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AMD Ryzen™ Processors: 5 Years Later
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Nice that AMD actually provides some concrete info in this video.
PCIe 5 and AM4 cooler compatibility for AM5. Nice. 3D V-cache in early 2022. Next gen mobile in early 2022. Focus on further power reduction. (There are some details in the video.) Further out: ML accelerators.ID: hgcz4e9ID: hge5fb1The video also discusses how AM4 started out with PCIE 3.0, so I wouldn't take it to necessarily mean that the first iteration of AM5 chipsets will support PCIE 5.0.
Even so, it's likely to be that only the top class (x-70 series or equivalent) of boards that have some 5.0 lanes for the first generation.
The situation of PCIE 4.0 vs 3.0 support on Zen2 vs Zen3 on X570 vs B550 quickly turns into needing to consult a big matrix to see what slots/ports have what bandwidth. It's almost as bad as the USB forum. I would hope they figure out something a bit more elegant for AM5. Even if it's as low-tech as requiring a certain color or icon to be put on certain slots / ports across their board partners, or at least require a consistent nomenclature with marketing names.
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The only interesting part, quote from Robert Hallock, Director of Technical Marketing
"In 2022, Ryzen will have a new platform, and some key ingredients like DDR5, PCI express gen 5, and cooler compatibility with existing socket AM4 coolers.
This industry moves in cycles. IP cycles, core cycles and they are all lining up for our next gen platform. So I've seen the rumors, you have too, saying that next gen platform will only have gen 4. No no no, it will have gen 5, because Ryzen has made a name for itself."
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So PCIe 5 for conumsers with AM5 & Zen 4? Hmmmmmmmm.
ID: hgd2wwrHe never said PCIe 5 for zen4.
ID: hgdwh8zhe said PCIe 5.0 for AM5, how else to interpret it?
ID: hge05m97:07 "in 2022, Ryzen will have a new platform and some key ingredients, so DDR5, PCI Express Gen 5, and cooler compatibility with existing socket AM4 cooler".
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Just had a watch. Thanks for posting.
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So 3D V-Cache for early 2022... guess my nephew is going to be waiting on his rig build for a little while longer. I currently rock a 5900x and was going to get one of the V-Cache chips (5900 or 5950) and give him my normal 5900x.
The PCIE 5.0 confirmed for AM5 is a nice thing to hear as well!
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CMIIW. So, x16 PCIe 5.0, bifurcate 2 lanes, and you'll basically get 2 x16 PCIe 4.0, right? This could, potentially, drive those multi-GPU user awah from HEDT platform into mainstream market.
ID: hgdwn0xThat's not how any of this works.
ID: hgdwqraIIRC, Even if bandwidth is not an issue, you can't split 1 lane into 2 without some expensive silicon on the motherboard, because there must be some chip that converts High bandwidth PCIe 5 signal into several PCIe 4 signals for it to work.
ID: hgel5d8Its not that expensive, the chip only costs around $15 in high volume
ID: hgdid11I said similar above.... But also all that bandwidth for more m.2.
ID: hge8s62Not bifurcating it you don't.
If you get a pci-e switch chip with >48 lanes that supports gen5, you could split those 16x gen5 lanes into 32 gen4 lanes - but that's not cheap, even if we get a 'cheap' riser for it at some point, it'll still be $500+
ID: hgeewquIt's not impossible to do, but it's not easy as just splitting up the bandwidth like pumping two smaller water hoses into a bigger water hose.
You basically have to take the signals of 16 PCIE 4.0 lanes, unpack the data from them, then reconstruct the data as PCIE 5.0 signals which will fit across 8 lanes.
For an analogy, say you have two 16 lane highways (32 total lanes) rated for 5 ton loads, but you built a new highway that rated for 10 ton loads. You might think, well, it's the same total amount of cargo, so we can just merge the 32 lanes into 16 lanes, badda bing badda boom!
But actually you would need to unload each of the 5 ton trucks and reload the cargo onto 10 on trucks. You end up with half as many trucks, so they need half as many lanes. But you have to have some work done in between, and it not an insignificant amount of work. You'd need some kind of active bridge.
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Some interesting info and a nice recap of Ryzen. I'm really wondering if it's possible to get our hands on some of that gear in the video, though. I really like the look of those coffee mugs. Then again, it looks like they took generic mugs and pasted 5 year stickers on them lol. It's mainly the shape that appeals to me.
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Pcie5 for home use... To me it sounds like a lot more useful to be able to bifurcate Lanes for graphics and more m.2 uses, rather than have x16 for just 1 gpu slot.... Aka, how much performance is lost going from pcie 4 to 3 in a x16 slot? Will it even matter because of the following comment?
Direct storage capability for games seems like enormous gains will be possible in load times.
Will having 2 x8 connections for mGPU possibilities actually show a bottleneck in anything for a home consumer?
Having more than 1 m.2 even if only gen 4, seems like a growing market need.
ID: hgdbi3wgames have 0 benefits, hdd, ssd or nvme why would direct storage make any diff
ID: hgeqabh"games have 0 benefits, hdd, ssd or nvme"
In 2021, doesn't mean that will always be the case.
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Awesome!
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So they're not jumping on the 12VO train?
ID: hgdyhdw12VO is about motherboards, AMD has nothing to do with it.
ID: hgefjyqI wouldn't say nothing, they do have some influnce. AMD creates a reference, and I assume they certify partner designs. But I don't see any reason they would use a heavy-hand over the board power.
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5 years later, great CPUs at Intel price levels.
引用元:https://www.reddit.com/r/Amd/comments/q6n3wl/amd_ryzen_processors_5_years_later/
PCIe 5.0 confirmed for AM5 is cool, addressing the rumors of 4.0 only especially.