Home Technology peripherals AI IBM cooperates with Macronix to launch a new AI simulation chip, which is 14 times more energy efficient and equipped with phase change memory technology

IBM cooperates with Macronix to launch a new AI simulation chip, which is 14 times more energy efficient and equipped with phase change memory technology

Sep 05, 2023 am 10:45 AM
ai analog chip Energy efficiency improvement phase change memory

IBM Research Laboratory released its latest research results in the journal Nature on August 23, successfully developing a new artificial intelligence (AI) simulation chip. The energy efficiency of this chip is 14 times that of traditional digital computer chips, which can significantly reduce the power consumption of AI computing

IBM cooperates with Macronix to launch a new AI simulation chip, which is 14 times more energy efficient and equipped with phase change memory technology

This content is rewritten as follows: According to the abstract, current artificial intelligence models with billions of parameters can achieve high accuracy in a variety of tasks, but also highlight the limitations of traditional general-purpose processors (including graphics processors and central processing units). Processor, etc.) low performance problem. In order to solve this problem, the IBM research team proposed a "simulated memory computing" solution to provide higher energy efficiency by performing matrix-vector multiplication in parallel on its own memory

IBM's research team developed a 14-nanometer analog chip based on this solution, using 34 large phase change memory (PCM) arrays, combining digital-to-analog conversion input, analog peripheral circuits, analog-to-digital conversion output and large-scale Parallel 2D mesh routing. Each 14-nanometer chip can encode 35 million PCMs, and in a scheme where each weight corresponds to 2 PCMs, 17 million parameters can be accommodated. Combined, these chips can handle real-world AI application experiments as effectively as digital chips

IBM cooperates with Macronix to launch a new AI simulation chip, which is 14 times more energy efficient and equipped with phase change memory technology

During the test process, IBM's research team used Google speech detection and Librispeech speech recognition data sets to respectively test the efficiency of the chip's language processing capabilities

The IBM team proposed a convolutional neural network architecture for keyword speech detection and trained it using a Google voice command data set containing 12 keywords. The team adopted a simpler FC (fully connected) network structure, ultimately achieving a recognition accuracy of 86.14%, and the submission speed was 7 times faster than the current best case of MLPerf. The model is hardware-aware trained on the GPU and then deployed on the team’s simulated AI chip

On the larger Librispeech speech recognition dataset, we used a combination of 5 simulated AI chips to run an RNN-T (Recurrent Neural Network Transformer) model to transcribe speech content letter by letter. The system, which contains 45 million weights from 140 million PCM devices on five chips, is able to capture and transcribe the audio of people speaking with an accuracy very close to that of a digital hardware setup. After experiments, we finally achieved a word error rate of 9.258%, and the energy efficiency reached 6.704TOPS/W (one trillion operations per second/watt), which is 14 times higher than the current best energy efficiency of MLPerf

The phase change memory equipped on this AI chip was jointly developed by IBM and Macronix, which requires attention

According to our understanding, the cooperation between Macronix and IBM has a long history. As early as 2004, the two parties established a strategic cooperation alliance and jointly invested in the development of phase change memory for more than ten years. Although other competitors initially joined, over time many manufacturers have withdrawn from joint R&D cooperation. Currently, Macronix is ​​the only partner of IBM phase change memory and has obtained specific artificial intelligence-related authorization

Currently, Macronix and IBM are jointly developing plans for phase change memory. This plan will be carried out in one phase of three years. After the expiration, the two parties will sign a new joint development contract according to the situation. Both parties have realized the unlimited business opportunities brought by artificial intelligence, so they have targeted the cooperation direction of phase change memory towards artificial intelligence applications. The most recent contract was signed in October 2021, and Macronix also announced relevant content through major information

Macronix announced at the time that the company would continue to participate in IBM's phase-change memory joint development plan and had obtained authorization for specific analog artificial intelligence technology. The contract is valid from January 22, 2022 to January 21, 2025. During the cooperation period, Macronix will assume confidentiality obligations and jointly share research and development costs, while complying with U.S. export control laws and other related obligations. The specific purpose of this cooperation is to continue investing in the development of advanced technologies and have a positive impact on Macronix’s technology and competitiveness

Phase change memory is analyzed by industry insiders as having characteristics such as fast speed, non-volatility, and low power, making it an ideal choice for high-density memory that can fill the price and performance gap between DRAM and NAND required for AI servers. Gap

Regarding the latest progress in cooperating with IBM on phase change memory, Macronix stated on the 29th that the project is proceeding smoothly and the development direction of advanced applications such as AI has been determined

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