Can Yi 1.5 6B Chat run on RX 6800 16GB?

YES — Runs Great

C51Usable

Estimated from fit model

Yi 1.5 6B Chat needs ~6.9 GB VRAM. RX 6800 16GB has 16.0 GB. With Q4_K_M quantization, expect ~77 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: MediumStack: 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) — 6.9 GB, 76.9 tok/s, Runs well

6.9 GB required16.0 GB available

43% VRAM used

Fit status

Runs well

Decode

76.9 tok/s

TTFT

2516 ms

Safe context

224K

Memory

6.9 GB / 16.0 GB

Memory breakdown

Weights3.7 GB

KV Cache0.7 GB

Runtime0.9 GB

Headroom1.6 GB

See how fast it feels

See how fast it feelsYi 1.5 6B Chat on RX 6800 16GB
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: 76.9 tok/s decode · 2.5s TTFT (warm) · 192 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	76.9 tok/s	1373 ms	224K
Coding	C	Runs well	76.9 tok/s	2516 ms	224K
Agentic Coding	C	Runs well	76.9 tok/s	3660 ms	224K
Reasoning	C	Runs well	76.9 tok/s	2974 ms	224K
RAG	C	Runs well	76.9 tok/s	4575 ms	224K

Quantization options

How Yi 1.5 6B Chat (6B params) fits at each quantization level on RX 6800 16GB (16.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.3 GB	Low	C46
Q3_K_S	3	2.9 GB	Low	C47
NVFP4	4	3.4 GB	Medium	C47
Q4_K_M	4	3.7 GB	Medium	C48
Q5_K_M	5	4.3 GB	High	C48
Q6_K	6	4.9 GB	High	C49
Q8_0	8	6.4 GB	Very High	C50
F16Best for your GPU	16	12.3 GB	Maximum	C51

Get started

Copy-paste commands to run Yi 1.5 6B Chat on your machine.

Run

lms load hf-maziyarpanahi--yi-1-5-6b-chat-gguf && lms server start

Frequently asked questions

Can RX 6800 16GB run Yi 1.5 6B Chat?

Yes, RX 6800 16GB can run Yi 1.5 6B Chat with a C grade (Runs well). Expected decode speed: 76.9 tok/s.

How much VRAM does Yi 1.5 6B Chat need?

Yi 1.5 6B Chat (6B parameters) requires approximately 6.9 GB of memory with Q4_K_M quantization.

What is the best quantization for Yi 1.5 6B Chat?

The recommended quantization for Yi 1.5 6B Chat is Q4_K_M, which balances quality and memory efficiency.

What speed will Yi 1.5 6B Chat run at on RX 6800 16GB?

On RX 6800 16GB, Yi 1.5 6B Chat achieves approximately 76.9 tokens per second decode speed with a time-to-first-token of 2516ms using Q4_K_M quantization.

Can RX 6800 16GB run Yi 1.5 6B Chat for coding?

For coding workloads, Yi 1.5 6B Chat on RX 6800 16GB receives a C grade with 76.9 tok/s and 224K context.

What context window can Yi 1.5 6B Chat use on RX 6800 16GB?

On RX 6800 16GB, Yi 1.5 6B Chat can safely use up to 224K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for RX 6800 16GB See all hardware for Yi 1.5 6B Chat

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