PCI-SIG 已經發布了 PCIe 7.0 接口的最終規格。它們與 3 月份發布的 PCIe 7.0 版本 0.9 規范沒有變化()。PCIe 7.0 將提供現代 PC 中使用的 PCIe 5.0 的四倍帶寬。這意味著更快的驅動器、顯卡和 AI 加速器。
圖片來源:Wccftech
PCIe 7.0 標準的主要特點是:
- 在 x16 配置中,數據速率為 128 GT/s,雙向高達 512 GB/s;
- 使用四電平脈沖調制 (PAM4) 電路
- 關注信道參數和覆蓋區域;
- 低延遲和高可靠性
- 提高能源效率
- 保持與所有以前版本的 PCIe 的向后兼容性。
PCIe 7.0 規范解決了處理大量數據的挑戰,包括 AI/ML、800G 以太網、云和量子計算。在其最新的新聞稿中,PCI-SIG 指出,它已經在為開始開發 PCIe 8.0 接口規范做初步準備。
除了宣布最終的 PCIe 7.0 規范外,PCI-SIG 還宣布了光感知重定時器規范的新修訂版,以便為 PCI Express (PCIe) 技術提供更高的性能。
Optical Aware Retimer 設計變更通知修改了基于 PCIe 重定時器的解決方案,以反映 PCIe 6.4 和 PCIe 7.0 規范,提供了業界首個通過光纖實現 PCIe 的標準化方法。
Optical Aware Retimer 的主要功能:
- 實現各種光學技術的無縫集成,以實現現有 PCIe 6.4 和 7.0 兼容交換機、根復合體和端點芯片設計之間的光學互連。
- 為機架和模塊提供擴展覆蓋范圍(支持);
- 能夠跨電氣和光域多路復用和顯示數據
- 使用比 Electric Copper 解決方案更緊湊的實施方案的可能性。
考慮到 PCIe 6.4 和 7.0 規范的 Optical Retimer ECN 修正案現在可供 PCI-SIG 成員在該組織的官方網站上查看。PCI-SIG 還邀請感興趣的各方參與新技術的測試。
PCIe 7.0 標準的初步測試計劃于 2027 年完成。新接口的集成商名單,計劃于 2028 年推出。
PCI-SIG today announced the official release of the PCI Express (PCIe) 7.0 specification, reaching 128.0 GT/s, to members. PCIe 7.0 specification targets data-driven applications like AI/ML, 800G Ethernet, cloud, and Quantum computing. Pathfinding for the PCIe 8.0 specification is already in progress to continue supporting the industry's investments and product roadmaps in the PCIe technology ecosystem.
PCIe 7.0 Specification Features
Delivers 128.0 GT/s raw bit rate and up to 512 GB/s bi-directionally via x16 configuration
Utilizes PAM4 (Pulse Amplitude Modulation with 4 levels) signaling and Flit-based encoding
Provides improved power efficiency
Maintains backwards compatibility with previous generations of PCIe technology
"PCIe technology has served as the high-bandwidth, low-latency IO interconnect of choice for over two decades and we are pleased to announce the release of the PCIe 7.0 specification, which continues our long-standing tradition of doubling the IO bandwidth every three years," said Al Yanes, PCI-SIG President and Chairperson. "As artificial intelligence applications continue to scale rapidly, the next generation of PCIe technology meets the bandwidth demands of data-intensive markets deploying AI, including hyperscale data centers, high performance computing (HPC), automotive and military/aerospace."
"It's a special occasion when a PCIe specification hits the final version," observed Ian Cutress, Chief Analyst and CEO, More Than Moore. "The rise in the demand for both compute and networking, enabled through PCIe technology, is at an all-time high, despite the complexities of creating standards in the industry around high-speed signaling. Datacenters are ready to start deploying networks built on PCIe 7.0 technology, and almost every ASIC company I talk to is already engaged with the IP providers and are set to take advantage. Even with the popularity and focus that went into PCIe 6.0 deployment, the PCIe 7.0 specification has more enthusiasm than any previous version."
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