Yi 1.5 6B needs ~6.3 GB VRAM. RX 5700 XT 8GB has 8.0 GB. With Q4_K_M quantization, expect ~69 tok/s.
Operating mode
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
Fit status
Runs well
Decode
69.2 tok/s
TTFT
2797 ms
Safe context
4K
Memory
6.3 GB / 8.0 GB
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.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | B | Runs well | 69.2 tok/s | 1526 ms | 4K |
| Coding | B | Runs well | 69.2 tok/s | 2797 ms | 4K |
| Agentic Coding | C | Tight fit | 69.2 tok/s | 4068 ms | 4K |
| Reasoning | B | Runs well | 69.2 tok/s | 3305 ms | 4K |
| RAG | C | Tight fit | 69.2 tok/s | 5085 ms | 4K |
How Yi 1.5 6B (6B params) fits at each quantization level on RX 5700 XT 8GB (8.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 2.3 GB | Low | C52 |
Q3_K_S | 3 | 2.9 GB | Low | C53 |
NVFP4 | 4 |
Copy-paste commands to run Yi 1.5 6B on your machine.
Run
lms load Yi-1.5-6B-Chat && lms server startYes, RX 5700 XT 8GB can run Yi 1.5 6B with a B grade (Runs well). Expected decode speed: 69.2 tok/s.
Yi 1.5 6B (6B parameters) requires approximately 6.3 GB of memory with Q4_K_M quantization.
The recommended quantization for Yi 1.5 6B is Q4_K_M, which balances quality and memory efficiency.
On RX 5700 XT 8GB, Yi 1.5 6B achieves approximately 69.2 tokens per second decode speed with a time-to-first-token of 2797ms using Q4_K_M quantization.
For coding workloads, Yi 1.5 6B on RX 5700 XT 8GB receives a B grade with 69.2 tok/s and 4K context.
On RX 5700 XT 8GB, Yi 1.5 6B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/yi-1.5-6b-on-rx-5700-xt-8gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview:
| Medium |
| C53 |
Q4_K_M | 4 | 3.7 GB | Medium | C53 |
Q5_K_M | 5 | 4.3 GB | High | C53 |
Q6_KBest for your GPU | 6 | 4.9 GB | High | C53 |
Q8_0 | 8 | 6.4 GB | Very High | F0 |
F16 | 16 | 12.3 GB | Maximum | F0 |