 4.0 is mainly used in the server industry for AI and tasks needing a lot of parallel compute power.

    Modern video cards barely saturate a x8 3.0 slot and NVME use either a x4 or x8 3.0 slot.

    As for when. I'm not sure. Would be interesting to see how it would benefit the normal consumer or even an enthusiast.
    Reply to offroadguy56
  3. Thanks k1114. What do you mean by "a year or 2 before it hits the shelves". I read that PCIe 4.0 was supposed to be out 3 years ago. Then, it was expected to be out earlier this year and now Fall of this year. Is this firm or there could be further delay?

    I am considering to build a powerful computer for CUDA/GPU computing but I am dissatisfied by a lack of the latest CPU-motherboard that supports quad PCIe 3.0 16x16x16x16. If I could buy components to build a PCIe 4.0 system in, say about 4 months, I better save the money. Alternatively, just get a laptop or build a desktop which I could use some of the components in the PCIe 4.0 system. What suggestion do you have?

    Thanks offroadguy56. Yes, I plan to build the system to do computationally intensive AI research that require CUDA and multiple high-end GPUs.
    Reply to modeonoff
  4. Something "hits the shelves" when you can buy it at a store. It's already out so how can it be delayed more? It takes time for hardware manufacturers to implement the new specs, test, etc, and then hit mass production. There's never a timetable for that. The only answer is going to be time frames of past pcie releases and when we actually got components. That's 1-2 years.

    I don't think anyone can give you any suggestions other than you buy a pc when you need one. There isn't anything new coming out soon that will make a current component unusable and 1-2 years is quite a while to be talking about anything in more detail.
    Reply to k1114
  5. I thought when they said that PCIe-4 would be available by the end of this year, they meant the components. Thanks for the clarification.

    1. You mentioned that current components should be able to be used in the PCI-E 4.0 system, can current CPU such as the Threadripper be reused on the PCI-E 4.0 motherboard? I guess not but I want to reconfirm.

    2. If I build a system now, I plan to buy 64-128GB RAM. Given the expensive cost, I want to make sure that they will be compatible with the upcoming PCI-E 4.0 system. Given that DDR5 won't hit the shelf in 2020, does that mean the DDR4 RAM I buy now will be able to be used in PCI-E 4.0 motherboard without lost in performance? Do the RAM these days work for both Intel and AMD system? Could there be DDR4 RAM to be produced between now and the availability of PCI-E 4.0 motherboards that would give better performance than existing ones?

    3. Am I right that for sure, if I buy an ATX or EATX compatible case now, it surely will be compatible with the up-coming PCIe 4.0 motherboards? Shall I choose only EATX compatible case just on the safe side?

    4. As I recall, at least about 15 years ago, power supply needed to match whichever platform (Intel or AMD) was used. How about in recent years? If I buy a 1600-1800W power supply for a system to be built now (be it Intel or AMD), will I be able to use the same power supply for the PCIe 4.0 system? I don't know which company's CPU I will be using.
    Reply to modeonoff
  6. 1. There is no info whether they can or can't. It's too early to tell.

    2. Ram and pcie are not related. Ram of the same version ie ddr4, ddr3, etc., doesn't gain or lose performance when the specs are the same. Faster oc ram may come out but the performance gains are too small to be buying new ram. Ram is not platform specific. It really all comes from the same places. You'll see some instances where it'll say "for z270" or something like that but still works on amd perfectly fine. It's just marketing.

    3. Standards exist for a reason. Given you want 4 gpus, you probably do want eatx. You don't even need x16 on all gpus though. Gpu compute tasks take very little pcie bandwidth and doesn't even see a performance decrease on x1.

    4. Atx was the standard back then, still the standard now and will continue to be the standard.
    Reply to k1114
  7. Thanks. In regard to power supply, if I buy one now, can I use it on the PCIe 4.0 based motherboard? Is power supply platform independent? Can they be used for either Intel or AMD system?
    Reply to modeonoff
  8. All answered from #4 really but I can explain more. There is nothing that is platform specific besides socket, cpus, and chipsets which are all related and literally grouped intel vs amd. Nothing else is related like that and are independent standards and specs.
    Reply to k1114
  9. Thanks for the clarifications. I can recycle the RAM, power supply and case when PCIe 4.0 comes out then.

    As I recall, about 15 years ago, the power supplies were platform specific due to some connector. Don't recall clearly.
    Reply to modeonoff
  10. Everything except cpu and mobo.

    The common psus were still atx. Oems would use proprietary connectors as some still do now but it was a lot more common. Although it was their own pc series specific and not the necessarily the platform. Go farther back and there just wasn't a single widespread standard or multiple standards. It just isn't a concern for more than a decade now. We have standards that everyone uses that make things easier. If they use different things less people buy it and that's bad for business. There's been plenty of complaints about those few pcs that want to use proprietary connectors and the odd btx models.
    Reply to k1114
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