FPS Issues?

In some comparisons between my computer and my siblings computer I've noticed a difference in FPS.

The rig I'm running with has:
i7-4790k (stock speeds)
GTX 770 2gb
Asus Z97-A
16gb 1866 Mhz RAM

When I play BeamNG on my machine at 1600x900 (native), vsync off, AA 1x, and everything else maxed out I get in the neighborhood of 50-70 FPS on DryRock Island in a Gavril D-series. On occasion while driving it'll dip down to 45-ish.

On my sibling's computer:
i5-4670K (stock speeds)
GTX 770 2gb
MSI Z87-G45
16gb 1866 Mhz RAM

On the same graphics settings, the machine running the i5 is very noticeably better. 80+ FPS with near constant 60fps in areas with dense foliage and shadows.

I understand that the game is still in alpha, but is there any logical reason why there would be such a dramatic difference in FPS?

 

That does sound weird...your machine should be the one getting better performance but for some reason it is not getting better performance its getting worse performance...

 

We've checked to see if it's the GPUs as well. We swapped the 770's and still got the same results.

 

Check you are using the same settings on both computers, same resolution, same postprocessing, etc. I tried with your settings with the computer in my sig, and I only dip to 50 or so around the area where there are tons of houses and foliage, but the rest of the map is smooth 70+ fps.

(PostProcessing is in a different menu)

 

I'll double check to make sure the settings are the same. I'll post my findings once I've got the results.

 

Alright. I've made sure that the graphics settings between the two systems are the same.

1600x900
Full Screen
Refresh Rate: 60 Hz
Mesh: High
Texture: High
Lighting: High
Anisotropic Filtering: 16x
AA: 1x
Shaders: High

And the PostFX Settings and Sliders are the same.

The test is on Dry Rock Island with the Gavril D-series (Stock).

Exterior:
i7: 60-70 FPS
i5: 80-82 FPS

Interior:
i7: 76-77 FPS
i5: 82 FPS

Driving around the island (Interior):
i7: Min: 32 Average: 47 Max: 65
i5: Min: 42 Average: 70 Max: 104

 

Does the ASUS MoBo have a PLX chip on it? It's a controversial inclusion by ASUS on some motherboards to increase PCI-e bandwidth but also increases latency. I'd try switching the processors and RAM as well. Estama said somewhere fast RAM benefits the physics core immensely, and just because the bus speed is the same doesn't mean the timings are, necessarily.

 

After some digging around on google it looks like Asus only uses the PLX chips in their Z97-Deluxe and Z97-WS. I'd say no to the Z-97-A having one.