PCI Express 4.0 as Fast As Possible
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Promos
The newest version of PCI Express will start appearing on motherboards soon - but is there anything compelling about it? Freshbooks message: Head over to freshbooks.com and don’t forget to enter Tech Quickie in the “How Did You Hear About Us” section when signing up for your free trial. PlayOnLinux: playonlinux.com Techquickie Merch Store: designbyhumans.com Techquickie Movie Poster: shop.crowdmade.com Follow: twitter.com Leave a reply with your requests for future episodes, or tweet them here: twitter.com Join the community: linustechtips.com Intro Theme: Showdown by F.O.O.L from Monstercat - Best of 2016 Video Link: youtube.com iTunes Download Link: itunes.apple.com Listen on Spotify: open.spotify.com
PCI Express 4.0 is examined as the successor to PCIe 3.0, focusing on whether the higher bandwidth translates into practical benefits. The video explains that PCIe 3.0 already offers a very high default bandwidth for a full x16 link, which made the push for 4.0 slower because the gains needed to justify new hardware must unlock real-world improvements rather than just raw speed. It highlights the core motivation behind 4.0: freeing up PCIe lanes so multiple devices can coexist without bottlenecking a single high‑end GPU, NVMe SSDs, or external interfaces. The host technology discussion explores how the lane capacity could support external GPUs, faster storage, and higher‑throughput networks, with example scenarios like NVMe SSDs and 10 Gbps Ethernet drawing on substantial portions of lane budgets while leaving room for additional devices. The presenter also touches on potential future directions such as external GPU enclosures and data center scale, where the new standard could enable more aggressive configurations for AI, climate research, and large‑scale cloud applications. The segment closes by contemplating motherboard adoption timing, market reaction, and whether even faster PCIe will spur new form factors or features beyond faster data transfer, including playful speculation about RGB expansion cards and on‑board AI enhancements. Overall, the video frames PCIe 4.0 as a meaningful evolution primarily for systems needing multiple fast devices rather than as a simple speed race, with implications for consumer desktops, laptops via Thunderbolt, and enterprise deployments.
Topics · technology · hardware · computing · data_center
Questions answered
- What is the primary practical benefit of PCIe 4.0 over PCIe 3.0 according to the video?
- PCIe 4.0 mainly frees up PCIe lanes by increasing per-lane bandwidth, allowing more devices to connect without bottlenecking a single high‑end component, such as a GPU, while maintaining high performance for NVMe SSDs and external interfaces.
- How might PCIe 4.0 affect data center and AI workloads?
- In data centers and AI workloads, PCIe 4.0 can provide higher aggregate bandwidth and lower latency across many devices, enabling faster GPUs, caches, and accelerators, which could accelerate cloud applications and climate research workloads that rely on numerous high‑speed interconnects.