# Reply To: OSSC + Pentium 233 MMX (VGA)

#25638
beorn
Participant

I guess where my confusion comes in is when connecting my PC to my monitor without using the OSSC (the same monitor mentioned here when using the OSSC), I don’t get near the same image fidelity or proper aspect ratio (top and bottom borders). So I thought the OSSC is doing some form of image manipulation, and was then curious how to manipulate that further with 800 or 1024.

Is there a guide as to exactly what each of these settings do? Wondering if I can “tweak” these further to attempt higher res:

H. Samplerate :
H. Synclength :
H. Backporch :
H. Active :
V. Synclength :
V. Backporch :
V. Active :

Thanks.