Can I Run Yi 1.5 34B Chat on NVIDIA GeForce RTX 4070 Ti?
Autor: Jakub Rusinowski · Ostatnia aktualizacja: 29 września 2026
No. Yi 1.5 34B Chat needs 23.6 GB at 8K context (20.8 GB weights + 2.8 GB KV cache/overhead) at Q4_K_M and the NVIDIA GeForce RTX 4070 Ti has only 12 GB. No quantization we publish closes a gap that size.
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The numbers
| Model | Yi 1.5 34B Chat |
| Parameters | 34B |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 23.6 GB |
| NVIDIA GeForce RTX 4070 Ti VRAM | 12 GB |
| Verdict | Does not fit |
Yi 1.5 34B Chat on the NVIDIA GeForce RTX 4070 Ti: VRAM by quantization
| Quant | VRAM needed | Fits 12 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 71.6 GB | ✗ No | — | — |
| Q8_0 | 39.4 GB | ✗ No | — | — |
| Q6_K | 31 GB | ✗ No | — | — |
| Q5_K_M | 27.2 GB | ✗ No | — | — |
| Q4_K_M | 23.6 GB | ✗ No | — | — |
| Q3_K_M | 17.5 GB | ✗ No | — | — |
| Q2_K | 14.1 GB | ✗ No | — | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 12 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the NVIDIA GeForce RTX 4070 Ti: 8K 23.6 GB ✗ · 31K 29.4 GB ✗. Past 8K it no longer fits 12 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Either step down to a smaller size in this family, or move to a NVIDIA GeForce RTX 5090 Laptop GPU (24 GB), the card with the least memory we track that holds it.
No compatible GPU? Yi 1.5 34B Chat on 32 GB of system RAM, CPU only: runs comfortably.
Yi 1.5 34B Chat needs ~24 GB but this GPU has 12 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
Other Yi 1.5 Family sizes on the NVIDIA GeForce RTX 4070 Ti
- Yi 1.5 9B Chat — runs (6.9 GB)
Yi 1.5 34B Chat on nearby hardware
- Intel Arc B570 (10 GB) — does not fit
- NVIDIA GeForce RTX 4090 (24 GB) — runs
All Yi 1.5 Family sizes on the NVIDIA GeForce RTX 4070 Ti | Yi 1.5 34B Chat model page | NVIDIA GeForce RTX 4070 Ti GPU page | VRAM calculator | Check your hardware