cu124 means CUDA 12.4

cu124 means CUDA 12.4 | Generated by AI

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Question: Does cu124 mean CUDA version 12.4?

Answer:

Yes. cu124 = CUDA 12.4. It’s the PyTorch wheel build tag — cuXYZ encodes CUDA XY.Z:

cu118 → CUDA 11.8
cu121 → CUDA 12.1
cu124 → CUDA 12.4
cu126 → CUDA 12.6
cpu → CPU-only build

You see it in install commands and wheel filenames:

pip install torch --index-url https://download.pytorch.org/whl/cu124
# wheel: torch-2.5.0+cu124-cp311-cp311-linux_x86_64.whl

The bundled CUDA runtime is statically shipped inside the wheel, so it doesn’t need to exactly match your system CUDA toolkit — what matters is your NVIDIA driver being new enough. Check with:

nvidia-smi   # top-right "CUDA Version" = max CUDA the driver supports

A driver supporting 12.6 happily runs a cu124 wheel (minor versions are forward-compatible within CUDA 12.x). For your RTX 4070, any recent driver covers all cu12x builds.

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