Triple buffering surely help, I always have that on when I was using the ACD. And actually I need that ON, otherwise, I can see the tearing. However, what surprise me is that with a gaming monitor. Now I can turn it OFF and I actually never see any tearing.
Yes,
1080Ti works fine in my 2009 Mac Pro. Some guys even install multiple TitanX, but that’s mainly for CUDA computation. For gaming, a single 1080Ti make more sense.
You can always lock the output to 60Hz and check if you can notice the difference now. What I found is that I can only notice the difference in mouse cursor smoothness. All other UI animation, web page scrolling, etc looks the same to me.
Yes, the frame rate will be locked with any kind of V-sync. IMO, this is good, rendering more frame than your monitor can display is just waste of power, generate more heat, but no benefit. Especially 120FPS is good enough already.
If there is a G-sync version of my monitor, I will get it. However, there is only one option for 49" 32:9 monitor. So, no alternative G-sync choice. But what I found interesting is that, when I use the 27" ACD, I can really see the tearing if I turn off V-sync. But with this 144Hz gaming monitor, I never see any tearing even I turn V-sync Off (even though the GPU deliver more than 200FPS). Before I switch to this new monitor, I always turn on V-sync because I hate tearing. In fact, I worried about without G-sync may affect my gaming experience. But luckily I don't actually need it with my current setup.
I think 60Hz vs 120Hz is very personal. IMO, 60Hz monitor is not a huge problem for gaming, as long as the GPU can stably deliver right at 60FPS and never drop below (I am just a causal gamer). Do I want to go back? Not at this moment. What I really want? An OLED monitor with 7680x2160 @ 75Hz (or above). This should be good for both gaming and working, but obviously it won't happen at any foreseeable future. I really love this super ultra wide experience, it makes gaming like watching movies (I love RPG games), super enjoyable

And I really don't want to go back to anything 27" 16:9, no matter is 5K or 8K
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