Iiyama ProLite gb2488hsu is the name of my monitor. It’s for competitive gaming and I didn’t come across any review saying, that it couldn’t 1920x1080x144Hz. That would be really absurd, since 144Hz is really the point of this monitor. Although I must say, that I’m not familiar with any of this hsync stuff.
Well, I do play CS:GO competitively. 
(Yes, on Linux!)