Can GPT-OSS 20B run on AMD Instinct MI210 64GB?

YES — Runs Great

S88Excellent

Estimated from fit model

GPT-OSS 20B needs ~22.6 GB VRAM. AMD Instinct MI210 64GB has 64.0 GB. With Q4_K_M quantization, expect ~214 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: HighStack: StandardBottleneck: Balanced

Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 22.6 GB, 213.8 tok/s, Runs well

22.6 GB required64.0 GB available

35% VRAM used

Fit status

Runs well

Decode

213.8 tok/s

TTFT

905 ms

Safe context

128K

Memory

22.6 GB / 64.0 GB

Memory breakdown

Weights12.8 GB

KV Cache2.4 GB

Runtime0.9 GB

Headroom6.4 GB

See how fast it feels

See how fast it feelsGPT-OSS 20B on AMD Instinct MI210 64GB
1st promptCold start — includes initialization
>Write a Python function to sort a list
Here's a Python function that sorts a list using quicksort:

def quicksort(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

# Example usage
numbers = [3, 6, 8, 10, 1, 2, 1]
print(quicksort(numbers))  # [1, 1, 2, 3, 6, 8, 10]

The algorithm picks a pivot, partitions the list into smaller, equal, and larger elements, then recursively sorts each partition and concatenates the results.
2nd promptWarm — model ready, no init overhead
>Now add type hints and a docstring
def quicksort(arr: list[int]) -> list[int]:
    """Sort a list using the quicksort algorithm.

    Args:
        arr: List of integers to sort.

    Returns:
        A new sorted list.
    """
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

Added type hints for the input and return type, plus a Google-style docstring.
Estimated: 213.8 tok/s decode · 905ms TTFT (warm) · 535 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

No major red flags

This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	S	Runs well	213.8 tok/s	494 ms	128K
Coding	S	Runs well	213.8 tok/s	905 ms	128K
Agentic Coding	S	Runs well	213.8 tok/s	1317 ms	128K
Reasoning	S	Runs well	213.8 tok/s	1070 ms	128K
RAG	S	Runs well	213.8 tok/s	1646 ms	128K

Quantization options

How GPT-OSS 20B (21B params) fits at each quantization level on AMD Instinct MI210 64GB (64.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	8.2 GB	Low	A80
Q3_K_S	3	10.3 GB	Low	A80
NVFP4	4	11.8 GB	Medium	A80
Q4_K_M	4	12.8 GB	Medium	A80
Q5_K_M	5	15.1 GB	High	A81
Q6_K	6	17.2 GB	High	A81
Q8_0	8	22.5 GB	Very High	A82
F16Best for your GPU	16	43.1 GB	Maximum	S86

Get started

Copy-paste commands to run GPT-OSS 20B on your machine.

Run

ollama run gpt-oss

Your hardware

More models your AMD Instinct MI210 64GB can run

Model	Params	Grade	Decode
Qwen3-Coder 30B A3B Instruct	30.5B	S	168.4 tok/s
Qwen 3.5 27B	27B	S	73 tok/s
Qwen 3.6 27B	27B	S	45.5 tok/s
Qwen 3.6 35B A3B	35B	S	141.5 tok/s
Qwen3-VL 30B A3B Instruct	30B	S	174.2 tok/s

Frequently asked questions

Can AMD Instinct MI210 64GB run GPT-OSS 20B?

Yes, AMD Instinct MI210 64GB can run GPT-OSS 20B with a S grade (Runs well). Expected decode speed: 213.8 tok/s.

How much VRAM does GPT-OSS 20B need?

GPT-OSS 20B (21B parameters) requires approximately 22.6 GB of memory with Q4_K_M quantization.

What is the best quantization for GPT-OSS 20B?

The recommended quantization for GPT-OSS 20B is Q4_K_M, which balances quality and memory efficiency.

What speed will GPT-OSS 20B run at on AMD Instinct MI210 64GB?

On AMD Instinct MI210 64GB, GPT-OSS 20B achieves approximately 213.8 tokens per second decode speed with a time-to-first-token of 905ms using Q4_K_M quantization.

Can AMD Instinct MI210 64GB run GPT-OSS 20B for coding?

For coding workloads, GPT-OSS 20B on AMD Instinct MI210 64GB receives a S grade with 213.8 tok/s and 128K context.

What context window can GPT-OSS 20B use on AMD Instinct MI210 64GB?

On AMD Instinct MI210 64GB, GPT-OSS 20B can safely use up to 128K tokens of context. The model's official context limit is 128K, but available memory constrains the safe maximum.

See all results for AMD Instinct MI210 64GB See all hardware for GPT-OSS 20B

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