PCIe 6.0 spec announced with 256GB/s transfer speeds, twice that of 5.0


TechSpot Staff
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Motherboard manufactures will have lots of hardware added to their pipeline as PCIe 6.0 specifications were announced yesterday at the PCI-SIG Developers Conference 2019. The successor to PCIe 5.0 revealed last month looks to double transfer speeds with 256GB/s transfers. This quadruples the speed of PCIe 4.0 hardware that's just started to make its way to consumers.

Given its history, the industry standard usually takes around a year between its announcement and market availability of supported hardware. With PCIe 5.0 unlikely to arrive until 2020 at the earliest, the consortium expects PCIe 6.0 to finalize by 2021 after which consumers can expect to see supported hardware in 2022 or 2023.

"Continuing the trend we set with the PCIe 5.0 specification, the PCIe 6.0 specification is on a fast timeline,” said Al Yanes, PCI-SIG Chairman and President. "Due to the continued commitment of our member companies, we are on pace to double the bandwidth yet again in a time frame that will meet industry demand for throughput."

The PCIe 6.0 spec is targeted at evolving industry needs which will greatly benefit AI accelerated applications, NVMe storage and of course, GPUs.

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TS Booster
So even by the time PCIe 4.0 comes around to graphics cards, does this mean most eGPU setups will be bottlenecked by Thunderbolts 40GB/s?


TS Evangelist
Did somebody just wake up at PCI-SIG?

So why even bother with PCI 5.0 then, when nobody is developing for it yet anyhow?
Maybe because they seen this coming, and will just jump 5.0 and straight to 6.0? Who knows at this point...
Let's hope so. Introducing PCI-e 5.0 with the 6.0 spec official seems to me like it would just be milking consumers. It sounds kind of like the baby steps in HDMI 2.X and then the giant leap for HDMI 2.1. I, as a consumer for one, am rather tired of playing the keep up with the technology game.


TS Booster
So even by the time PCIe 4.0 comes around to graphics cards, does this mean most eGPU setups will be bottlenecked by Thunderbolts 40GB/s?
and/or thunderbolt will be faster as well. But no external ports are as fast as internal PCIe now, so unless that changes, even speed increases won't keep pace.
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TS Evangelist
PCIE 4.0 is being shunned and it's barely on the market lol
While PCIE 5.0 is still a year away at the earliest, I doubt many manufacturers will even use it if PCIE 6.0 is ready sooner or simply only a year out after 5.0 hits mainstream.
So even by the time PCIe 4.0 comes around to graphics cards, does this mean most eGPU setups will be bottlenecked by Thunderbolts 40GB/s?
eGPUs are already bottlenecked by TB3's 40GB/s. Not all the time, not in all uses, but the bottleneck (and the protocol overhead) do slow down eGPUs a bit. I gamed with one for a while and then built a PC around the card, which then performed faster. But I also moved from a 2C4T to a 6C6T so not apples-to-apples.

Actually now that I have 3 GPUs I can test with, and still have the eGPU box, I've been trying to make an apples-to-apples test but the CPU hardware for my setups just doesn't match closely enough yet.


TS Guru
Staff member
This kind of announcement structure (I.e. seemingly decreasing periods of time between the agreement of newer design specifications) isn't unprecedented. GDDR standards have been a bit like this too:

GDDR2 ~ 2002/2003
GDDR3 ~ 2003/2004
GDDR4 ~ 2006 ish
GDDR5 ~ 2007/2008 ish
GDDR5X ~ 2016
GDDR6 ~ 2017

As soon as GDDR2 entered the market, GDDR3 was getting ready for release; same with GDDR5X and GDDR6. It's worth noting that not all PCI Express interfaces within a motherboard technically have to follow the same specification - in theory, one could have the CPU-SB link as PCIe6.0 but the main PCIe lanes could be 5.0


TS Booster
I really dont understand why the tech industry announces things so early. pcie 4 isnt even out yet. let alone 5. let alone 6. thats literally too far in the future to care about. its like an infant thinking about retirment.
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When PCIe4.0 is just coming out and PCIe5.0 isn't yet, why plan PCIe6.0 this early? It's not like anything is saturating even PCIe3.0 yet. What's the point?
Maybe more lanes for x4 SSDs? Those are the only things that saturate their PCIe3.0 lanes I can think of, and then only if you get a good one. I don't know why there weren't x8 SSDs, though that does "waste" a lot of direct CPU lanes. Maybe for Intel and AMD to design their 2022 CPU line to use PCIe6.0 lanes for those super-hi performance SSDs?


Hold my beer....watch me skip PCI 4.0
Evidently, couple weeks ago, Chinese, Russians and others suddenly discovered for themselves the meaning of phrase "hold my beer", and now entire YouTube is flooded with it in every second comment. I cannot stand it anymore. This is so dumb now! Puke! :p

They really do know how to take something good from English, and f-k it up for good, so people don't want to use it ever again.
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TS Booster
So why not coperate to gather and get all pcie 1.0-6.0 on a motherboard. prototype o.c
ddr5-7 in that time.
*gta 6 needs more bandwidth when its on 8k-16k textures.
*cad adobe photoshop programs. so games we know has low fps would now run 110%-600% more fps.
only with 4.0 version you get more fps in all programs games windows 10 must be patched up .
or maybe windows 128bit would be the new one in 20xx.