For I2V You can get a reasonable “draft” out of it in 1-2 minutes with nvidia >= 4070 & sufficient VRAM at 440x440 resolutions. T2V… not as much, still need to be doing something close to trained resolutions, but I still see some quality, more sporadic, at other known-good Wan resolutions.
Also this model seems to benefit noticeably from having both Cuda >= 12.8 and Torch >= 2.8, and separately SageAttention over Flash 2. But I have yet to see any cache threshold with Easy or Tea that doesn’t get a bit postmodern.