Speed waits for no-one; PCIe 6 announced

[BachChain]

Source: https://www.tomshardware.com/news/pci-sig-pcie-6.0-256gbps-interface,39676.html

 

Despite PCIe gen 4 just now reaching mainstream and PCIe gen 5 being finalized only a few months ago, the PCI-SIG has announced they have begun working on gen 6.

 

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The new PCIe 6.0 interface double the Gigatransfer rate to 64 GT/s, which doubles effective bandwidth over PCIe 5.0 to 256 GB/s of throughput and retains the same maximum of 16 lanes. 

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The new PCIe 6.0 interface switches to PAM4 encoding from the NRZ 128b/130b encoding scheme used for PCIe 3.0, 4.0, and 5.0. The PAM4 encoding scheme is widely used in networking, so it is a known quantity that should be relatively easy to deploy. PAM4 uses forward error correction (FEC) to help boost transfer rates, and PCI-SIG also points to other unspecified mechanisms that will improve bandwidth efficiency. 

 

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The faster release of the PCIe 5.0 interface means PCI-SIG met its two-year goal of developing a newer revision of the spec, which is a welcome change after the seven-year wait for PCIe 4.0. The committee hopes to meet the same two-year cadence for the PCIe 6.0 interface and publish the specification in full in 2021, and if history holds true, we'll see devices arrive in 2022.

 

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As we've seen with all versions of the PCIe specification, PCIe 6.0 is backward compatible with the existing PCIe interfaces.

If x570 is anything to go on, then chipsets will soon need a nh-d15

[Drak3]

7 minutes ago, BachChain said:

chipsets will soon need a nh-d15

Nah, triple rad setup. Quad 140's and Gentle Typhoons, minimum.

[ravenshrike]

They'll all need 8 layer PCBs at a minimum.

[rawrdaysgoby]

Well soon motherboard makers will give up on Pci-e 4.0 and head to 6 LOL 

[star_pilot475]

8 minutes ago, rawrdaysgoby said:

Well soon motherboard makers will give up on Pci-e 4.0 and head to 6 LOL 

Lol ya, 5 will never even be mainstream.

[TrigrH]

how many times can they just keep doubling it? if its backwards compatible its probs still the same number of pins, something has to give right?

[Belgarathian]

5 minutes ago, TrigrH said:

how many times can they just keep doubling it? if its backwards compatible its probs still the same number of pins, something has to give right?

PCIe 6 will require optical pathways or for the tracers to be 2cm from the chipset/CPU

[S w a t s o n]

RAM on a fucking accelerator card here we come

[Guest]

But like Bluetooth, where we had 2.0 for a while, and then 3.0 and 2.0 LE (or whatnot, been a while), then suddenly 4.0 and 5.0 come out.

 

Time to use those decimal places!

[JoostinOnline]

1 minute ago, floofer said:

But like Bluetooth, where we had 2.0 for a while, and then 3.0 and 2.0 LE (or whatnot, been a while), then suddenly 4.0 and 5.0 come out.

 

Time to use those decimal places! 

It's not nearly as big a mess as USB.

[Taf the Ghost]

18 minutes ago, S w a t s o n said:

RAM on a fucking accelerator card here we come

Photonics. 

[S w a t s o n]

2 minutes ago, Taf the Ghost said:

Photonics. 

most likely, i just think it would be sick to have a card with a bunch of ddr4 as a sort of cache drive

[Salv8 (sam)]

2 hours ago, BachChain said:

64 GT/s

this is terabytes right?

cause to take full advantage of that it's going to be a awhile before anything can output that much...

[Dylanc1500]

21 minutes ago, Salv8 (sam) said:

this is terabytes right?

cause to take full advantage of that it's going to be a awhile before anything can output that much...

No, it's giga transfers per second. Ram is actually measured the same way. 3200, 3000, 2933, those are all mega transfers per second.

 

Unless this was an underhanded joke that I missed. In which case, my bad.

[sof006]

Jesus, I'm still on PCIE 3

[soldier_ph]

Lol, this reminds me of when Trump said that the development of 5G is too slow for him, he wants 6G now !

[Bananasplit_00]

34 minutes ago, sof006 said:

Jesus, I'm still on PCIE 3

It's already hard for normal computer enthusiasts to max out 3.0, but the main thing I'm looking forward too is using less lanes for the graphics card and everything. Not using 16 lanes but rather 8 or 4 is going to clear up a lot of PCIe to everything else if Intel and AMD don't fuck us by cutting lanes

[AlexGoesHigh]

34 minutes ago, sof006 said:

Jesus, I'm still on PCIE 3

lol, I'm still on sandy bridge which is pcie2...

[williamcll]

I wonder how well will USB catch up to this.

[Jito463]

2 hours ago, sof006 said:

I'm still on PCIE 3

Most everyone is.  x570 will be the first desktop boards with PCIe 4.0.

[paddy-stone]

Yes, I'd like to see the PCIe lanes being able to "split" more... so like, now we have pcie 4, see the NVME drives just use 2x lanes for example which should be the same bandwidth as 4x pcie 3 lanes. And so on... at least then we might be able to use most of the ports on the motherboard without having to sacrifice something.

[The King of the Undead]

17 minutes ago, Jito463 said:

Most everyone is.  x570 will be the first desktop boards with PCIe 4.0.

mortal! I am on pcie 2! Bow before your master and king!

[Doobeedoo]

It is great to see such rapit development of it especially considering it took longer in previous generations. 

[DeScruff]

I wonder if this means we will skip a generation, kinda like how GDDR4 was (mostly) skipped.

 

[Trixanity]

21 minutes ago, Sypran said:

I wonder if this means we will skip a generation, kinda like how GDDR4 was (mostly) skipped.

 

Doubtful. Intel will probably be jumping straight to gen 5 as soon as they can. It's also likely AMD will target it with their next socket/platform change.