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星期四

  1. SemiAnalysis精选

    又一次巨大飞跃:NVIDIA Rubin CPX 专用加速器与机架

    NVIDIA 推出面向推理 prefill 阶段的 Rubin CPX,以更高算力占比和低成本内存减少 HBM 与 NVLink 资源浪费。单芯片提供 20 PFLOPS 稠密 FP4 算力、128GB GDDR7 和 2TB/s 带宽,并通过 PCIe Gen 6 联网。该产品将用于固定配置的 VR200 NVL144 CPX 或更灵活的 Vera Rubin CPX 双机架方案。

    able to the EFA NIC in the sidecar rack. MTIAv4’s SUE72 (featuring a 72-logical GPU with all to all switched scale-up size just like the VR200 NVL144) design similarly can lean on Meta internal inference workloads. Even emerging designs such as OpenAI’s chip with Broadcom stand to compete given they will be codesigned with Frontier Models in mind and with an internal workload as a backstop. Despite enjoying the benefit of internal demand, the MTIAv3 is excluded from this category due to its smal

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星期四

  1. SemiAnalysis精选

    Amazon AI 复苏:AWS 与 Anthropic 扩建多吉瓦级 Trainium 基础设施

    AWS 正为 Anthropic 扩建多吉瓦级 AI 训练基础设施,三个接近完工的园区合计拥有逾 1.3GW IT 容量,最大园区将部署近百万颗 Trainium2。Trainium2 的多项性能落后于 NVIDIA 系统,但在单位内存带宽总拥有成本上具有优势,契合 Anthropic 侧重强化学习和训练后扩展的路线。Anthropic 还深度参与 Trainium 的系统设计,同时继续使用 Google TPU 和 NVIDIA GPU。

    fivefold year-to-date to reach $5B annualized. To keep that trajectory, Anthropic is betting hard on Scaling Laws. While Dario’s startup draws fewer headlines than OpenAI, xAI and Meta Superintelligence, it isn’t shy about investment. AWS has well over a gigawatt of datacenter capacity in final stages of construction for its anchor customer. AWS is building datacenters faster than it ever has in its entire history. And there’s much more on the horizon. Trainium vs GPUs While Amazon’s AI Datacent

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星期三

  1. SemiAnalysis精选

    H100 与 GB200 NVL72 训练基准:功耗、TCO、可靠性及软件改进分析

    SemiAnalysis 对 H100 与 GB200 NVL72 的训练性能、功耗、TCO 和可靠性进行了基准分析,发现 GB200 NVL72 的每 GPU 总成本及 TCO 约为 H100 的 1.6 倍。H100 软件优化使 GPT-3 175B 的 BF16 MFU 在一年内从 34% 升至 54%。GB200 NVL72 尚受可靠性和诊断工具限制,当前仍无法完成超大规模训练。

    ter for Llama 3 405B vs GPT3 175B at 8.8 Joules per token vs 3.6 Joules per token respectively. This means that for the same energy as the average US household consumes in a year, Meta can train 4.4B tokens on Llama3 405B on BF16. To train to convergence using 15T tokens, Meta would require an amount of energy equal to the annual consumption of an entire neighborhood of 3,400 US households. Next, we look at Llama3 70B training performance for different cluster sizes. As we increase the cluster s

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星期三

  1. SemiAnalysis

    分析:GPT-5 为广告变现与消费级 SuperApp 铺路

    SemiAnalysis 认为,GPT-5 的实时 Router 可按查询复杂度分配模型与算力,为 OpenAI 变现 700m+ 免费用户奠定基础。免费用户接触推理模型的数量首日增长 7 倍,付费用户增长近 3.5 倍;文章推测 OpenAI 或通过商业意图识别、智能体购物和交易抽成打造消费级 SuperApp,而非采用展示广告。

    which smaller companies are already benefiting from the shift of monetizable queries away from search to AI. OpenAI is firmly knocking on the door of technology giants Google and Meta and even Amazon. Previous scares about AI have been focused on search query volume, not being replaced in the ad tech stack. ChatGPT can compete with dominant platforms for its place in the ecosystem, and to date this is push into purchasing is the most concrete example of OpenAI coming for advertising at large. I

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星期一

  1. SemiAnalysis

    VLSI 2025 分析:Intel 18A、DRAM 演进、背面供电与中国 FlipFET

    SemiAnalysis 梳理 VLSI 2025 的半导体进展,涵盖 Intel 18A、数字孪生、4F2 与 3D DRAM、背面供电及中国 FlipFET。Intel 称 18A 的 SRAM 相比 Intel 3 缩小 30%,但其整体密度预计略低于 TSMC N3P、比 N2 低近 30%。4F2 DRAM 可能先延续数代再转向 3D,而数字孪生正从原子级模拟扩展至晶圆工艺与全自动晶圆厂。

    s silicidation. DFT-NEGF is then used to calculate contact resistance and current-voltage curves across the interface. For gate oxide design, the complex multi-layer work function metal stack is built using MLFF and simulated to check its structure and chemical composition. Dipole dopants can then be introduced and optimized with DFT, which also does electrostatic analysis to calculate key parameters such as effective work function, Schottky barrier height and equivalent oxide thickness. As we m

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星期二

  1. Linear:Now

    Linear 探讨 AI 时代的产品设计:从通用聊天转向工作台

    Linear 团队提出,AI 产品设计应超越通用聊天界面,以面向具体工作流的“工作台”组织 AI 能力。结构化界面可以降低用户认知负担和输出差异,并为 AI 智能体的部署、管理、审核及人工参与提供明确环境。

    An abstract hero asset showing windows on a screen

    and then complement it with AI functions. Bringing function to form⁠ One way I visualize this relationship between the form of traditional UI and the function of AI is through the metaphor of a ‘workbench’. Just as a carpenter’s workbench is familiar and purpose-built, providing an organized environment for tools and materials, a well-designed interface can create productive context for AI interactions. Rather than being a singular tool, the workbench serves as an environment that enhances the u

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星期三

  1. antirez 原创博客

    Redis 作者 antirez 宣布回归并谈许可证与向量数据结构

    Redis 作者 antirez 在离开约 4.44 年后宣布回归 Redis 生态,以某种类似布道者的角色重新参与社区与核心开发。他说明是自己主动联系公司,薪酬为正常工资并持有与之前相同的股票期权,并称与社区的裂痕并非主要源于许可证切换。他还透露正在实现一个把分数换成向量的新数据结构原型,包含 VSIM、VADD、VCARD 等命令,从零重写 HNSW,目前仍处于早期阶段。

    der to model their use cases. Still, while normally the associated item will likely be a small string or a document ID, nothing prevents it from being something more complex, with metadata that can be filtered later (but I’ll resist). I just have the feeling that many use cases don’t really need complex server-side filtering, and can be modeled by pre-partitioning data. What I see with great interest is the addition of a potential STORE option, to store the result into a sorted set instead of re

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星期一

  1. Benedict Evans:Blog

    搜索竞争:Google 默认协议被判违法之后

    Benedict Evans 分析美国法院本周裁定 Google 的默认搜索协议违法一事,指出搜索是依靠用户行为强化的飞轮,Google 2022 年向苹果支付约 200 亿美元、向其他公司支付 100 亿美元换取默认地位,美国 50% 的搜索发生在有默认合同的渠道上。他认为法院大概率会叫停 TAC 支付,但后续补救措施效果不明,苹果、三星、微软与 Google 之间的博弈结果难以预判。他还提到 LLM 的出现改变了人们对搜索本身的想象,可能成为绕开 Google 强化学习引擎的入口,但对幻觉问题能否被现有厂商更好处理持怀疑态度。

    Lenovo) they’re too far out of scope: perhaps more importantly, as above, if a large sample of search queries is needed, neither of them have enough. One could consider Amazon and Meta here, but only Apple has both the money and the distribution: it can launch as the default on devices driving 30% of US search, giving it several times more query volume than Bing has ever seen. (Note that Apple has some search activity data already: as per the screenshots above, it sees the queries, and knows whi

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