@ComteDracula Looks like a good system.
Needs 8GB more memory, If you can't match what you already have
then maybe a Matched set of 16GB to replace the 8 already there.
Also a Setting on your Graphics driver, turn off G-Sync
your Monitor is Limiting the speed of your card to 68 FPS.
NVIDIA G-SYNC can cap benchmark fps/score to the monitor's refresh rate. (Disable G-SYNC/VSYNC or any other frame capping technologies during the benchmark)
https://www.userbenchmark.com/Faq/What-is-the-UBM-PC-status/94#GRAPHICS_CARD
Your's is comparable ( better ) to my Mid-Range gaming system
and I don't see stuttering on the scenes there.
CPU alone, you are 15% faster
but GPU, probably because of G-SYNC
you are a bit slower.