AMD/ATI Pixel Clock Patcher

[ssateneth]

Can you think of a reason why an nvidia card can drive my LCD panel to 120Hz 1080p and still have integrated panel sound speakers work on both HDMI and displayport, but AMD cards can only do at most 95hz with sound, or 100hz without sound (CVT reduced blanking) on both HDMI and displayport? Is this an issue with driver limitation or some other issue? The issue seems consistent between many makes of AMD cards (280X, 380X, RX480)

This is given identical hardware (PC, monitor, cables, OS, software, etc). Only difference is the video card and associated driver.