Can Granite Code 20B run on NVIDIA H800 80GB?

YES — Runs Great

A78Great

Estimated from fit model

Granite Code 20B needs ~24.6 GB VRAM. NVIDIA H800 80GB has 80.0 GB. With Q4_K_M quantization, expect ~215 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: HighStack: BasicBottleneck: 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) — 24.6 GB, 215.1 tok/s, Runs well

24.6 GB required80.0 GB available

31% VRAM used

Fit status

Runs well

Decode

215.1 tok/s

TTFT

900 ms

Safe context

Memory

24.6 GB / 80.0 GB

Memory breakdown

Weights12.2 GB

KV Cache3.2 GB

Runtime1.2 GB

Headroom8.0 GB

See how fast it feels

See how fast it feelsGranite Code 20B on NVIDIA H800 80GB
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: 215.1 tok/s decode · 900ms TTFT (warm) · 538 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	215.1 tok/s	491 ms	8K
Coding	A	Runs well	215.1 tok/s	900 ms	8K
Agentic Coding	A	Runs well	215.1 tok/s	1309 ms	8K
Reasoning	A	Runs well	215.1 tok/s	1064 ms	8K
RAG	A	Runs well	215.1 tok/s	1636 ms	8K

Quantization options

How Granite Code 20B (20B params) fits at each quantization level on NVIDIA H800 80GB (80.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	7.8 GB	Low	B70
Q3_K_S	3	9.8 GB	Low	B70
NVFP4	4	11.2 GB	Medium	B70
Q4_K_M	4	12.2 GB	Medium	A70
Q5_K_M	5	14.4 GB	High	A70
Q6_K	6	16.4 GB	High	A71
Q8_0	8	21.4 GB	Very High	A72
F16Best for your GPU	16	41.0 GB	Maximum	A76

Get started

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

Run

ollama run granite-code:20b

Your hardware

More models your NVIDIA H800 80GB can run

Model	Params	Grade	Decode
Devstral 2 123B Instruct	123B	A	24.9 tok/s
Qwen3-Coder 30B A3B Instruct	30.5B	S	367.4 tok/s
Qwen 3.5 27B	27B	S	159.3 tok/s
Qwen 3.6 27B	27B	S	159.8 tok/s
Qwen 3.5 122B A10B	122B	S	73.9 tok/s

Frequently asked questions

Can NVIDIA H800 80GB run Granite Code 20B?

Yes, NVIDIA H800 80GB can run Granite Code 20B with a A grade (Runs well). Expected decode speed: 215.1 tok/s.

How much VRAM does Granite Code 20B need?

Granite Code 20B (20B parameters) requires approximately 24.6 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 NVIDIA H800 80GB?

On NVIDIA H800 80GB, Granite Code 20B achieves approximately 215.1 tokens per second decode speed with a time-to-first-token of 900ms using Q4_K_M quantization.

Can NVIDIA H800 80GB run Granite Code 20B for coding?

For coding workloads, Granite Code 20B on NVIDIA H800 80GB receives a A grade with 215.1 tok/s and 8K context.

What context window can Granite Code 20B use on NVIDIA H800 80GB?

On NVIDIA H800 80GB, 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 NVIDIA H800 80GB See all hardware for Granite Code 20B

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Preview:

Workload

Grade

Fit

Decode

TTFT

Context

Chat

Runs well

215.1 tok/s

491 ms

Coding

Runs well

215.1 tok/s

900 ms

Agentic Coding

Runs well

215.1 tok/s

1309 ms

Reasoning

Runs well

215.1 tok/s

1064 ms

RAG

Runs well

215.1 tok/s

1636 ms

Quantization options

How Granite Code 20B (20B params) fits at each quantization level on NVIDIA H800 80GB (80.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	7.8 GB	Low	B70
Q3_K_S	3	9.8 GB	Low	B70
NVFP4	4	11.2 GB	Medium	B70
Q4_K_M	4	12.2 GB	Medium	A70
Q5_K_M	5	14.4 GB	High	A70
Q6_K	6	16.4 GB	High	A71
Q8_0	8	21.4 GB	Very High	A72
F16Best for your GPU	16	41.0 GB	Maximum	A76

Model

Params

Grade

Decode

Capabilities

Devstral 2 123B Instruct

123B

24.9 tok/s

Qwen3-Coder 30B A3B Instruct

30.5B

367.4 tok/s

Qwen 3.5 27B

27B

159.3 tok/s

Qwen 3.6 27B

27B

159.8 tok/s

Qwen 3.5 122B A10B

122B

73.9 tok/s

Frequently asked questions

Can NVIDIA H800 80GB run Granite Code 20B?

Yes, NVIDIA H800 80GB can run Granite Code 20B with a A grade (Runs well). Expected decode speed: 215.1 tok/s.

How much VRAM does Granite Code 20B need?

Granite Code 20B (20B parameters) requires approximately 24.6 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 NVIDIA H800 80GB?

On NVIDIA H800 80GB, Granite Code 20B achieves approximately 215.1 tokens per second decode speed with a time-to-first-token of 900ms using Q4_K_M quantization.

Can NVIDIA H800 80GB run Granite Code 20B for coding?

For coding workloads, Granite Code 20B on NVIDIA H800 80GB receives a A grade with 215.1 tok/s and 8K context.

What context window can Granite Code 20B use on NVIDIA H800 80GB?

On NVIDIA H800 80GB, 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.