Granite 4.1 30B — Hardware Requirements & GPU Compatibility
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Granite 4.1 30B is a 28.9B-parameter open language model from IBM. It supports a context window of up to 131,072 tokens. At BF16 it needs about 58.57 GB of VRAM — see which GPUs and Macs can run it below.
27.5K downloads
129 likesSpecifications
- Publisher
- IBM
- Parameters
- 28.9B
- Architecture
- GraniteForCausalLM
- Context Length
- 131,072 tokens
- Vocabulary Size
- 100,352
- Release Date
- 2026-05-04
- License
- Apache 2.0
Get Started
HuggingFace
How Much VRAM Does Granite 4.1 30B Need?
Select a quantization to see compatible GPUs below.
| Quantization | Bits | VRAM | + Context | File Size | Quality |
|---|---|---|---|---|---|
| BF16 | 16.00 | 58.6 GB | 92.4 GB | 57.73 GB | Brain floating point 16 — preferred for training |
Which GPUs Can Run Granite 4.1 30B?
BF16 · 58.6 GBGranite 4.1 30B (BF16) requires 58.6 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 77+ GB is recommended. Using the full 131K context window can add up to 33.8 GB, bringing total usage to 92.4 GB. No single GPU has enough memory — multi-GPU or cluster setups are needed.
Which Devices Can Run Granite 4.1 30B?
BF16 · 58.6 GB8 devices with unified memory can run Granite 4.1 30B, including NVIDIA DGX H100, NVIDIA DGX A100 640GB, Mac Studio M4 Max (64 GB).
Runs great
— Plenty of headroom
Decent
— Enough memory, may be tightRelated Models
Frequently Asked Questions
- How much VRAM does Granite 4.1 30B need?
Granite 4.1 30B requires 58.6 GB of VRAM at BF16. Full 131K context adds up to 33.8 GB (92.4 GB total).
VRAM = Weights + KV Cache + Overhead
Weights = 28.9B × 16 bits ÷ 8 = 57.7 GB
KV Cache + Overhead ≈ 0.9 GB (at 2K context + ~0.3 GB framework)
KV Cache + Overhead ≈ 34.7 GB (at full 131K context)
VRAM usage by quantization
BF1658.6 GBBF16 + full context92.4 GB- Can NVIDIA GeForce RTX 5090 run Granite 4.1 30B?
No — Granite 4.1 30B requires at least 58.6 GB at BF16, which exceeds the NVIDIA GeForce RTX 5090's 32 GB of VRAM.
- Can I run Granite 4.1 30B on a Mac?
Granite 4.1 30B requires at least 58.6 GB at BF16, which exceeds the unified memory of most consumer Macs. You would need a Mac Studio or Mac Pro with a high-memory configuration.
- Can I run Granite 4.1 30B locally?
Yes — Granite 4.1 30B can run locally on consumer hardware. At BF16 quantization it needs 58.6 GB of VRAM. Popular tools include Ollama, LM Studio, and llama.cpp.
- How fast is Granite 4.1 30B?
At BF16, Granite 4.1 30B can reach ~50 tok/s on AMD Instinct MI300X. Speed depends mainly on GPU memory bandwidth. Real-world results typically within ±20%.
tok/s = (bandwidth GB/s ÷ model GB) × efficiency
Example: AMD Instinct MI300X → 5300 ÷ 58.6 × 0.55 = ~50 tok/s
Estimated speed at BF16 (58.6 GB)
~50 tok/s~37 tok/s~31 tok/sReal-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
- What's the download size of Granite 4.1 30B?
At BF16, the download is about 57.73 GB.
- Which GPUs can run Granite 4.1 30B?
No single consumer GPU has enough VRAM to run Granite 4.1 30B at BF16 (58.6 GB). Multi-GPU or professional hardware is required.
- Which devices can run Granite 4.1 30B?
8 devices with unified memory can run Granite 4.1 30B at BF16 (58.6 GB), including Mac Pro M2 Ultra (192 GB), Mac Studio M2 Ultra (192 GB), Mac Studio M4 Max (128 GB), Mac Studio M4 Max (64 GB). Apple Silicon Macs use unified memory shared between CPU and GPU, making them well-suited for local LLM inference.