AMD Instinct MI355X 288GB — Benchmarks & Specs
Bottom line: how fast is the AMD Instinct MI355X 288GB?
For local LLM inference it generates 103480.0 tokens/sec running llama2:70b at FP4 under vllm, per AMD ROCm Blog. Its 288 GB of VRAM is the binding constraint for local inference: that capacity fits 70B-parameter open-weight models at Q4 without offloading.
Every figure above is a row in the tables below, and each row links out to the review or public benchmark database the number was taken from. SpecPicks aggregates published measurements; it does not report first-party benchmark runs.
The AMD Instinct MI355X 288GB is a graphics card from the CDNA 4 family released in 2025 from AMD. Key on-paper specs include 288 GB of GDDR VRAM, 1400W TDP. Data on this page draws on 12 community AI inference reports, aggregated from public benchmark databases (TechPowerUp, PassMark, Geekbench, Cinebench) and the LocalLLaMA community. Read this page when shopping the AMD Instinct MI355X 288GB, comparing it against other graphics cards in your build, or sizing it for a specific workload (gaming at 1080p/1440p/4K, productivity benchmarks, or local LLM inference).
AI Inference Performance
Tokens per second under each model + quantization. Higher = faster generation. Bars compare runs across the same model.
| Model | Quantization | Relative | Tokens/sec | VRAM used | Source |
|---|---|---|---|---|---|
| llama2:70b | FP4 vllm | 103480.0 tok/s | — | AMD ROCm Blog 2026-04-01 | |
| llama2:70b | MXFP4 vllm | 103480.0 tok/s | — | AMD ROCm Blog 2026-04-01 | |
| gpt-oss-120b | MXFP4 vllm | 95004.0 tok/s | — | AMD ROCm Blog 2026-04-01 | |
| qwen3-235b-a22b | FP8 vllm | 14043.0 tok/s | — | Metrum AI 2026-01-01 | |
| llama2:70b | FP4 other | 12535.0 tok/s | — | StorageReview 2026-04-01 | |
| llama2:70b | FP4 vllm | 12535.0 tok/s | — | AMD ROCm Blogs (MLPerf Inference v6.0) 2026-04-01 | |
| gpt-oss-120b | FP4 vllm | 10267.0 tok/s | — | AMD ROCm Blogs (MLPerf Inference v6.0) 2026-04-01 | |
| kimi-k2.5 | FP4 vllm | 2687.0 tok/s | — | InferenceX by SemiAnalysis 2026-06-01 | |
| deepseek-r1-0528:671b | MXFP4 sglang | 2436.0 tok/s | — | LMSYS Org 2026-05-28 | |
| deepseek-r1:671b | MXFP4 sglang | 2436.0 tok/s | — | LMSYS Org 2026-05-28 | |
| deepseek-r1:671b | FP4 sglang | 2436.0 tok/s | — | LMSYS 2026-05-28 | |
| deepseek-r1:671b | FP8 sglang | 2378.0 tok/s | — | LMSYS 2026-05-28 |
Full Specifications
| tdp w | 1400 |
|---|---|
| cooling | direct liquid |
| vram gb | 288 |
| fp4 tflops | 20100 |
| fp6 tflops | 20100 |
| fp8 tflops | 10100 |
| process nm | 3 |
| fp16 tflops | 5000 |
| fp64 tflops | 78.6 |
| memory type | HBM3E |
| compute units | 256 |
| memory bandwidth gbps | 8000 |
AMD Instinct MI355X 288GB — Frequently Asked Questions
What is the AMD Instinct MI355X 288GB best used for?
When was the AMD Instinct MI355X 288GB released, and what was its launch MSRP?
Where do the benchmark numbers on this page come from?
Can the AMD Instinct MI355X 288GB run local LLMs?
Where can I buy the AMD Instinct MI355X 288GB?
Buying guides that rank the AMD Instinct MI355X 288GB's class
This page is the raw performance data. The guides below turn it into a ranked pick for a specific build.
Editorial guides covering the AMD Instinct MI355X 288GB
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