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Thread Starter 
I have an acer xb270hu and would like to tweak some the timings to allow 144hz 1440p and also downclock GPU. Right now only 120hz mode will let gpu downclock. 144hz causes higher clocks in idle.

But whenever I try to create a custom resolution, even if the refresh rate is within normal parameters (even 75hz and 60hz), the monitor goes black and says no signal. I think I need to hardcode the front porch, back porch, and sync width to a number the monitor expects and go from there, but I don't even know where to start. None of the standard timing calculations work (GTF, DMT, CTV, CTV reduced blanking. auto)