WEBVTT

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what if you had a 2 terabit per second link inside your home PC that's what's

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coming down the road with PCI Express 7.0 which will deliver 256 GB per second

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of bandwidth in One Direction on an x16

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link by contrast to the PCI Express 4.0

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slots that many of you have in your computers today only support an eighth

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of that but even those current speeds have no problem supporting the bandwidth

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needs of an RTX 4090 So What on earth do

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we need eight times as much for and how do they keep cramming more speed into

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those little slots anyway to start PCI Express 7.0 uses the same Pam 4

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signaling seam that was introduced with version 6.0 we explained it in a bit

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more detail in that video but long story short Pam 4 uses four voltage levels

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rather than two to encode data meaning it can send two bits per cycle instead

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of the usual one but if it uses the same encoding scheme how is it double the

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speed well the answer seems fairly straightforward a doubling of the

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frequency however when you're pushing that much data down the pipe at once

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maintaining good signal Integrity becomes a real challenge you can't just

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go around having errors left and right PCI Express 6.0 introduced some error

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correcting features alongside Pam 4 so that it would actually be you know

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usable but at the speeds PCIe 7.0 is

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trying to push manufacturers will likely have to make improvements to the actual

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physical layer this could take the form of anything from better materials like

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more robustly built pcbs to Optical

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solutions that offer better signal Integrity than copper in fact the PCI

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special interest group or PCI Sig an industry Association that's responsible

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for developing the PCI Express standard has already formed an optical workg

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group to make sure the PCI 7.0 spec as

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well as future revisions will actually be feasible this even includes using

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full-on cables instead of copper traces in some situations but why is there a

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need for that much bandwidth we'll tell

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you right after we thank the sponsor of this video delete me the pros at keeping

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on over to the video description to check out delete me today with high-end

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PCI Express 5.0 X4 ssds that you can

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actually go and buy right now you're already getting up to 16 GB per second

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of speed in One Direction and there's a good chance you already know even

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high-end modern graphics cards aren't suffering because current PCIe revisions

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on motherboards are fast enough to not cause bottlenecks this means that PCIe

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7.0 will initially be aimed more at data

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centers for example making 800 GB Ethernet more accessible is a major goal

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of the PCI Sig and it hopes to do this with PCIe 7.0 although you likely aren't

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going to be running Ethernet speeds of that magnitude in your home rig anytime

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soon connections that fast are going to become important for allowing data

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centers to support all the load we're putting on them with cloud and AI

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applications whether it's something straightforward like simply being being

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able to deliver tons of highres video at once or GPU frames for cloud gaming

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services or more complex stuff like AI for self-driving cars language

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processing or medical Diagnostics and Ethernet isn't the only connection type

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that PCIe 7.0 can help enable there's also a standard called compute express

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link or cxl which runs on top of the PCIe physical layer and can be used for

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a large number of use cases notably adding more RAM with the applications we

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mentioned demanding not just more speed but also more memory capacity cxl over

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PCIe 7.0 looks to become an easy way for data centers to significantly increase

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how much RAM they can fit into a server we likely won't see products featuring

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PCIe 7.0 until the latter part of the decade probably 2027 at the earliest and

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if you're waiting for a PCI 7 SSD to pop into your PC it will likely be even

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longer than that which is unfortunate for those of you who are very concerned

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about saving an extra second or two on load times in your favorite game but you

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know what that's a great time to pet the cat stop ignoring the cat it's a living

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being it needs love but I love that you

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watch this whole video thanks for that like the video if you liked it dislike

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it if you disliked it check out our video on PCI Express 6 comment below

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with video suggestions and don't forget to subscribe and follow it'll do

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yourself a favor