Can Dolphin3.0 Llama3.1 8B run on RX 7900 XT 20GB?

YES — Runs Great

C51Usable

Estimated from fit model

Dolphin3.0 Llama3.1 8B needs ~8.7 GB VRAM. RX 7900 XT 20GB has 20.0 GB. With Q4_K_M quantization, expect ~98 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) — 8.7 GB, 98.4 tok/s, Runs well

8.7 GB required20.0 GB available

43% VRAM used

Fit status

Runs well

Decode

98.4 tok/s

TTFT

1968 ms

Safe context

209K

Memory

8.7 GB / 20.0 GB

Memory breakdown

Weights4.9 GB

KV Cache0.9 GB

Runtime0.9 GB

Headroom2.0 GB

See how fast it feels

See how fast it feelsDolphin3.0 Llama3.1 8B on RX 7900 XT 20GB
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: 98.4 tok/s decode · 2.0s TTFT (warm) · 246 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	98.4 tok/s	1074 ms	209K
Coding	C	Runs well	98.4 tok/s	1968 ms	209K
Agentic Coding	C	Runs well	98.4 tok/s	2863 ms	209K
Reasoning	C	Runs well	98.4 tok/s	2326 ms	209K
RAG	C	Runs well	98.4 tok/s	3579 ms	209K

Inference speed

Dolphin3.0 Llama3.1 8B inference speed — tokens per second by GPU & Mac

Estimated decode speed (tokens/sec) for Dolphin3.0 Llama3.1 8B at Q4_K_M across popular GPUs and Apple Silicon, using the fastest local runtime per device. Fastest is RTX 5090 32GB at ~112 tok/s. Speed is memory-bandwidth bound, so cards that fit the whole model in VRAM run far faster than ones that offload to system RAM.

GPU / Mac	Memory	Quant	Speed (tok/s)	Fits?
RTX 5090 32GB	32 GB	Q4_K_M	112.0	Fits
RTX 4090 24GB	24 GB	Q4_K_M	112.0	Fits
RTX 4080 Super 16GB	16 GB	Q4_K_M	112.0	Fits
RTX 3090 24GB	24 GB	Q4_K_M	112.0	Fits
RX 7900 XTX 24GB	24 GB	Q4_K_M	112.0	Fits
Mac Studio M3 Ultra 256GB	256 GB	Q4_K_M	112.0	Fits
Mac Studio M2 Ultra 128GB	128 GB	Q4_K_M	95.1	Fits
Mac Studio M1 Ultra 128GB	128 GB	Q4_K_M	90.2	Fits
RTX 4070 12GB	12 GB	Q4_K_M	77.5	Fits
MacBook Pro M4 Max 128GB	128 GB	Q4_K_M	76.8	Fits
MacBook Pro M4 Max 64GB	64 GB	Q4_K_M	76.8	Fits
MacBook Pro M3 Max 64GB	64 GB	Q4_K_M	49.2	Fits
RTX 3060 12GB	12 GB	Q4_K_M	48.7	Fits
MacBook Pro M1 Max 64GB	64 GB	Q4_K_M	45.1	Fits
RTX 4060 8GB	8 GB	Q4_K_M	40.7	Offloads
MacBook Pro M4 Pro 48GB	48 GB	Q4_K_M	39.6	Fits

Estimates for single-stream decoding at Q4_K_M; real tokens/sec varies with prompt length, context, batch size, and runtime build. Prompt processing (prefill) is faster than the decode figures shown here.

Quantization options

How Dolphin3.0 Llama3.1 8B (8B params) fits at each quantization level on RX 7900 XT 20GB (20.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.1 GB	Low	C46
Q3_K_S	3	3.9 GB	Low	C46
NVFP4	4	4.5 GB	Medium	C47
Q4_K_M	4	4.9 GB	Medium	C47
Q5_K_M	5	5.8 GB	High	C48
Q6_K	6	6.6 GB	High	C48
Q8_0Best for your GPU	8	8.6 GB	Very High	C50
F16	16	16.4 GB	Maximum	F0

Get started

Copy-paste commands to run Dolphin3.0 Llama3.1 8B on your machine.

Run

lms load hf-dphn--dolphin3-0-llama3-1-8b-gguf && lms server start

Frequently asked questions

Can RX 7900 XT 20GB run Dolphin3.0 Llama3.1 8B?

Yes, RX 7900 XT 20GB can run Dolphin3.0 Llama3.1 8B with a C grade (Runs well). Expected decode speed: 98.4 tok/s.

How much VRAM does Dolphin3.0 Llama3.1 8B need?

Dolphin3.0 Llama3.1 8B (8B parameters) requires approximately 8.7 GB of memory with Q4_K_M quantization.

What is the best quantization for Dolphin3.0 Llama3.1 8B?

The recommended quantization for Dolphin3.0 Llama3.1 8B is Q4_K_M, which balances quality and memory efficiency.

What speed will Dolphin3.0 Llama3.1 8B run at on RX 7900 XT 20GB?

On RX 7900 XT 20GB, Dolphin3.0 Llama3.1 8B achieves approximately 98.4 tokens per second decode speed with a time-to-first-token of 1968ms using Q4_K_M quantization.

Can RX 7900 XT 20GB run Dolphin3.0 Llama3.1 8B for coding?

For coding workloads, Dolphin3.0 Llama3.1 8B on RX 7900 XT 20GB receives a C grade with 98.4 tok/s and 209K context.

What context window can Dolphin3.0 Llama3.1 8B use on RX 7900 XT 20GB?

On RX 7900 XT 20GB, Dolphin3.0 Llama3.1 8B can safely use up to 209K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for RX 7900 XT 20GB See all hardware for Dolphin3.0 Llama3.1 8B

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