I believe I have some graphics issues. I know the 8300 I have has Intel HD Graphics 4000, but for some reason it shows up as HD Graphics 2500 in "About this Mac" after the first boot while installing kexts and running MultiBeast. After going through the entire installation process successfully (although laggy at first) my 8300 hangs after I reboot it and doesn't ever fully boot back into MacOS. The progress bar fills and then goes back to ~60% and the screen has artifacts in it with a mouse pointer that moves when I move the mouse, and then goes back to normal, and then back to artifacts. Picture attached for reference.
Any assistance is appreciated!
Edit: I am connected to the monitor via DisplayPort-to-HDMI adapter.