How much VRAM do I need for ERNIE-4.5-21B-A3B-Thinking-GGUF BF16?

Running ERNIE-4.5-21B-A3B-Thinking-GGUF BF16 locally requires 44.34 GB VRAM, which exceeds consumer GPUs. You'll need prosumer cards like the NVIDIA A6000 (48GB) or an A100 (80GB).

What happens if I don't have enough VRAM?

If your GPU VRAM is insufficient, llama.cpp and similar tools will offload model layers to system RAM (CPU inference). This is much slower — expect 10-50× the generation latency compared to full GPU inference.

Can I use multiple GPUs to run ERNIE-4.5-21B-A3B-Thinking-GGUF?

Yes! Tools like llama.cpp, vLLM, and Ollama support tensor parallelism across multiple GPUs. For example, 2× RTX 3090 (24GB each) gives you 48GB total VRAM, which can run many large models.

Is BF16 quality good enough for production?

FP16/BF16 is the standard precision used for production inference and serves as the quality baseline. All fine-tuned models are typically served at this precision.

VRAM Requirements for ERNIE-4.5-21B-A3B-Thinking-GGUF BF16

Recommended GPU Configurations

2× RTX 3090 (48GB total)

NVIDIA A6000 (48GB)

NVIDIA A100 40GB SXM

📊 VRAM Calculation Breakdown

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ERNIE-4.5-21B-A3B-Thinking-GGUF — Other Quantizations

Frequently Asked Questions

VRAM Requirements for
ERNIE-4.5-21B-A3B-Thinking-GGUF BF16