Chips · accelerators · AMD

AMD Instinct MI355X · Instinct MI350

1,786 gigaflops of dense BF16 compute per watt, at 1,400 W

Shipped the third quarter of 2025; shipped by the first date promised. Epoch AI names it at no AI data center and no GPU cluster.

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Each figure in AMD’s own words

one chip, dense compute; memory is high-bandwidth memory
BF16, dense
2,500 TFLOPS Peak bfloat16 (BF16) Matrix Performance 2.5 PFLOPs AMD Instinct MI355X product page (2.5 PFLOPS on the page)
FP8, dense
5,000 TFLOPS Peak Open Compute Project Eight-bit Precision Matrix (OCP-FP8) Performance (E5M2, E4M3) 5 PFLOPs AMD Instinct MI355X product page (5 PFLOPS on the page)
FP4, dense
10,100 TFLOPS Peak Microscaling Four-bit Precision Matrix (MXFP4) Performance 10.1 PFLOPs AMD Instinct MI355X product page (10.1 PFLOPS on the page)
Memory
288 GB Dedicated Memory Size 288 GB AMD Instinct MI355X product page
Memory bandwidth
8 TB/s Peak Memory Bandwidth 8 TB/s AMD Instinct MI355X product page
Maximum power
1,400 W Typical Board Power (TBP) 1400W AMD Instinct MI355X product page
Compute per watt
1,786 GFLOPS/Wdense BF16 over maximum power; 3,571 GFLOPS/W at FP8

AMD's promises name the MI350 Series, not the MI355X alone. No readable AMD page gives the MI355X first-shipment date; the record uses the Q3 2025 earnings release, which credits MI350 Series GPU sales for the quarter's data center revenue.

2 dated promises and the shipment

each date links to the page it is quoted from
  1. 2 Jun 2024 Promised MI350 Series (CDNA 4) expected in 2025. The next-generation AMD CDNATM 4 architecture, expected in 2025, will power the AMD Instinct MI350 Series AMD Computex 2024 press release
  2. 10 Oct 2024 Promised MI350 Series availability in the second half of 2025. The AMD Instinct MI350 series accelerators are on track to be available during the second half of 2025 AMD Instinct MI325X launch press release
  3. the third quarter of 2025 Shipped: Q3 2025 data center revenue driven by MI350 Series GPU sales (the series includes the MI355X). Data Center segment revenue was $4.3 billion, up 22% year-over-year primarily driven by strong demand for 5th Gen AMD EPYCTM processors and AMD Instinct MI350 Series GPUs AMD third quarter 2025 financial results, 8-K exhibit 99.1

Named at no AI data center Epoch AI tracks

H100-equivalents and power are the whole site’s today, with every chip it holds

In no GPU cluster of Epoch AI’s list

Epoch AI’s list of AI supercomputers, which stops in July 2025

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