Raises estimated decode speed by about 87%.
Adds memory headroom for longer context windows and future model growth.
~$219 MSRP
Yi 1.5 6B needs ~6.3 GB VRAM. RX 580 8GB has 8.0 GB. With Q4_K_M quantization, expect ~30 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
32.7 tok/s
TTFT
5919 ms
Safe context
4K
Memory
6.3 GB / 8.0 GB
This setup is broadly balanced for this model.
Older PCIe generation
PCIe 3.0 is workable, but it compounds the penalty when you offload heavily or try to scale across multiple cards.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | C | Runs well | 30.1 tok/s | 3511 ms | 4K |
| Coding | C | Runs well | 30.1 tok/s | 6437 ms | 4K |
| Agentic Coding | C | Tight fit | 30.1 tok/s | 9363 ms | 4K |
| Reasoning | C | Runs well | 32.7 tok/s | 6995 ms | 4K |
| RAG | C | Tight fit | 32.7 tok/s | 10762 ms | 4K |
How Yi 1.5 6B (6B params) fits at each quantization level on RX 580 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 | 3.4 GB | 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 |
Copy-paste commands to run Yi 1.5 6B on your machine.
Run
lms load Yi-1.5-6B-Chat && lms server start升级选项
Raises estimated decode speed by about 87%.
Adds memory headroom for longer context windows and future model growth.
~$219 MSRP
Raises estimated decode speed by about 249%.
Adds memory headroom for longer context windows and future model growth.
~$549 MSRP
Yes, RX 580 8GB can run Yi 1.5 6B with a C grade (Runs well). Expected decode speed: 30.1 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 580 8GB, Yi 1.5 6B achieves approximately 30.1 tokens per second decode speed with a time-to-first-token of 6437ms using Q4_K_M quantization.
For coding workloads, Yi 1.5 6B on RX 580 8GB receives a C grade with 30.1 tok/s and 4K context.
On RX 580 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-580-8gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview: