RX 9070 XT 16GBコスパ重視
16 GB VRAM (+4)640 GB/s (+256)
B
Raises estimated decode speed by about 105%.81.1 tok/sデコード
Raises estimated decode speed by about 105%.
Adds memory headroom for longer context windows and future model growth.
〜$549 MSRP
Can Yi 1.5 9B run on RX 6700 XT 12GB?
YES — Runs Great
B59Good
Estimated from fit model
Yi 1.5 9B needs ~9.1 GB VRAM. RX 6700 XT 12GB has 12.0 GB. With Q4_K_M quantization, expect ~40 tok/s.
Runtime: llama.cppCapacity: RoomyBandwidth: LowStack: 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.
Select quantization to explore
Q4_K_M (Medium quality) — 9.1 GB, 39.6 tok/s, Runs well
9.1 GB required12.0 GB available
76% VRAM used
Fit status
Runs well
Decode
39.6 tok/s
TTFT
4895 ms
Safe context
4K
Memory
9.1 GB / 12.0 GB
Memory breakdown
Weights5.5 GB
KV Cache1.5 GB
Runtime0.9 GB
Headroom1.2 GB
See how fast it feels
See how fast it feelsYi 1.5 9B 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: 39.6 tok/s decode · 4.9s TTFT (warm) · 99 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 | B | Runs well | 39.6 tok/s | 2670 ms | 4K |
| Coding | B | Runs well | 39.6 tok/s | 4895 ms | 4K |
| Agentic Coding | B | Tight fit | 39.6 tok/s | 7119 ms | 4K |
| Reasoning | B | Runs well | 39.6 tok/s | 5784 ms | 4K |
| RAG | B | Tight fit | 39.6 tok/s | 8899 ms | 4K |
Quantization options
How Yi 1.5 9B (9B params) fits at each quantization level on RX 6700 XT 12GB (12.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 3.5 GB | Low | C54 |
Q3_K_S | 3 | 4.4 GB | Low | B56 |
NVFP4 | 4 | 5.0 GB | Medium | B56 |
Q4_K_M | 4 | 5.5 GB | Medium | B57 |
Q5_K_M | 5 | 6.5 GB | High | B57 |
Q6_KBest for your GPU | 6 | 7.4 GB | High | B56 |
Q8_0 | 8 | 9.6 GB | Very High | F0 |
F16 | 16 | 18.5 GB | Maximum | F0 |
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アップグレードオプション
Yi 1.5 9Bを快適に動かすハードウェア
Frequently asked questions
Can RX 6700 XT 12GB run Yi 1.5 9B?
Yes, RX 6700 XT 12GB can run Yi 1.5 9B with a B grade (Runs well). Expected decode speed: 39.6 tok/s.
How much VRAM does Yi 1.5 9B need?
Yi 1.5 9B (9B parameters) requires approximately 9.1 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 RX 6700 XT 12GB?
On RX 6700 XT 12GB, Yi 1.5 9B achieves approximately 39.6 tokens per second decode speed with a time-to-first-token of 4895ms using Q4_K_M quantization.
Can RX 6700 XT 12GB run Yi 1.5 9B for coding?
For coding workloads, Yi 1.5 9B on RX 6700 XT 12GB receives a B grade with 39.6 tok/s and 4K context.
What context window can Yi 1.5 9B use on RX 6700 XT 12GB?
On RX 6700 XT 12GB, 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.
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<iframe src="https://willitrunai.com/embed/yi-1.5-9b-on-rx-6700-xt-12gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
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