Well, turns out that the monitor's lock allows for some overclocking. The problem was the NVidia driver. It silently ignores pixel clocks abore 165MHz. It still tells you that you're using more than that, but it's outright lying to you. I had to use ToastyX's NVIDIA Pixel Clock Patcher:http://www.monitortests.com/forum/Threa ... ck-Patcher
It worked. Now I can go up to 77Hz without issues. The monitor still complaints if I want to go above it though. 85Hz works, but an OSD pops up in the middle of the screen that tells me:
"This mode is not optimal. Recommended mode: 1920x1080@60Hz"
I can make that OSD disappear by pressing the menu button once, but after two minutes, it comes back with a vengeance. It switches the monitor back to a 60Hz mode and the only thing that is displayed is the above OSD message, this time floating around on the screen, juuust in case I didn't notice it the first time. Goddammit...
Trying to go above 85Hz induces that behavior immediately; the monitor goes to 60Hz and the OSD tells you about the "optimal" mode.
Using reduced timings doesn't help either. In fact, the monitor's lock doesn't seem to care about the pixel clock or the horizontal refresh rate. Pixel clock can be 180MHz or 220MHz, hrefresh can be 80kHz or 100kHz... it doesn't give a damn. All it cares about is 77Hz. If you dare go above that, it locks you out.
This is a bummer, since the monitor's panel seems to be a quite fast one (Samsung was selling it as a "2ms" monitor, and Prad.de measured a 7.7ms black-gray pixel reaction time.) It's such a shame that Samsung then crippled this monitor with a vertical refresh lock :-/ And it behaves quite nice at 85Hz too (before it shows you the middle finger a couple of minutes later, that is.) There's no corruption or color degradation or blurring or any other artifacts to be seen, and no frame skipping.
So, still looking for a way to bypass this stupid thing.
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