I have also a 10xx-series Nvidia GPU and when trying H.264/H.265, 10-bit, 4:2:2 with Premiere Pro v15, v22, v22 Beta, no activity from the GPU is noticable, but the CPU is 100% busy and footage is completely stuck in Preview. When using XAVC S-I 4K, 10-bit- 4:2:2 from my Sony A7SIII it works smoothly, maybe this is what Amirdavran5E8F is describing.
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