Question about backlightbleed?

It's locked to 60hz because 2560x1440@100hz exceeds the driver dual link dvi pixel clock limit and there are no predefined refresh rates between 60 and 100hz.
Dual link DVI is limited to 330 MHz, although it can usually go much higher after bypassing the limits.

If I recall, 2560x1440@100hz is around 408 MHz pixel clock.

You can try using the ToastyX Pixel clock patcher (still works with AMD crimson), and then define a 2560x1440@100hz custom detailed resolution. This is guaranteed to at least work.

120hz is not a given. The pixel clock may exceed normal TDMS limits over dual link DVI; TMDS is only rated up to 450 mhz. Even though the pixel clock patcher bypasses that limit in software, YMMV if the hardware can handle it. You are welcome to try a 120hz custom resolution of 2560x1440 also.

144hz over dual link dvi at 2560x1440 will NOT work. Period

You can create custom resolutions in ToastyX Custom resolution utility.
 
Thanks for the technical reply.....So DVI is fixed to 60hz. So if I get a mini displayport to displayport cable I'll be able to increase refresh rate then?
 
Yes because displayport can run up to 620+mhz pixel clock on that monitor.
What's limiting DVI is the pixel clock limits.
1920x1080 should go up to 144 hz.

Just make a custom resolution. Takes less than 2 minutes.
use the AMD or Nvidia pixel clock patcher then create a custom resolution in ToastyX CRU.

You should be able to run up to 450 MHz on DVI dual link with the pixel clock patcher.
 
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