Weird FPS Issues when driving big cars on fullspeed

Greetings,

I'm having some weird FPS issues when driving with big cars or with fast cars on full-speed.
I made a video to demonstrate the issue:
I enabled and disabled slow motion at some points to make the FPS difference clear.



My rig:
OS: Windows 8.1 Pro 64-bit
CPU: AMD FX-8320E, 8-Core @ 3,2GHz
RAM: 16,0GB DDR3 DC @ 798MHz
MB: ASRock 970 Extreme3 R2.0
GPU: Sapphire R9 280 @ 3072MB
and a 250GB SSD.

Installed the newest drivers, chipset drivers, AMD Drivers, Catalyst 15.5 beta drivers, Motherboard drivers. Everything done, nothing works.
Nothing is bottlenecking, CPU ran @ 40% usage, GPU @ ~50% usage.

Any help would be appreciated.

 

Larger vehicles are harder to process due to a more complex physics skeleton. It will cause a framerate drop to use them.

 

But I don't think you are supposed to play @ 18 FPS when driving a big vehicle with no wall collisions / high speed at all. I get < 20 FPS when I just stand there.

CPU is currently running @ 21°C. While gaming, max. 35°C. Throttling is unlikely because I ran various tests on my CPU and everything seems normal.
I can't even spawn another vehicle


/Edit: Ops, posted in the wrong category. Can you move this to Support?

 

Are your specs right? 16 gigs of DDR memory? 798 MHz?

 

Yes, right. (DDR3 not DDR) As said, running in Dual Channel, so 1600MHz.

 

Well, I'd wait for better optimalization, since the engine this game runs on is not optimized very good. Maybe there is another solution but this is the only one I know :/

 

Slowing down the simulation makes your FPS go up?

Well then, your CPU cannot handle the physics. I'm pretty sure the 8320 E is the power-saving version of the 8320, so the frequency and voltage is a lot lower. I'd recommend over clocking, the FX series over clocks very well.

AMD chips have inferior singlethreaded performance, so running large complex vehicles will tank your FPS since the CPU cannot process it at full speed. Slowing down the simulation significantly reduces the rate at which the calculations must be done, therefore the game runs better.

 

Can't this be also caused by the lack of Dx 11?

 

Not when it's the CPU at fault not the GPU.

 

So I OC my CPU to 3,9GHz and the performance seems to be increasing. But collisions are still awful...

 

2 Cores were parked, I unparked them but sadly, the performance didn't increased.

 

your cpu cant be behaving correctly my core 2 quad can beat your amd FX-8320E with that vehicle, it definetly shouldnt be like that.

 

Yes michael, that's what I'm trying to say but it seems about right. Not sure if poorly optimized or just bad hardware.

 

I am honestly not seeing anything unusual here. Its a big vehicle that is running at lower fps until slow motion is enabled (which boosts FPS on CPU limited rigs anyway).
Its very clearly being limited by the CPU. 3.2ghz AMD, far from high end, particularly with AMDs low single thread performance (important to BeamNG). The load figures posted above are very normal too considering the game processes 1 vehicle on 1 core.

Go into the windows power plan setting and check it hasnt inadvertantly been set to low power or balanced. If it has, set it to high performance.