Can I Run Granite 4.1 30B on NVIDIA L40S?
Written by Jakub Rusinowski · Last updated July 21, 2026
Yes. Granite 4.1 30B needs 33.5 GB at 8K context (30.9 GB weights + 2.6 GB KV cache/overhead) at FP8 (Q4 est. ~12-15GB, unconfirmed) and the NVIDIA L40S has 48 GB, leaving about 14.5 GB of headroom, at roughly 24 tok/s (estimated).
See what else this hardware can run →
The numbers
| Model | Granite 4.1 30B |
| Parameters | 30B |
| Quantization | FP8 (Q4 est. ~12-15GB, unconfirmed) |
| VRAM needed (8K context) | 33.5 GB |
| NVIDIA L40S VRAM | 48 GB |
| Verdict | Runs |
| Estimated speed | ~24 tok/s |
Granite 4.1 30B on the NVIDIA L40S: VRAM by quantization
| Quant | VRAM needed | Fits 48 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 62.6 GB | ✗ No | — | — |
| Q8_0 | 34.5 GB | ✓ Yes | 64K | Build for this |
| Q6_K | 27.2 GB | ✓ Yes | 64K | — |
| Q5_K_M | 23.8 GB | ✓ Yes | 64K | Build for this |
| Q4_K_M | 20.7 GB | ✓ Yes | 128K | Build for this |
| Q3_K_M | 15.4 GB | ✓ Yes | 128K | — |
| Q2_K | 12.4 GB | ✓ Yes | 128K | — |
Assumes an 8K-token context with an f16 KV cache, on an estimated architecture — this model publishes no config we can read. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 48 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 FP8 (Q4 est. ~12-15GB, unconfirmed) on the NVIDIA L40S: 8K 33.5 GB · 32K 38.9 GB · 128K 60.2 GB ✗. Past 128K it no longer fits 48 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Nothing to change — run it at FP8 (Q4 est. ~12-15GB, unconfirmed). If you want more capability, check whether the next size up also fits.
No compatible GPU? Granite 4.1 30B on 32 GB of system RAM, CPU only: runs comfortably.
Running Granite 4.1 30B on this card:
At 2 hrs/day, buying (~$7,499) beats renting at $0.55/hr after about 18.9 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.
Other IBM Granite 4.1 sizes on the NVIDIA L40S
- Granite 4.1 8B — runs (6.8 GB)
- Granite 4.1 3B — runs (3.5 GB)
Granite 4.1 30B on nearby hardware
- Intel Arc B580 (12 GB) — does not fit
- Apple M1 Max (64 GB) — runs
All IBM Granite 4.1 sizes on the NVIDIA L40S | Granite 4.1 30B model page | NVIDIA L40S GPU page | VRAM calculator | Check your hardware