Will It Run AI

Can Vicuna 7B run on RX 6700 XT 12GB?

BARELY — Tight on Memory

D34Poor
Estimated from fit model

Vicuna 7B needs ~14.2 GB VRAM. RX 6700 XT 12GB has 12.0 GB. With Q4_K_M quantization, expect ~25 tok/s.

Runtime: llama.cppCapacity: OffloadBandwidth: LowStack: StandardBottleneck: Host offload
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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) — 14.2 GB, 24.7 tok/s, Very compromised (needs ~0.7 GB host RAM)
14.2 GB required12.0 GB available
118% VRAM needed

2.2 GB over capacity — needs offload or smaller quantization

Fit status

Very compromised (needs ~0.7 GB host RAM)

Decode

24.7 tok/s

TTFT

7847 ms

Safe context

4K

Memory

14.2 GB / 12.0 GB

Offload

20%

Memory breakdown

Weights4.3 GB
KV Cache7.8 GB
Runtime0.9 GB
Headroom1.2 GB

See how fast it feels

See how fast it feelsVicuna 7B on RX 6700 XT 12GB
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: 24.7 tok/s decode · 7.8s TTFT (warm) · 62 tok/s prefill

What limits this setup

It fits through host-memory offload, and offload is the main reason performance drops.

CPU or host-memory offload is active

About 20% of the working set spills out of accelerator memory, which usually hurts latency and sustained decode throughput.

Very little memory headroom

You can run the model, but there is not much room left for longer context, bigger batches, extra apps, or future model updates.

Best improvement path

Remove offload with more accelerator memory

Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.

Buy headroom, not only minimum fit

A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.

Increase host RAM if you keep offloading

This setup may need roughly {ram} GB of extra host RAM just for the offloaded portion, before OS and other tools.

Performance by workload

WorkloadGradeFitDecodeTTFTContext
ChatCTight fit46.8 tok/s2258 ms4K
CodingDVery compromised24.7 tok/s7847 ms4K
Agentic CodingFToo heavy9.8 tok/s28746 ms4K
ReasoningDVery compromised (needs ~0.7 GB host RAM)24.7 tok/s9274 ms4K
RAGFToo heavy9.8 tok/s35933 ms4K

Quantization options

How Vicuna 7B (7B params) fits at each quantization level on RX 6700 XT 12GB (12.0 GB usable).

QuantBitsVRAMQualityFit
Q2_K
2
2.7 GB
LowC50
Q3_K_S
3
3.4 GB
LowC50
NVFP4
4
3.9 GB
MediumC51
Q4_K_M
4
4.3 GB
MediumC52
Q5_K_M
5
5.0 GB
HighC53
Q6_K
6
5.7 GB
HighC53
Q8_0Best for your GPU
8
7.5 GB
Very HighC52
F16
16
14.3 GB
MaximumF0

Get started

Copy-paste commands to run Vicuna 7B on your machine.

Run

ollama run vicuna

Opções de upgrade

Hardware que roda bem Vicuna 7B

RX 7600 XT 16GBOpção econômica
16 GB VRAM (+4)
C
Removes host-memory offload, which is usually the single biggest latency and throughput win.39.1 tok/s decodificação

Removes host-memory offload, which is usually the single biggest latency and throughput win.

Raises estimated decode speed by about 58%.

~$329 MSRP

RX 9060 XT 16GBMelhor custo-benefício
16 GB VRAM (+4)
C
Removes host-memory offload, which is usually the single biggest latency and throughput win.47.2 tok/s decodificação

Removes host-memory offload, which is usually the single biggest latency and throughput win.

Raises estimated decode speed by about 91%.

~$349 MSRP

RX 9070 16GBUpgrade AMD
16 GB VRAM (+4)640 GB/s (+256)
C
Removes host-memory offload, which is usually the single biggest latency and throughput win.92.9 tok/s decodificação

Removes host-memory offload, which is usually the single biggest latency and throughput win.

Raises estimated decode speed by about 276%.

~$479 MSRP

Frequently asked questions

Can RX 6700 XT 12GB run Vicuna 7B?

Yes, RX 6700 XT 12GB can run Vicuna 7B with a D grade (Very compromised). Expected decode speed: 24.7 tok/s.

How much VRAM does Vicuna 7B need?

Vicuna 7B (7B parameters) requires approximately 14.2 GB of memory with Q4_K_M quantization.

What is the best quantization for Vicuna 7B?

The recommended quantization for Vicuna 7B is Q4_K_M, which balances quality and memory efficiency.

What speed will Vicuna 7B run at on RX 6700 XT 12GB?

On RX 6700 XT 12GB, Vicuna 7B achieves approximately 24.7 tokens per second decode speed with a time-to-first-token of 7847ms using Q4_K_M quantization.

Can RX 6700 XT 12GB run Vicuna 7B for coding?

For coding workloads, Vicuna 7B on RX 6700 XT 12GB receives a D grade with 24.7 tok/s and 4K context.

What context window can Vicuna 7B use on RX 6700 XT 12GB?

On RX 6700 XT 12GB, Vicuna 7B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.

What should I upgrade first if Vicuna 7B feels slow on RX 6700 XT 12GB?

Remove offload with more accelerator memory. Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.

See all results for RX 6700 XT 12GBSee all hardware for Vicuna 7B
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