This is something with which I have a problem. High frame rates as a solution to tearing.
Unless the frame is updated by the GPU exactly in time with the refresh update time of the monitor, there will exist tearing. In other words, you have to enable V-sync to eliminate tearing, even with high refresh rate monitors.
Having the GPU provide frames faster than the monitor's refresh rate is not a solution, as there will be a mismatch in timings and thus tearing will still occur.
Do you have V-sync enabled at 144 Hz?
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With the work I do I have a couple (few actually) of gaming systems - one of them I use Gsync with Asus 165Hz monitor...
On another I have AMD system (CPU and GPU) using same monitor, no V-sync.
Then have pair of Intel CPU's matched systems other than one has 1 (sometimes 2) Titan X, other 1 (sometimes 2) Fury X - certain games will use V-sync sometimes.
You're exactly right - though (just my humble opinion) we need some cards with a good amount more raw power at the end of the day to match the refresh rates (hence it sets me back to see AMD take support higher refresh rates, yet releasing new generation cards with little to no more raw power benefits).
Both SLi and CF at res 2560 x 1440 I find are much smoother than V-Sync, even G-sync (as long as game supports dual cards well) - however when get into FPS games it does add a bit to latency (my old aim needs any and all the help it can get these days
Just my wee opinion, and reading into things a bit - It seems to me that AMD is pushing the idea of systems with many video cards in the next next generation vs. even trying to keep up with the raw power Nvidia brings to the table (good for sales units as well) - Same idea in how they approached the CPU market years back thinking 8 (more) cores is going to win the game with little need for raw power.
If the future is what some feel it is, then AMD's ideas of many cores and many GPU's vs. Raw Power may go well for them - If not, look at the spread that starting to happen in CPU arena, we could see the same thing now in the GPU arena (if AMD is betting the farm incorrectly) - mix in there even with DX12 and its features, AMD has had its share of problems with keeping frames smooth and in-sync.
Again, just my humble opinion(s) and take on things though I'm hoping AMD hits the mark all the way as all the hype and then some as that would only be better for all of us.