NVIDIA Pixel Clock Patcher

[ToastyX]

I haven't heard of newer cards being affected by this limit. Does it clock down at 404.00 MHz pixel clock but not 404.01 MHz? If the limit is not exactly 404 MHz, then it's an unrelated problem.

Make sure the vertical total is high enough. The video card might not clock down when idle if the vertical total is too low because it needs enough time between frames to avoid screen flicker when changing memory clocks. I don't know what the lower limit is for NVIDIA cards, but I think 1475-1500 is enough. AMD/ATI cards require the "LCD standard" vertical total to clock down, which would be 1525 at 120 Hz, but that raises the pixel clock to near 500 MHz.

The video card also won't clock down if you have two monitors connected.