Getting SageAttention actually fast on RDNA4: a 9070 XT build guide with all the caveats

Familiar_Worry332 · reddit · 2026-10-02

A user has published a working build of SageAttention on AMD RDNA4 GPUs (RX 9070 XT) within ComfyUI, sharing the full build steps plus every caveat encountered along the way. For AMD users running local image/video generation, this is a practical path to real speedups and lower VRAM use.

Related event: Hand-written HIP kernel brings SageAttention to RX 9070 XT with nearly 2x speedup(2 posts)→

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