Cycles GPU Problem

[Jaspar_h]

Hi everyone. I startet Blender 3 months ago and I still have the same issues.
When I render an image Blender only uses my cpu. I habe set the preferences to cuda and have checked my cpu and gpu in the settings. I render with cycles and use gpu compute. I have tried with different tile sizes like 512 and 1024 but nothing chaged. My cpu is at 100% and my GPU at 6%. I have a Ryzen 52600, a GTX 1070 and 16gb 3200mhz Ram. I hope somebody can help me

[YAFU (English is not my native language)]

Hi.

@Jaspar_h

My cpu is at 100% and my GPU at 6%

But what are your render times comparing GPU only and CPU only?
You see if this may be related to your problem (enter to the link and read the entire thread):

Why does Task manager show low GPU usage in Cycles render?

Hi, Yesterday I received my new pc, I7, Nvidia 2070, 16 Gb, my ‘old’ laptop (I7, Nvidia 780m, 16Gb) had to make room for some more power. I’m surprised when I render my scene on both as it comes to the use of the graphics card. There’s a big difference in both, an as a surprise my good old laptop kicked it of. During rendering I made the following screen captures. First one the laptop wich is using the GPU around 50% but my new pc just using 2~5%. Most of the time it goes to FireFox. Can some…