Game lags even though at high settings

hello i been having issues with beam ng drive after 5.1.0 or something before that were the game lags horribly even the before that my computer was able to handle it here are my specs

Gigabyte Radeon 5770 1GB
16 gb ram from pny
I5 4440 CPU AT 3.10 GHZ
1 Tb hard drive WD Blue
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every update it seems the lag gets worse and worse its really bad right now at 6.0.1

 

You barely meet the Moderate requirements.

You shouldn't expect it to run well at high settings. At medium-low you should be able to run it fine.

 

yeah but even at the lowest setting the game runs poorly and im not understanding why

 

Because your GPU is seven years old and is slower than a GTX 750 which is considered an entry level card now. Turn down the graphics, especially SSAO and Dynamic Reflections.

 

ah thats probly why ;w; dang i even spent some cash to by my radeon i feel like a idiot now

 

try these settings, it makes it look fairly high: custom graphics, lighting low, shader quality normal, texture quality, high, initializing off and dynamic reflection off, or low.
those are the big frame rate impacts... but you can do whatever you want, thats just a suggestion.