Hi,
I’m having the exact same problem as John.
My clips are a mixture of 720p50 and 1080p25 All-i H264 MOVs from a Canon 1DX.
Running Resolve 9 Beta 2 on a DIY PC, Windows 7 SP1 64bit.
PC specs:
i5-2500k @ 3.30ghz
Nvidia GTX 560 1024MB GDDR5 (GFX Driver 304.79)
8 GB RAM