Lags in Davinci Resolve 15 - System weak, bad codec, etc?

Hey guys,

I already worked with Davinci Resolve and it went well. But now I have problems, because Davinci is lagging.

What I already dig to solve the problem:

I did all configurations recommended in the Davinci 15 Configuration Guide
I moved Davinci and my Files to my SSD
I installed the new Nvidia driver


My System:

Processor: Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz (8 CPUs), ~3.6GHz
Memory: 16384MB RAM
GPU: NVIDIA GeForce GTX 970

I trying to edit footage in 1920x1080 and 30 FPS. It was recorded with my Huawai Honour X6 and afterwards converted with "Handbrake" to .m4v (H.265) and constant FPS. I did this, because my smartphone records with a variable FPS, which Davinci could not handle.
I could try to create Proxy Files, but I think my setup should be able to perform Full-HD-Editing, shouldn't it?
Should I change the Codec? Is my Computer to weak for Full-HD-Editing?

No opinions?

Use either dnx or prores as intermediate, not h265

I agree with Walter.. H265 is not a good choice. I also notice that you've only got 16GB of RAM and I think Resolve 15 likes a little more than that, although V14 runs fine with just 16GB.

Hey,
Thank you for your answers.
I tried to optimize the media in davinci, which worked fine. Even with 16 GB.
I couldn't find the system requirements for Davinci. Are there any?
I used to render my material witch Handbrake, but handbraked cannot render to Dnx.
Can you recommend a programm for rendering my material in Dnx before using in Davinchi?

Hey,
Thank you for your answers.
I tried to optimize the media in davinci, which worked fine. Even with 16 GB.
I couldn't find the system requirements for Davinci. Are there any?
I used to render my material witch Handbrake, but handbraked cannot render to Dnx.
Can you recommend a programm for rendering my material in Dnx before using in Davinchi?

Prores is fine too.

Can you recommend a program to render my clips?

Can you recommend a program to render my clips?

You can use resolve itself to transcode media.

I couldn't find the system requirements for Davinci. Are there any?

They have a configuration guide on the site.
16GB RAM is fine for 15 as long as you are not using Fusion, but the GPU is very important.

Hey thanks.
You think the GPU is to weak for Full-HD Editing? I'm not planing to edit 4k stuff..