Not the best choice for the A7SIII, I'm afraid. You see, Nvidia GPUs do not support hardware decoding for any H.264 10-bit 4:2:2 footage at all (only 8-bit 4:2:0 is supported for H.264 at all), while Adobe's implementation of NVDEC for HEVC only supports 4:2:0 footage (whether 8-bit or 10-bit). Plus, none of the F-series CPUs support QuickSync hardware decoding or encoding at all. Therefore, your CPU will get slammed while decoding that footage (because all decoding of that 4:2:2 video will be handled entirely by the CPU with absolutely no help whatsoever from the GPU), being pegged to 100% while even a weakling GPU will get relatively low usage.
In this case, I'd strongly recommend the i9-12900K, not the i9-12900KF, for this media as it has the integrated Intel UHD Graphics 770 that's absolutely required to enable hardware decoding for any 4:2:2 footage at all (and you will need to enable the IGP in order to do that; otherwise, if the IGP is disabled by default you would end up no better than your original choice of an i9-12900KF).
Some motherboards disable the IGP by default. To enable the IGP on the Asus motherboard, you will need to get into the BIOS setup, click "Advanced mode", then click the "Advanced" tab and then the "Graphics Configuration" line item, and then enable the "iGPU Multi-Monitor" (this item may have been set to "Disabled" by default).
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