Well it's kind of a nice problem to have in a sense: the software is
too good for most hardware.
With the advanced AI features ie: speedwarp, depthmap, magic mask etc I find a multi-export process the only way to make it all work - especially in 4k.
Depends on the GPU, but I suspect even a 4090 could be brought to it's knees if you throw everything at it.
For my 2070super and needing 4k 'fancy AI' stuff - I export each clip several times as h.265 @ 40,000 or 80,000 mbps - is more than good enough. (DNxHR if critical - Looking forward to AV1 when I get my 40x0 soon....)
1. Color grade with noise reduction (TNR better 5 frames and SNR) - export (get like 5-6 fps export)
2. import clip - add Speed Warp 70% slowed - export (get like 2 fps export)
3. Depth map? one more round...
Combining Speed Warp or Depth Map with just even noise reduction is almost a sure recipe for crash.
DaVinci Resolve Studio 18.6.6 | Nvidia Studio 537.42 | Mavic 2P | GH6 | Ronin SC
i9 13900K | 64GB 5600MHz DDR5 RAM | RTX4080 16GB | (4) 990Pro 2tb m.2 | Windows 11