Can Qwen 3 8B run on Radeon RX 6850M XT 12GB?

YES — Runs Great

S95Excellent

Estimated from fit model

Qwen 3 8B needs ~9.2 GB VRAM. Radeon RX 6850M XT 12GB has 12.0 GB. With Q4_K_M quantization, expect ~53 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: LowStack: 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) — 9.2 GB, 53.3 tok/s, Runs well

9.2 GB required12.0 GB available

77% VRAM used

Fit status

Runs well

Decode

53.3 tok/s

TTFT

3633 ms

Safe context

37K

Memory

9.2 GB / 12.0 GB

Memory breakdown

Weights4.9 GB

KV Cache2.2 GB

Runtime0.9 GB

Headroom1.2 GB

See how fast it feels

See how fast it feelsQwen 3 8B on Radeon RX 6850M XT 12GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step.

Given information:
  - Speed = 60 mph (miles per hour)
  - Time  = 2.5 hours

Formula: Distance = Speed x Time

Calculation:
  Distance = 60 mph x 2.5 h
           = 150 miles

The train travels 150 miles.

Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time.

Breakdown:
  - First half: 1.25 hours at 60 mph = 75 miles
  - Stop: 20 minutes (no distance)
  - Second half: 1.25 hours at 60 mph = 75 miles

Total distance: 150 miles (same)
Total time: 2.5 h + 0.33 h = 2.83 hours
Average speed: 150 / 2.83 = 53 mph

The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 53.3 tok/s decode · 3.6s TTFT (warm) · 133 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	53.3 tok/s	1982 ms	37K
Coding	S	Runs well	53.3 tok/s	3633 ms	37K
Agentic Coding	S	Tight fit	53.3 tok/s	5284 ms	37K
Reasoning	S	Runs well	53.3 tok/s	4293 ms	37K
RAG	S	Tight fit	53.3 tok/s	6605 ms	37K

Quantization options

How Qwen 3 8B (8B params) fits at each quantization level on Radeon RX 6850M XT 12GB (12.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.1 GB	Low	S89
Q3_K_S	3	3.9 GB	Low	S90
NVFP4	4	4.5 GB	Medium	S91
Q4_K_M	4	4.9 GB	Medium	S92
Q5_K_M	5	5.8 GB	High	S92
Q6_K	6	6.6 GB	High	S92
Q8_0Best for your GPU	8	8.6 GB	Very High	S91
F16	16	16.4 GB	Maximum	F0

Get started

Copy-paste commands to run Qwen 3 8B on your machine.

Run

ollama run qwen3:8b

Your hardware

More models your Radeon RX 6850M XT 12GB can run

Model	Params	Grade	Decode	Capabilities
Qwen 3.5 9B	9B	S	47.4 tok/s
Qwen 3 14B	14B	A	19.1 tok/s

Frequently asked questions

Can Radeon RX 6850M XT 12GB run Qwen 3 8B?

Yes, Radeon RX 6850M XT 12GB can run Qwen 3 8B with a S grade (Runs well). Expected decode speed: 53.3 tok/s.

How much VRAM does Qwen 3 8B need?

Qwen 3 8B (8B parameters) requires approximately 9.2 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen 3 8B?

The recommended quantization for Qwen 3 8B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen 3 8B run at on Radeon RX 6850M XT 12GB?

On Radeon RX 6850M XT 12GB, Qwen 3 8B achieves approximately 53.3 tokens per second decode speed with a time-to-first-token of 3633ms using Q4_K_M quantization.

Can Radeon RX 6850M XT 12GB run Qwen 3 8B for coding?

For coding workloads, Qwen 3 8B on Radeon RX 6850M XT 12GB receives a S grade with 53.3 tok/s and 37K context.

What context window can Qwen 3 8B use on Radeon RX 6850M XT 12GB?

On Radeon RX 6850M XT 12GB, Qwen 3 8B can safely use up to 37K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

See all results for Radeon RX 6850M XT 12GB See all hardware for Qwen 3 8B

Embed this result▼

Paste this snippet into any page to show a live fit card.

<iframe src="https://willitrunai.com/embed/qwen-3-8b-on-rx-6850m-xt-12gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>

Preview:

Workload

Grade

Fit

Decode

TTFT

Context

Chat

Runs well

53.3 tok/s

1982 ms

37K

Coding

Runs well

53.3 tok/s

3633 ms

37K

Agentic Coding

Tight fit

53.3 tok/s

5284 ms

37K

Reasoning

Runs well

53.3 tok/s

4293 ms

37K

RAG

Tight fit

53.3 tok/s

6605 ms

37K

Quantization options

How Qwen 3 8B (8B params) fits at each quantization level on Radeon RX 6850M XT 12GB (12.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.1 GB	Low	S89
Q3_K_S	3	3.9 GB	Low	S90
NVFP4	4	4.5 GB	Medium	S91
Q4_K_M	4	4.9 GB	Medium	S92
Q5_K_M	5	5.8 GB	High	S92
Q6_K	6	6.6 GB	High	S92
Q8_0Best for your GPU	8	8.6 GB	Very High	S91
F16	16	16.4 GB	Maximum	F0

Model

Params

Grade

Decode

Capabilities

Qwen 3.5 9B

47.4 tok/s

Qwen 3 14B

14B

19.1 tok/s

Frequently asked questions

Can Radeon RX 6850M XT 12GB run Qwen 3 8B?

Yes, Radeon RX 6850M XT 12GB can run Qwen 3 8B with a S grade (Runs well). Expected decode speed: 53.3 tok/s.

How much VRAM does Qwen 3 8B need?

Qwen 3 8B (8B parameters) requires approximately 9.2 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen 3 8B?

The recommended quantization for Qwen 3 8B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen 3 8B run at on Radeon RX 6850M XT 12GB?

On Radeon RX 6850M XT 12GB, Qwen 3 8B achieves approximately 53.3 tokens per second decode speed with a time-to-first-token of 3633ms using Q4_K_M quantization.

Can Radeon RX 6850M XT 12GB run Qwen 3 8B for coding?

For coding workloads, Qwen 3 8B on Radeon RX 6850M XT 12GB receives a S grade with 53.3 tok/s and 37K context.

What context window can Qwen 3 8B use on Radeon RX 6850M XT 12GB?

On Radeon RX 6850M XT 12GB, Qwen 3 8B can safely use up to 37K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.