MI355X
MI355X is an AMD GPU based on the CDNA 4 architecture, first released in 2025.
Built from BenchGecko data as of April 14, 2026 · updates when the data changes
MI355X is an AMD GPU based on the CDNA 4 architecture, first released in 2025.
Basic
The AMD Instinct MI355X is an AI GPU made by AMD, codenamed Altair. Peak throughput is 2,300 TFLOPS at FP16/BF16 and 4,600 TFLOPS at FP8. It carries 288 GB of HBM3e with 8 TB/s of memory bandwidth. Rated power (TDP) is 1,400 W. It is built on N3 at TSMC.
Deep
In the BenchGecko dataset it sits in the frontier tier: current-generation flagship silicon shipping at scale to hyperscalers. It follows the MI325X. Disclosed buyers include Meta. Specs come from manufacturer datasheets; the spec card on this page shows the dataset values and their as-of date.
Expert
That is 1.64 FP16 TFLOPS per watt. Memory bandwidth per unit of compute is 3.48 GB/s per FP16 TFLOP: a higher ratio helps memory-bound inference, while peak TFLOPS matter more for compute-bound training. Fabrication: Taiwan. Real throughput depends on the model, precision, batch size and software stack, so compare tokens per second per dollar for your own workload.
Depending on why you're here
- ·MI355X: 2,300 TFLOPS FP16/BF16 · 4,600 TFLOPS FP8
- ·Process: N3 at TSMC
- ·Tier: frontier
- ·288 GB of HBM3e per chip
- ·No public cloud listing for MI355X in the dataset
- ·Compare it with other chips on /hardware/mi355x
- ·Disclosed buyers: Meta
- ·AMD · fabbed at TSMC
- ·Supply tightness is tracked on /hardware
- ·MI355X is a chip built to run AI, made by AMD
- ·It has 288 GB of fast memory so large models fit
- ·Companies buy or rent these to train and serve AI models
Frequently Asked Questions
Read the primary sources
- CDNA 4 announcementwww.amd.com