Can Granite Code 20B run on AMD Instinct MI250X 128GB?

YES — Runs Great

A76Great

Estimated from fit model

Granite Code 20B needs ~29.1 GB VRAM. AMD Instinct MI250X 128GB has 128.0 GB. With Q4_K_M quantization, expect ~221 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) — 29.1 GB, 221.0 tok/s, Runs well

29.1 GB required128.0 GB available

23% VRAM used

Fit status

Runs well

Decode

221.0 tok/s

TTFT

876 ms

Safe context

Memory

29.1 GB / 128.0 GB

Memory breakdown

Weights12.2 GB

KV Cache3.2 GB

Runtime0.9 GB

Headroom12.8 GB

See how fast it feels

See how fast it feelsGranite Code 20B on AMD Instinct MI250X 128GB
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: 221.0 tok/s decode · 876ms TTFT (warm) · 552 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	A	Runs well	221.0 tok/s	478 ms	8K
Coding	A	Runs well	221.0 tok/s	876 ms	8K
Agentic Coding	A	Runs well	221.0 tok/s	1274 ms	8K
Reasoning	A	Runs well	221.0 tok/s	1035 ms	8K
RAG	A	Runs well	221.0 tok/s	1593 ms	8K

Quantization options

How Granite Code 20B (20B params) fits at each quantization level on AMD Instinct MI250X 128GB (128.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	7.8 GB	Low	B68
Q3_K_S	3	9.8 GB	Low	B68
NVFP4	4	11.2 GB	Medium	B68
Q4_K_M	4	12.2 GB	Medium	B68
Q5_K_M	5	14.4 GB	High	B68
Q6_K	6	16.4 GB	High	B68
Q8_0	8	21.4 GB	Very High	B69
F16Best for your GPU	16	41.0 GB	Maximum	A72

Get started

Copy-paste commands to run Granite Code 20B on your machine.

Run

ollama run granite-code:20b

Your hardware

More models your AMD Instinct MI250X 128GB can run

Model	Params	Grade	Decode
Devstral 2 123B Instruct	123B	S	36.2 tok/s
Qwen3-Coder 30B A3B Instruct	30.5B	S	377.4 tok/s
Qwen 3.5 27B	27B	S	163.7 tok/s
Qwen 3.6 27B	27B	S	102 tok/s
Qwen 3.5 122B A10B	122B	S	100.3 tok/s

Frequently asked questions

Can AMD Instinct MI250X 128GB run Granite Code 20B?

Yes, AMD Instinct MI250X 128GB can run Granite Code 20B with a A grade (Runs well). Expected decode speed: 221.0 tok/s.

How much VRAM does Granite Code 20B need?

Granite Code 20B (20B parameters) requires approximately 29.1 GB of memory with Q4_K_M quantization.

What is the best quantization for Granite Code 20B?

The recommended quantization for Granite Code 20B is Q4_K_M, which balances quality and memory efficiency.

What speed will Granite Code 20B run at on AMD Instinct MI250X 128GB?

On AMD Instinct MI250X 128GB, Granite Code 20B achieves approximately 221.0 tokens per second decode speed with a time-to-first-token of 876ms using Q4_K_M quantization.

Can AMD Instinct MI250X 128GB run Granite Code 20B for coding?

For coding workloads, Granite Code 20B on AMD Instinct MI250X 128GB receives a A grade with 221.0 tok/s and 8K context.

What context window can Granite Code 20B use on AMD Instinct MI250X 128GB?

On AMD Instinct MI250X 128GB, Granite Code 20B can safely use up to 8K tokens of context. The model's official context limit is 8K, but available memory constrains the safe maximum.

See all results for AMD Instinct MI250X 128GB See all hardware for Granite Code 20B

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