CUDA Compute Capability change for RTX 5000 series#17129
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Sep 17, 2025
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The CUDA Compute Capability threshold that enables xformers in sd_hijack_optimizations.py is set to 9,
which only covers up to the RTX 4000 series (Ada Lovelace: 8.9).
On RTX 5000 series cards (Blackwell: Compute Capability 10.0~12.0), xformers may show as enabled but it isn’t actually applied and doesn’t appear in the Cross-Attention optimizations list.