Can Yi 1.5 9B run on Radeon PRO W7900 DS 48GB?

YES — Runs Great

C52Usable

Estimated from fit model

Yi 1.5 9B needs ~12.7 GB VRAM. Radeon PRO W7900 DS 48GB has 48.0 GB. With Q4_K_M quantization, expect ~93 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) — 12.7 GB, 101.0 tok/s, Runs well

12.7 GB required48.0 GB available

26% VRAM used

Fit status

Runs well

Decode

101.0 tok/s

TTFT

1917 ms

Safe context

Memory

12.7 GB / 48.0 GB

Memory breakdown

Weights5.5 GB

KV Cache1.5 GB

Runtime0.9 GB

Headroom4.8 GB

See how fast it feels

See how fast it feelsYi 1.5 9B on Radeon PRO W7900 DS 48GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 101.0 tok/s decode · 1.9s TTFT (warm) · 252 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	C	Runs well	101.0 tok/s	1046 ms	4K
Coding	C	Runs well	92.9 tok/s	2085 ms	4K
Agentic Coding	C	Runs well	101.0 tok/s	2789 ms	4K
Reasoning	C	Runs well	101.0 tok/s	2266 ms	4K
RAG	C	Runs well	101.0 tok/s	3486 ms	4K

Quantization options

How Yi 1.5 9B (9B params) fits at each quantization level on Radeon PRO W7900 DS 48GB (48.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.5 GB	Low	C46
Q3_K_S	3	4.4 GB	Low	C46
NVFP4	4	5.0 GB	Medium	C46
Q4_K_M	4	5.5 GB	Medium	C46
Q5_K_M	5	6.5 GB	High	C46
Q6_K	6	7.4 GB	High	C47
Q8_0	8	9.6 GB	Very High	C47
F16Best for your GPU	16	18.5 GB	Maximum	C50

Get started

Copy-paste commands to run Yi 1.5 9B on your machine.

Run

lms load Yi-1.5-9B-Chat && lms server start

Frequently asked questions

Can Radeon PRO W7900 DS 48GB run Yi 1.5 9B?

Yes, Radeon PRO W7900 DS 48GB can run Yi 1.5 9B with a C grade (Runs well). Expected decode speed: 92.9 tok/s.

How much VRAM does Yi 1.5 9B need?

Yi 1.5 9B (9B parameters) requires approximately 12.7 GB of memory with Q4_K_M quantization.

What is the best quantization for Yi 1.5 9B?

The recommended quantization for Yi 1.5 9B is Q4_K_M, which balances quality and memory efficiency.

What speed will Yi 1.5 9B run at on Radeon PRO W7900 DS 48GB?

On Radeon PRO W7900 DS 48GB, Yi 1.5 9B achieves approximately 92.9 tokens per second decode speed with a time-to-first-token of 2085ms using Q4_K_M quantization.

Can Radeon PRO W7900 DS 48GB run Yi 1.5 9B for coding?

For coding workloads, Yi 1.5 9B on Radeon PRO W7900 DS 48GB receives a C grade with 92.9 tok/s and 4K context.

What context window can Yi 1.5 9B use on Radeon PRO W7900 DS 48GB?

On Radeon PRO W7900 DS 48GB, Yi 1.5 9B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.

See all results for Radeon PRO W7900 DS 48GB See all hardware for Yi 1.5 9B

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