chip-design

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2026-03-11 · docs.google.com

Designing AI Chip Software and Hardware

Designing AI Chip Hardware and Software Bjarke Hammersholt Roune 2026 This document is, for now, open for comments. You can use the Google Docs comment feature to add comments anywhere. Thanks! What is this document? I was going to start an AI chip company and this document…

2026-01-04 · semiengineering.com

Impact Of On-Chip SRAM Size And Frequency On Energy Efficiency And Performance of LLM Inference (Uppsala Univ.)

A new technical paper titled “Prefill vs. Decode Bottlenecks: SRAM-Frequency Tradeoffs and the Memory-Bandwidth Ceiling” was published by researchers at Uppsala University. Abstract “Energy consumption dictates the cost and environmental impact of deploying Large Language…

Our simulation methodology combines OpenRAM for energy modeling, LLMCompass for latency simulation, and ScaleSIM for systolic array operational intensity.
Counter-intuitively, high compute frequency can reduce total energy by reducing execution time and consequently decreasing static energy consumption more than the resulting dynamic power increase
2025-12-18 · morethanmoore.substack.com

Solving The Problems of HBM-on-Logic

Future AI Accelerators Might Need To Be Slower To Be Faster

This means a singular high-powered compute die consuming ~400W, with multiple 12-Hi HBM stacks.
peak GPU temperature of 69.1ºC, with the HBM silicon reaching around 60ºC in its worst case.
2025-10-06 · venturebeat.com

Beyond Von Neumann: Toward a unified deterministic architecture

The mechanism behind this is a time-resource matrix: A scheduling framework that orchestrates compute, memory and control resources across time. Much like a train timetable, scalar, vector and matrix operations move across a synchronized compute fabric without pipeline stalls or contention.
By predicting exactly when data will arrive — whether in 10 cycles or 200 — Deterministic Execution can slot dependent instructions into the right future cycle. This turns latency from a hazard into a schedulable event, keeping the execution units fully utilized and avoiding the massive thread and…
2025-08-31 · semiwiki.com

Backside Power Delivery (BSPD) Wiki

Backside Power Delivery (BSPD), also called Backside Power Delivery Network (BSPDN) or backside power via (BPV) technology, is a semiconductor manufacturing innovation in which the chip’s primary power distribution network … Continue reading "Backside Power Delivery (BSPD) Wiki"

2025-05-19 · spectrum.ieee.org

Prototype Computer Uses Noise to Its Advantage

Thermodynamic computing isn't just a rebrand of probabilistic computing

Normal Computing’s prototype chip, which they termed the stochastic processing unit (SPU), consists of eight capacitor-inductor resonators and random noise generators. Each resonator is connected to each other resonator via a tunable coupler. The resonators are initialized with randomly generated…
2025-05-15 · semiengineering.com

Die-to-die Interconnect Standards In Flux

Many features of UCIe 2.0 seen as “heavy” are optional, causing confusion.

The spec is defined with so many variants that you can tailor it to your exact needs. It’s applicable for everything from automotive to high-performance compute to AI to mil/aero because it has so many flavors. That’s also a curse to an IP provider. How do you support all those flavors?”
the latter predominates, since virtually all projects underway are internal projects, with all chiplets being internally created and applied. Interoperability with externally sourced chiplets is therefore not a concern
2025-03-27 · semiengineering.com

First-Time Silicon Success Plummets

Number of designs that are late increases. Rapidly rising complexity is the leading cause, but tools, training, and workflows need to improve.

“Historically, it’s been around 30%. Two years ago it dropped to 24% from 2023 to 2024. It dropped to 14% this time around. That’s one data point. Another is that historically we’ve seen about two-thirds of projects were behind schedule. That increased to 75% behind schedule.”
2025-01-05 · righto.com

Pi in the Pentium: reverse-engineering the constants in its floating-point unit

Intel released the powerful Pentium processor in 1993, establishing a long-running brand of high-performance processors. 1 The Pentium incl...

Note: Based on Ken Shirriff's article "[Pi in the Pentium: reverse-engineering the constants in its floating-point unit](https://www.righto.com/2025/01/pentium-floating-point-ROM.html)", here is an outline of each section with explanations of the findings: | Section | Findings | |---|---| | **Introduction** | The Pentium processor's floating-point unit (FPU) computes transcendental functions like sine…