Will It Run AI

Can Mixtral 8x7B run on AMD Instinct MI325X 256GB?

YES — Runs Great

B62Good
Estimated from fit model

Mixtral 8x7B needs ~57.1 GB VRAM. AMD Instinct MI325X 256GB has 256.0 GB. With Q4_K_M quantization, expect ~315 tok/s.

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

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) — 57.1 GB, 315.1 tok/s, Runs well
57.1 GB required256.0 GB available
22% VRAM used

Fit status

Runs well

Decode

315.1 tok/s

TTFT

614 ms

Safe context

33K

Memory

57.1 GB / 256.0 GB

Memory breakdown

Weights28.7 GB
KV Cache2.0 GB
Runtime0.9 GB
Headroom25.6 GB

See how fast it feels

See how fast it feelsMixtral 8x7B on AMD Instinct MI325X 256GB
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: 315.1 tok/s decode · 614ms TTFT (warm) · 788 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

WorkloadGradeFitDecodeTTFTContext
ChatBRuns well315.1 tok/s350 ms33K
CodingBRuns well315.1 tok/s614 ms33K
Agentic CodingBRuns well315.1 tok/s894 ms33K
ReasoningBRuns well315.1 tok/s726 ms33K
RAGBRuns well315.1 tok/s1117 ms33K

Quantization options

How Mixtral 8x7B (47B params) fits at each quantization level on AMD Instinct MI325X 256GB (256.0 GB usable).

QuantBitsVRAMQualityFit
Q2_K
2
18.3 GB
LowC52
Q3_K_S
3
23.0 GB
LowC53
NVFP4
4
26.3 GB
MediumC53
Q4_K_M
4
28.7 GB
MediumC53
Q5_K_M
5
33.8 GB
HighC54
Q6_K
6
38.5 GB
HighC54
Q8_0
8
50.3 GB
Very HighC55
F16Best for your GPU
16
96.4 GB
MaximumB59

Get started

Copy-paste commands to run Mixtral 8x7B on your machine.

Run

ollama run mixtral

Frequently asked questions

Can AMD Instinct MI325X 256GB run Mixtral 8x7B?

Yes, AMD Instinct MI325X 256GB can run Mixtral 8x7B with a B grade (Runs well). Expected decode speed: 315.1 tok/s.

How much VRAM does Mixtral 8x7B need?

Mixtral 8x7B (47B parameters) requires approximately 57.1 GB of memory with Q4_K_M quantization.

What is the best quantization for Mixtral 8x7B?

The recommended quantization for Mixtral 8x7B is Q4_K_M, which balances quality and memory efficiency.

What speed will Mixtral 8x7B run at on AMD Instinct MI325X 256GB?

On AMD Instinct MI325X 256GB, Mixtral 8x7B achieves approximately 315.1 tokens per second decode speed with a time-to-first-token of 614ms using Q4_K_M quantization.

Can AMD Instinct MI325X 256GB run Mixtral 8x7B for coding?

For coding workloads, Mixtral 8x7B on AMD Instinct MI325X 256GB receives a B grade with 315.1 tok/s and 33K context.

What context window can Mixtral 8x7B use on AMD Instinct MI325X 256GB?

On AMD Instinct MI325X 256GB, Mixtral 8x7B can safely use up to 33K tokens of context. The model's official context limit is 33K, but available memory constrains the safe maximum.

See all results for AMD Instinct MI325X 256GBSee all hardware for Mixtral 8x7B
Embed this result▼

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

<iframe src="https://willitrunai.com/embed/mixtral-8x7b-on-instinct-mi325x-256gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>

Preview: