Jais 13B Chat — Hardware Requirements & GPU Compatibility
Chat
Jais 13B Chat is a 13B-parameter open language model from inceptionai. At BF16 it needs about 28.60 GB of VRAM — see which GPUs and Macs can run it below.
20.9K downloads
168 likesSpecifications
- Publisher
- inceptionai
- Parameters
- 13B
- Release Date
- 2024-09-11
- License
- Apache 2.0
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HuggingFace
How Much VRAM Does Jais 13B Chat Need?
Select a quantization to see compatible GPUs below.
| Quantization | Bits | VRAM | + Context | File Size | Quality |
|---|---|---|---|---|---|
| BF16 | 16.00 | 28.6 GB | — | 26.00 GB | Brain floating point 16 — preferred for training |
Which GPUs Can Run Jais 13B Chat?
BF16 · 28.6 GBJais 13B Chat (BF16) requires 28.6 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 38+ GB is recommended. 1 GPU can run it, including NVIDIA GeForce RTX 5090.
All compatible consumer-level GPUs are running near their VRAM limit. You may also want to consider professional GPUs (e.g., NVIDIA A100, H100) which offer significantly more VRAM. For more headroom and better throughput, consider a multi-GPU configuration with tensor parallelism (supported by tools like vLLM, llama.cpp, or text-generation-inference).
Decent
— Enough VRAM, may be tightWhich Devices Can Run Jais 13B Chat?
BF16 · 28.6 GB15 devices with unified memory can run Jais 13B Chat, including NVIDIA DGX H100, NVIDIA DGX A100 640GB, Mac Studio M4 Max (36 GB).
Runs great
— Plenty of headroomDecent
— Enough memory, may be tightRelated Models
Frequently Asked Questions
- How much VRAM does Jais 13B Chat need?
Jais 13B Chat requires 28.6 GB of VRAM at BF16.
VRAM = Weights + KV Cache + Overhead
Weights = 13B × 16 bits ÷ 8 = 26 GB
KV Cache + Overhead ≈ 2.6 GB (at 2K context + ~0.3 GB framework)
VRAM usage by quantization
BF1628.6 GB- Can I run Jais 13B Chat on a Mac?
Jais 13B Chat requires at least 28.6 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 Jais 13B Chat locally?
Yes — Jais 13B Chat can run locally on consumer hardware. At BF16 quantization it needs 28.6 GB of VRAM. Popular tools include Ollama, LM Studio, and llama.cpp.
- How fast is Jais 13B Chat?
At BF16, Jais 13B Chat can reach ~102 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 ÷ 28.6 × 0.55 = ~102 tok/s
Estimated speed at BF16 (28.6 GB)
~102 tok/s~76 tok/s~63 tok/sReal-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.
- What's the download size of Jais 13B Chat?
At BF16, the download is about 26.00 GB.
- Which GPUs can run Jais 13B Chat?
1 consumer GPU can run Jais 13B Chat at BF16 (28.6 GB). Top options include NVIDIA GeForce RTX 5090.
- Which devices can run Jais 13B Chat?
15 devices with unified memory can run Jais 13B Chat at BF16 (28.6 GB), including Mac Mini M4 (32 GB), Mac Mini M4 Pro (48 GB), Mac Pro M2 Ultra (192 GB), Mac Studio M2 Ultra (192 GB). Apple Silicon Macs use unified memory shared between CPU and GPU, making them well-suited for local LLM inference.