Low FPS with good PC

Hello all! I usually get only around 30 FPS on LOW on GridMap. Pausing physics only increases FPS by 10, disabling collisions doesn't really increase FPS.

Here are my specs:
CPU: AMD Phenom II Black X4 980 @ 3.70 GHz
GPU: Nvidia GeForce GTX 960 2 GB
RAM: 16 GB HyperX Beast
Windows 10
1 TB HDD

The weird thing is, I had upgraded my GPU and RAM this year, but before then the game ran fine. Any help?

 

your cpu is to blame. amd never really ran the game to well. i had a fx 8350 and the game took a nose dive whenever i decided to have the semi on screen. i upgraded to a intel i7 and now i can have like 5 semis on screen and still hold 70 fps

 

FPS gain when pausing indicates CPU bottleneck.

 

I get 15 fps with my low spec computer. i was surprised to see that many frames per second.
Here is my cpu
Amd 5350 Apu with built in radeon 8500
Im glad i just finished building my gaming rig. I get about 70 fps on high
15 fps is ok for me it does not bother me