Written by Jakub Rusinowski · Last updated August 15, 2026
Yes. Yi 1.5 9B Chat needs 5.3 GB at Q4_K_M and the NVIDIA GeForce RTX 4090 has 24 GB, leaving about 18.7 GB of headroom, at roughly 119 tok/s (estimated) with room for up to 128K of context.
| Model | Yi 1.5 9B Chat |
| Parameters | 9B |
| Quantization | Q4_K_M |
| VRAM needed | 5.3 GB |
| NVIDIA GeForce RTX 4090 VRAM | 24 GB |
| Verdict | Runs |
| Max context | 128K |
| Estimated speed | ~119 tok/s |
Nothing to change — run it at Q4_K_M. If you want more capability, check whether the next size up also fits.
Running Yi 1.5 9B Chat on this card:
At 2 hrs/day, buying (~$1,599) beats renting at $0.34/hr after about 6.5 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
All Yi 1.5 Family sizes on the NVIDIA GeForce RTX 4090 | VRAM calculator for Yi 1.5 9B Chat | NVIDIA GeForce RTX 4090 GPU page | Check your hardware