4K editing (GoPro footage) stutters that transfer into rendered file. What can be the problem?

Hello everyone,

Like the title says: When editing 4K footage from a GoPro (4K 60 FPS) in Premiere Pro, the footage stutters. Even when viewed in 1/8 mode.. If you try to render a small portion of the footage, the stutters transfer into the rendered file.

This only happens with the GoPro Hero 7 black footage (4K 60 FPS) and not when editing drone footage from a DJI drone that is 4K 25 FPS or any full HD footage. (Yes, it does stutter sometimes but lowering to 1/4 usually solves that and it is never transferd into the rendered file.)

Some specs:

i5 7400 @3GHZ.

8 GB RAM

HDD 1tb  7200 RPM, 64 mb cache

NVIDIA GTX 1050 4 GB

Adobe CC 2019 V13.0 - Mercury Playback GPU Acceleration enabled

The files that we are trying to edit are .MP4 files if I'm not mistaken.

I think it's the RAM that's not keeping up.. What do you guys think the problem may be?

With kind regards,

Fabian