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ServeTheHome Logo ServeTheHome Advertisement [INS::INS] ServeTheHome Logo ServeTheHome Logo * Forums * AI * Server + Server Systems + Server CPUs + Accelerators + Server Motherboards + Server Chassis + Other Components * 5G Edge * Storage * Networking * Workstation + Workstation Processors + Workstation Motherboards * Software + Operating Systems + Server Applications + Virtualization * Guides + Buyer's Guides + Tips + Top Hardware Components for TrueNAS / FreeNAS NAS Servers + Top Hardware Components for pfSense Appliances + Top Hardware Components for napp-it and Solarish NAS Servers + Top Picks for Windows Server 2016 Essentials Hardware + The DIY WordPress Hosting Server Hardware Guide [ ][Search] Home News PCIe 8.0 Announced by the PCI-SIG Will Double Throughput Again * News PCIe 8.0 Announced by the PCI-SIG Will Double Throughput Again By Cliff Robinson - August 9, 2025 7 Facebook Twitter Pinterest Linkedin Email Print Copy URL PCIe Bandwidth By Generation And Link WidthPCIe Bandwidth By Generation And Link Width The PCI-SIG announced this week that it is not going to stop. Targeting a 2028 release, the PCIe 8.0 specification will double the throughput over PCIe 7.0. With the release, the PCI-SIG also shared two neat charts. PCIe Gen8 Announced by the PCI-SIG Will Double Throughput Again The PCI-SIG has this graphic to show what is happening to I/O bandwidth. It says that the I/O bandwidth is doubling every three years. PCIe Gen8 IO Bandwidth DoublingPCIe Gen8 IO Bandwidth Doubling Something to also keep in mind is that this is very device and interface centric. From a processor and system point of view, the number of controllers and lanes is also increasing at the same time the link speeds increase. So from a system standpoint, the cumulative I/O bandwidth is increasing at an even faster rate. Now for the chart that many of our readers will want to have handy. This shows the PCIe bandwidth by generation and link width. The headline feature is that the PCIe Gen8 x16 link will have 1TB/s of bandwidth available, up from 128GB/s in today's PCIe Gen5. PCIe Bandwidth By Generation And Link WidthPCIe Bandwidth By Generation And Link Width Of course, this is the kind of table that is a good reference for folks who want to compare bandwidth across generations and lane configurations. The best part is that it not only looks back to the original PCIe implementation, but it also goes to the PCIe generation that we will be using at the end of the decade. Final Words This is certainly forward-looking. We are on PCIe Gen5 today. PCIe Gen6 is the generation that we are starting to see more often, with some solutions already hitting the market, like the NVIDIA ConnectX-8 NIC and NVIDIA B300 generation. PCIe Gen7 is still a few years off. Still, with so much investment in the AI build-out, there is a major push in the industry to continue to increase the speed of interconnects. [INS::INS] * TAGS * PCIe Gen8 Facebook Twitter Pinterest Linkedin Email Print Copy URL Previous articleMicrochip Adaptec SmartRAID 4300 A New Era of NVMe RAID Controller Without Drive Connectivity Next articleKioxia Shows LC9 for 8PB or More in 2U and 32-Layer Die Stacked NAND at FMS 2025 Cliff Robinson They call me "the STH news guy" for a reason. RELATED ARTICLESMORE FROM AUTHOR Universal Chiplet Interconnect Express UCIe 1.0 Cover UCIe 3.0 Spec Released with Big Speed Up for Chiplets NVIDIA CUDA Toolkit 13.0 NVIDIA CUDA Toolkit 13.0 Is Out Intel E810 CQDA2 Front Intel Looking to Spin and Sell its Networking and Edge Business 7 COMMENTS 1. yamamoto August 9, 2025 At 9:26 pm IMO the PCIe bandwidth chart is a bit misleading and confusing, it adds-up Xmit and Recv bandwidth and the resulted number is meaningless. PCIe Gen3 x16 link is usually considered as 16GB/s because it can send 16GB (minus protocol overhead) per second. 2. Easy Rhino August 9, 2025 At 10:19 pm The six or seven year reign of pcie 3.0 still cracks me up. 3. Dustin August 10, 2025 At 8:31 am I don't know what to make of the PCI-SIG, they can't even update their slide captions for this new generation: > 35 Permutations yielding 11 unique bandwidth profiles There are 40 boxes in their chart, and 12 bandwidth options. 4. Carl August 10, 2025 At 9:08 am @Easy Rhino pcie 3.0: Was definitely Ground Hog Day for me (working within a modest (by today's standards) lake of 5K Xeon/Epyc based servers for a financial firm from 2012 - 2021.) 5. James August 11, 2025 At 5:57 am With the newer PCIe generations eventually trickling down to consumer grade solutions, it might be time for a resurgence of the "south bridge" concept. Take 1-4 of those hyper fast lanes, and downgrade it to a previous generation for things like networking, sound, etc. 6. Stefan August 11, 2025 At 6:26 pm It almost sounds like we could ended up with a graphics card that is on PCIe 8.0 x1...except the goldfingers also provide as a reinforcement to hold up the nifty heavy clunk of metal that is a graphics card... 7. qrusher August 13, 2025 At 11:26 am >gen3 =gt/s LEAVE A REPLY [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] Please enter your comment! [ ] Please enter your name here [ ] You have entered an incorrect email address! Please enter your email address here [ ] [ ]Save my name, email, and website in this browser for the next time I comment. [ ]Sign me up for the STH newsletter! [Post Comment] [ ] [ ] [ ] [ ] [ ] [ ] [ ] D[ ] This site uses Akismet to reduce spam. Learn how your comment data is processed. Newsletter Get the best of STH delivered weekly to your inbox. We are going to curate a selection of the best posts from STH each week and deliver them directly to you. Your email address: [ ] [Sign up] By opting-in you agree to have us send you our newsletter. 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