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AMD will support DDR5 and PCIe 5.0 in 2022, but Intel has DDR5 first

AMD will have next-gen CPUs and motherboards supporting the new DDR5 memory standard by 2022, but it will be Intel that is first-to-market with DDR5.

AMD will support DDR5 and PCIe 5.0 in 2022, but Intel has DDR5 first 05 | TweakTown.com

The upcoming Zen 4 micro architecture that AMD is aiming for a 2021 announcement and 2022 release, will pack support for both DDR5 and PCIe 5.0 support. AMD will be taking a big leap with Zen 4 as it will be using the 5nm node from TSMC, and then on top of that supporting both DDR5 and PCIe 5.0 stnadards.

PCIe 5.0 won't be so much for gamers as we're not really pushing the boundaries of things now with PCIe 4.0 (and most gamers are still on PCIe 3.0 -- it's only X570 chipsets from AMD and Radeon RX 5000 series cards that support PCIe 4.0). But servers, datacenters, and supercomputers will embrace PCIe 5.0 bandwidth with their arms wide, wide open.

Don't worry, DDR6 is already in development.

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Anthony Garreffa

Anthony Garreffa

Anthony joined the TweakTown team in 2010 and has since reviewed 100s of graphics cards. Anthony is a long time PC enthusiast with a passion of hate for games built around consoles. FPS gaming since the pre-Quake days, where you were insulted if you used a mouse to aim, he has been addicted to gaming and hardware ever since. Working in IT retail for 10 years gave him great experience with custom-built PCs. His addiction to GPU tech is unwavering.

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Alder Lake Chipsets Will Not Support PCIe Gen 5.0

It appears that Intel's 600 series chipset — built for Alder Lake — will not support the Gen 5.0 standard, per a report from HardwareTimes. According to a PCI-SIG certification, Intel's future Alder Lake-supported chipsets will max out at Gen 4.0 speeds running in an x4 configuration, meaning the only Gen 5.0 support Alder Lake will see is through the CPU lanes alone.

We don't know why Intel cut Gen 5.0 support from the 600 series chipsets, whether the it's cost issues or capability issues. Either way, this could be a positive strategy for Intel to keep Alder Lake motherboard prices at a minimum.

When Gen 4.0 first came out, we saw a large jump in motherboard prices due to the motherboards requiring much higher quality materials and far more PCB layers. These are both required to ensure Gen 4.0 speeds are stable. This is especially true of AMD's X570 platform which has full Gen 4.0 support on both the CPU lanes and chipset lanes. We can only imagine the same thing will happen with Gen 5.0, and probably be worse, since Gen 5.0 is significantly faster than Gen 4.0.

But with Intel supporting Gen 5.0 only on the CPU, motherboard prices may not be as expensive as they could be. It's much easier for motherboard manufacturers to build boards around one or two Gen 5.0 PCIe slots than to build the entire board to support Gen 5.0.

Plus, most consumers and prosumers are rarely saturating Gen 4.0 speeds right now, even on Gen 4.0 NVMe SSDs, and we don't expect this to change over the next few years. So this Gen 5.0 issue shouldn't be a problem for most buying into the Alder Lake platform next year.

Sours: https://www.tomshardware.com/news/intel-600-series-chipsets-no-pcie-gen-5
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PCIe 3.0 vs. PCIe 4.0 vs. PCIe 5.0: What's the Difference?

By Arol Wright

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The newest version of the PCI Express standard, PCIe 5.0, is coming. Why is it such a big deal, and what does it have in store?

Sometimes, it's hard to believe how quickly technology is advancing. It seems like yesterday AMD introduced us to their Ryzen 3000 series of CPUs, which came with PCI Express 4.0 as one of its headlining features. Intel only caught up with its Rocket Lake CPUs, launched in 2021. However, it seems like the industry is yet again ready to move forward. Alder Lake 12th gen Intel CPUs are rumored to come with PCI Express 5.0, the new version of the spec.

You may just have gotten a new flaming PC with support for PCIe 4.0. Thus, the question arises: what are the differences between PCIe 5.0 and the existing versions? And should I care?

PCIe 5.0 vs. PCIe 4.0: Double the Bandwidth

For the most part, the biggest improvement between different generations of PCI Express is always an increase in bandwidth of almost exactly double.

The transfer rate of the first version of the standard, PCIe 1.0, was around 250 MB/s over a single lane (x1) and was capable of 2.5 GT/s (gigatransfers). With the arrival of PCIe 2.0, it was doubled to 500 MB/s and 5 GT/s, respectively.

With PCIe 4.0, it increased to 1.97 GB/s and 16 GT/s, doubling from PCIe 3.0's 985 MB/s and 8 GT/s. I'm sure you get the drill by now—each new generation doubles the bandwidth of its predecessor or gets close to doubling it.

PCIe 5.0 isn't an exception.

PCIe 5.0 is the direct successor of the PCIe 4.0 standard. And yet again, the bandwidth and gigatransfer rate double over the previous generation, allowing data to be transferred at significantly faster speeds. 32 gigatransfers per second, or 32 GT/s, and a 3.94 GB/s transfer rate are all on the table. PCIe 4.0 was already crazy fast: you just need to look at a PCIe 4.0-capable NVMe SSD and the kinds of read/write speeds it can achieve. PCIe 5.0 will be twice as fast over the same number of lanes.

Related: The Best Budget PCIe 4.0 Motherboards

Of course, doubling speeds is easier said than done. While the physical connection remains the same, and PCIe 5.0 will remain fully backward compatible with previous PCI Express generations, its requirements will change to accommodate the higher speed. For example, motherboards supporting PCIe 5 will need to add greater capabilities under the hood for handling signal loss and noise. This is because going faster may encounter more signal integrity (SI) issues, and that needs to be accounted for to keep errors at bay as much as possible.

The following version of PCI Express, PCIe 6.0, which is already in development (as you probably guessed by now, the PCI-SIG consortium moves fast), will be helped out in terms of bandwidth increase and signal integrity by using PAM-4 signaling. PCIe 5.0, however, will need to use more conventional methods to make space for these higher speeds: better quality motherboard traces and thicker PCBs with more layers to minimize signal loss and impedance.

Why Should I Care About PCI Express 5.0?

Things like our graphics cards don't really need the obscene amounts of bandwidth PCIe 5.0 delivers, at least not right now. After all, not even the biggest and most powerful from NVIDIA's current lineup, the RTX 3090, manages to saturate a PCIe 4.0 x16 connection fully. However, there are many use cases where PCIe 5.0 might come in handy, both for consumer use cases and more professional ones. Devices that can benefit from having more bandwidth will be able to make use of it properly, while others that don't really need more speed can instead work more efficiently using fewer lanes.

On the consumer side, the main benefit of PCIe 5.0 is high-speed storage. On the storage side, NVMe drives with PCIe 5.0 speeds will be blazing fast. For example, Samsung's 980 Pro, often considered the gold tier of PCIe 4.0 drives, can reach sequential read speeds of up to 6,900 megabytes per second. A drive with PCIe 5.0 speeds could potentially reach twice that. High-speed storage is more important than ever, with things like Microsoft's DirectStorage promising to improve our gaming experience greatly. So, while PCIe 5.0 is not absolutely essential right now, it's likely that it'll come in handy in the future.

PCIe 5.0 will also become very important in data centers, as fast storage and high-speed networking are essential for communication. Some server network interfaces are looking into a transition from 100 GbE networking to 400 GbE in the not-so-distant future, and PCIe 5.0 will make it achievable. The full-duplex bandwidth of a PCIe 5.0 x16 link is 128 GB/s. A full-duplex 400 GbE link necessitates 800 Gbps of bandwidth. In bytes, this translates to 100 GB/s of aggregate bandwidth, which a PCIe 5.0 x16 connection can handle.

When Is PCIe 5.0 Coming?

The standard has already been released. The final PCI Express 5.0 specification was released on May 29, 2019, while Jiangsu Huacun showed the first PCIe 5.0 controller in November 2019. However, we're yet to see it in any finalized products so far. The latest CPUs from Intel and AMD, Rocket Lake and Zen 3 respectively, are currently only PCIe 4.0 compatible, as are most PCI Express peripherals currently on the market, whether graphics card or NVMe SSD.

Related: PCIe vs. SATA SSDs: Which Storage Drive Is Best?

However, they're coming soon. We expect Intel's 12th gen CPUs, codenamed Alder Lake, to bring PCIe 5.0 support to desktop computers, and those should be released to the market by the beginning of 2022. Alder Lake will also launch with a new socket, DDR5 RAM support, and new motherboard chipsets. As for AMD, while new CPUs are soon to launch with a new AM5 socket, those aren't expected to come with PCIe 5.0 support right out of the gate. Instead, it might be a couple of generations before AMD gets on the action.

Blazing Fast Storage, Networking, and Graphics

PCI Express 5.0 will be one of the hottest new things to arrive at the computer ecosystem. With double the transfer rate and bandwidth from PCIe 4.0 and four times the transfer rate of PCIe 3.0, it's a generational leap that will impact how we use our PCs and allow for mind-bending SSD and networking speeds and make things that weren't possible before a reality.

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What Is PCIe 4.0 and Should You Upgrade?

PCIe 4.0 will make your PC hardware faster, but it probably isn't supported yet. Should you upgrade your hardware to PCIe 4.0?

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About The Author
Arol Wright (15 Articles Published)

Arol is a tech journalist and Staff Writer at MakeUseOf. He has also worked as a news/feature writer at XDA-Developers and Pixel Spot. Currently a Pharmacy student at the Central University of Venezuela, Arol has had a soft spot for everything tech-related since he was a child. When not writing, you'll either find him nose-deep into his textbooks or playing video games.

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Sours: https://www.makeuseof.com/pcie-30-vs-pcie-40-vs-pcie-50-whats-the-difference/

Leak Indicates AMD’s Socket AM5 Won’t Support PCIe 5.0 at Launch

AMD-Zen-Feature

Back in 2019, AMD made PCI Express 4.0 the centerpiece of its Zen 2 launch. The X570 motherboard family paired well with the Zen 2 CPU family, and the increased I/O support gave AMD an additional argument for why some buyers might prefer its chips over Intel’s. Now, it looks as though Intel will leap ahead with Alder Lake, while AMD has no immediate plan to follow on desktop. AMD’s next Epyc refresh, Genoa, which will be built on Zen 4, is expected to offer PCIe 5.0, so AMD will apparently split its refresh plans between desktop and server next year.

This isn’t all that surprising, even if AMD has relied upon playing up its bandwidth advantages against Intel over the past few years. PCIe 4.0 drives are not as ubiquitous as PCIe 3.0 hardware was when AMD launched PCIe 4.0. We’re seeing such rapid advances in interconnect technology because the PCI-SIG ran into problems scaling bandwidth above PCIe 3.0. PCIe 2.0 arrived four years after PCIe 1.0 and PCIe 3.0 arrived four years after 2.0, but it took seven years for PCIe 4.0 to launch. Now, PCIe 5.0 will hit the market roughly two years after PCIe 4.0 did.

This information is part of the Gigabyte document trove that was hacked a few weeks ago. As such, it should be taken with a substantial grain of salt. According to this slide, AM5 supports USB4 in an external controller but the technology does not appear to be integrated in-chipset. USB 3.2 is supported natively at both its 10Gbps and 20Gbps transfer speeds.

One difference between the current X570 and the AM5 boards expected in 2022 is the addition of four more PCIe 4.0 lanes off the CPU. In the diagram above, four additional lanes of PCIe 4.0 have been dedicated to USB4 support. We suppose it’s possible that some vendors might ship without USB4 in order to offer a second PCIe x4 NVMe connection on the motherboard. There is no word on what DDR5 clock speeds AMD will support at launch. DDR5-4800 is the minimum spec, and it’s not impossible that we might see support for DDR5-5500 or even DDR5-6400 at launch.

As to how much this matters? That’s an interesting question. Intel may have some very early PCIe 5.0 drives for reviewers to test when Alder Lake drops, but manufacturers have reported that they plan to have PCIe 5.0 drive controllers in-market by early 2022 at the earliest. Apart from a major, Alder Lake-specific push, it’s likely that PCIe 5.0 drives will arrive sometime after platforms that can use them.

Latency is far more important than bandwidth when it comes to making consumer applications feel responsive, which is why an older SATA-based SSD drive still makes a system feel orders of magnitude faster than a hard drive, but doesn’t seem that much slower than an NVMe SSD in raw performance. It’s unlikely that anyone using an NVMe drive of any vintage would notice a huge improvement in day-to-day I/O tasks.

If you handle an enormous amount of file copying on a regular basis — if, for example, you do a lot of A/V editing — the calculus here may change somewhat. Keep in mind, however, that in many cases, a top-tier PCIe 3.0 drive might offer better performance than a midrange PCIe 4.0 drive. This also applies to PCIe 4.0 versus 5.0. In some cases, it might even apply to PCIe 3.0 versus 5.0.

Here’s why: Many SSDs these days are based on TLC or QLC NAND with an SLC cache. This is part of how manufacturers have kept increasing SSD space while simultaneously cutting prices, but the tradeoff here is performance consistency. A higher-end drive with either a larger SLC cache or a drive based on fast MLC or TLC combined with a high-end controller may not lose performance once it has written more than 75-150GB of data depending on the size of the SLC cache.

All of which is to say: The same buyers who might genuinely benefit from PCIe 5.0 in the near-term future are also the ones who move the most data on a regular basis. Because these customers are data-heavy to begin with, it’s important to consider the specifics of the SSD you want to buy. PCIe 5.0 drives, when they appear, should be high-performance products — but just because an SSD carries a faster number doesn’t automatically mean it’ll be better suited to every task.

Although the near-term benefits of adopting PCIe 5.0 over 4.0 are small, the limited group of buyers who can benefit from every I/O improvement it can find will have a new reason to choose Intel hardware over AMD, assuming Alder Lake delivers in other respects. Presumably, AMD will move to PCIe 5.0 with the second generation of AM5, provided this slide is accurate. As always, all leaks and rumors should be taken with an eye towards the fact that they are leaks and rumors, not official communication.

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Sours: https://www.extremetech.com/computing/326135-leak-indicates-amds-socket-am5-wont-support-pcie-5-0-at-launch

5 motherboard gen pcie

PCIe 5 vs. PCIe 4: Twice the bandwidth is coming

The PCI Express standard, or PCIe, has been a staple for connecting PC peripherals and components to a desktop. If you buy new PC parts in 2021, they’ll likely support the current fourth generation. But with Intel’s upcoming launch of its Alder Lake processors later this year, we’ll already be moving to the fifth generation of the PCI Express interface known as PCIe 5, which should offer significantly faster data transfers.

Originally introduced with preliminary specifications in 2017, the PCIe 5 standard was formally ratified by the PCI Special Interest Group in 2019. The standard isn’t expected to arrive in PCs until late 2021, when Intel builds in PCIe Gen 5 support on its upcoming line of processors and new motherboards. With that in mind, what exactly is PCIe 5 and will it be a substantial upgrade from PCIe 4?

PCIe Gen 4 vs. PCIe Gen 5

The main difference between each PCIe generation is speed. PCIe 1 had a bandwidth of 8 GB/s and a 2.5 GT/s (gigatransfer per second) clocked at a frequency of 2.5GHz. On the current PCIe Gen 4 standard that’s employed on many modern processors from AMD and Intel, bandwidth can go up to 64 GB/s and there is a gigatransfer maximum of 16 GT/s with a frequency of 16GHz.

PCIe 5.0 is viewed as an extension of the PCIe Gen 4 standard. With PCIe 5, the bandwidth, gigatransfer, and frequency are all doubled from the prior generation, which means that data can be transferred at substantially faster speeds. Here, you’re looking at 32 gigatransfers per second, or 32 GT/s, a 128 GB/s bandwidth in an x16 configuration, and a frequency of 32GHz.

The primary difference between the gigatransfer (GT/s) and bandwidth (GB/s) measurement is that the former is a measure of raw speed, while the latter is the data transfer rate. Raw speed measures how many bits can be transferred each second, while the data transfer rate must also take into account encoding overhead.

As an example, a PCIe 5 x8 link means that you’re getting 32 GT/s raw speed, but only 31.5 GB/s of bandwidth.

If you’re looking to be among the first to adopt PCIe 5 for your next desktop build, you’ll have to wait till the second half of 2021, when Intel releases its Alder Lake family of processors, which will be available for mobile and desktop. So far, Intel is the only company to announce support for the new standard.

Alder Lake, according to recent leaks, will require a new socket and motherboard, and upgrading to this latest silicon will require gamers to get a new board to benefit from all the latest changes, including PCIe 5 support. A combination of architectural changes, a switch to 10nm SuperFin manufacturing, and PCIe 5 support, along with faster DDR5 memory, will allow Alder Lake to get a 2x performance uplift in multithread applications, according to the latest leak.

Because of the faster speeds, there is a greater chance for signal loss, so the standard builds in capabilities to better handle noise and signal loss than PCIe Gen 4 to preserve data integrity.

Do you need to upgrade?

The faster transfer speeds will be important for applications that include machine learning and artificial intelligence, data center uses, and high-performance computing environments. This will help A.I. applications process more data at faster speeds. Given that PCIe is the highway that connects the processor, graphics card, storage, and FPGAs and ASIC accelerators, the move to faster PCIe Gen 5 could make cryptocurrency mining even more lucrative.

In general, most home PC users and gamers will find the speeds and capabilities of PCIe 4 — and even the preceding PCIe 3 — specifications to be more than sufficient.

In our comparison of PCIe 4 versus PCIe 3, we found that even capable graphics cards — like the Nvidia GeForce RTX 2080 Ti — don’t make full use of the bandwidth available in a PCIe Gen 3 x16 slot yet. So, PCIe 5 will be overkill for most gamers. Like the benefits of moving from Gen 3 to Gen 4, PCIe Gen 5’s speed boost will be most beneficial for those who need faster access to NVMe storage drives and RAID configurations.

Hopefully, in the future, with the faster speeds, peripherals, like GPUs, that connect to a PCIe slot will require fewer lanes. Rather than requiring the x16 lanes from today’s PCIe 4 standard, we can reduce that requirement to just x8 on PCIe 5. With smaller lane requirements to achieve similar speeds, gamers can potentially build systems that are equally as powerful in a smaller, more compact tower.

What is PCIe?

Computer motherboard stock photo

PCIe is known as the peripheral component interconnect express that’s used to connect various components in your desktop PC. It’s one of the most important connectivity standard on a modern PC, as it allows various components to communicate with each other.

As an interface standard, PCIe helps you connect high-speed solid-state drives (SSDs), graphics cards, and wireless networking cards to your processor. On a desktop, you’ll connect various cards to the PCIe slot on your motherboard, and the number of PCIe slots available and type of slots will vary depending on the board you select.

You’ll often notice that PCIe slots and cards are designated with a numeric value that’s preceded by an x. The configurations include PCIe x1, x2, x4, x8, x16, and x32. These numbers indicate how many lanes are available — the higher the number, the faster data can travel. PCIe x1 means that there is only one lane, while PCIe x16 indicates that there are 16 available lanes.

Cards and slots can be mixed and matched despite the number of lanes indicated by each component, with data bandwidth determined by the slower part. For example, if you have a PCIe x4 slot on your motherboard, you can connect a PCIe x1 card. Here, your bandwidth is capped by the card’s single available lane, which is one bit per cycle. Conversely, if you insert a PCIe x8 card into the PCIe x4 slot, data will only travel at half the bandwidth compared to a card that was inserted into a PCIe x8 slot.

For gamers, the magical number is the PCIe x16, and most GPUs will require a PCIe x16 slot to fully take advantage of the card’s capabilities. In general, even though PCIe x32 exists, it is expensive and rare, and most PC components top out at x16.

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Sours: https://www.digitaltrends.com/computing/pcie-gen-5-vs-pcie-gen-4/
Maybe upgrading is pointless….. - PCI-E Gen 4 vs Gen 3

Next-gen PCIe 5.0 motherboards inch closer with Phison's new chip

Phison, purveyors of speedy SSD controllers for the likes of Sabrent and Corsair, has announced that it is releasing a new PCIe 5.0 Redriver IC to solve signal attenuation problems on motherboards. The PS7101 should boost motherboard compatibility as we transition from existing PCIe 3.0 and PCIe 4.0 support to the newer, faster standard.

You may be wondering what the fuss is about, as not only are there no PCIe 5.0 SSDs or graphics cards out there yet but there are no supporting CPUs or motherboards around either. And in the very short term, you have a point, but the standard is definitely on the way and motherboard manufacturers are going to want to futureproof their offerings as much as possible. 

PCIe 5.0 is rumoured to be coming to Intel's next-gen Alder Lake CPUs before the end of the year and to AMD's Zen 4 next year, although when we'll have motherboard chipsets that support the standard is another question. 

This announcement from Phison potentially gives motherboard manufacturers the option of adding the standard a bit sooner than they could offer independently. 

Something broadly similar to this happened with the release of the Z490 chipset. These motherboards were designed to support PCIe 4.0, even though the CPUs they were launched with, Intel's Comet Lake-S, didn't natively support PCIe 4.0. The idea was that by supporting PCIe 4.0 on the motherboard, it would make upgrading easier later down the line. It did make for a confusing sell at the time though.

The final question is whether there is a need for PCIe 5.0, as PCIe 4.0 hasn't been around that long, with Intel only recently supporting it with its Rocket Lake chips. The problem is the faster second-generation PCIe 4.0 SSDs are already bumping up against the bandwidth limits of the interface for sequential reads and writes. Phison's own E18 controller, which can be found in the likes of the Sabrent Rocket 4 Plus, is capable of hitting up to 7,100MB/s. Other drives, likes the Adata XPG Gammix S70, can hit 7,400MB/s. 

PCIe 5.0 will be a welcome addition to our PCs, though, as it doubles this theoretical bandwidth up to a whopping 16GB/s. That should give future games plenty of bandwidth for seriously detailed game assets—we should have Microsoft's DirectStorage landing before the end of the year as well, to help make the most of this storage too.

Alan has been writing about PC tech since before 3D graphics cards existed, and still vividly recalls having to fight with MS-DOS just to get games to load. He fondly remembers the killer combo of a Matrox Millenium and 3dfx Voodoo, and seeing Lara Croft in 3D for the first time. He's very glad hardware has advanced as much as it has though, and is particularly happy when putting the latest M.2 NVMe SSDs, AMD processors, and laptops through their paces. He has a long-lasting Magic: The Gathering obsession but limits this to MTG Arena these days.

Sours: https://www.pcgamer.com/phison-pcie-5-redriver/

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Intel Demos PCIe 5.0 on Upcoming Sapphire Rapids CPUs

Intel and Synopsys have jointly announced the first PCIe 5.0 IP interoperability test. The goal of this type of testing is to demonstrate Intel’s commitment to future high-speed interfaces, as well as to create reference platforms for early PCIe 5.0 certification.

It’s also a sign that PCIe 5.0 could show up on motherboards in as little as 12 months, though I think 2022 is a bit more likely than late 2021. If Intel launches Rocket Lake at the end of Q1 2021, as is expected, it’s not clear the company would then refresh Alder Lake in the October / November time frame. Typically Intel likes to wait a bit longer than that between product cycles. This, in turn, means that the Sapphire Rapids platform — which is where Intel is expected to debut both PCIe 5.0 and technologies like DDR5 — would debut some time in 2022. There are also rumors that AMD might not move to DDR5 until around this time, so the timeframe is consistent (even if we don’t know if the rumor itself is accurate).

PCIe-bandwidth

Just as PCIe 4.0 doubled PCIe 3.0 bandwidth, PCIe 5.0 is expected to double PCIe 4.0. That works out to 4GB/s in each direction for an x1 link, 15.754GB/s for an x4 link, and 63GB/s in each direction for an x16 link. This is an interesting set of developments with potentially long-term ramifications.

Microsoft and Sony have both demonstrated that an SSD with comparatively low performance (compared with DRAM) can dramatically accelerate game performance and loading times. If effective PCIe performance continues to scale, it implies this trend of using fast SSD storage in lieu of RAM could have legs beyond a single console generation. PCIe 6.0 is supposedly targeting a 2021 release date, which means we could see interfaces with support for up to 8GB/s per link by 2024 – 2025. A 4x PCIe 6.0 link would offer 4x the bandwidth of a PCIe 4.0 x4 connection, allowing for even faster storage configurations and a potential extension of the benefits we’re already seeing today.

Two things to keep in mind, as far as the potential impact future PCIe standards could have on computing. PCIe 5.0 and PCIe 6.0 hit bandwidth levels equivalent to what we expect from modern DRAM, but even if they can sustain equivalent bandwidth, PCI Express’ latencies are much, much higher than RAM. That’s not a problem for NAND flash, which also has much higher latency than DRAM, but it’s part of why NAND connected via PCIe can’t completely replace DRAM, no matter how much bandwidth can be provided.

Second, the power consumption from these standards could be formidable. AMD’s PCIe 4.0 motherboards draw more power than previous platforms, and while we don’t know how Intel will compare, it stands to reason that PCIe 5.0 and PCIe 6.0 will increase power consumption to some degree.

It’s also interesting to consider what this massive bandwidth boost could mean for AI. Generally speaking, the goal with AI is to keep workloads as close to the chip as possible — moving data across PCIe is a great way to waste tremendous amounts of power. Still, there are likely to be at least some workloads where the ability to leverage this kind of bandwidth would be useful. It will be interesting to see how Nvidia evolves technologies like NVLink if PCIe starts jumping by leaps and bounds.

One thing these improvements are unlikely to change is overall GPU performance. Tests repeatedly show that PCIe improvements have only a small impact on graphics cards, and if we truly quadruple available bandwidth in the next 4-5 years, we’ll be moving much faster than any GPU can match. Expect the biggest impacts in markets like storage and AI.

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Sours: https://www.extremetech.com/computing/316257-intel-demos-pcie-5-0-on-upcoming-sapphire-rapids-cpus


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