Review on ASUS PG259QN DisplayPort Ergonomic Mountable 24.5" 360Hz - Pivoting, Swiveling, Blue Light Filter, ‎ASPG259QN by Dominic Webb

This is by far the best technology I've ever had. I couldn't even imagine the difference between 60Hz and 240Hz, however problems started appearing as soon as 360Hz was displayed, 360Hz is not available via HDMI but is due to the display port. I wanted to use this monitor at full power, use 360Hz. But when I connected it, zero reading, zero signal. Nothing at all. I've tried it on two computers with no success. I had to return the item as I was wondering if the display port could be defective. I worked with this product for about 15 hours, HDMI worked great but when it came to displayport nothing. And I bought the SPECIALLY for the 360Hz feature. I am returning this item and buying the same product again hoping the displayport will work this time. If anyone can PLEASE tell me what's going on. I would appreciate it from the world and back. Did I do something wrong? Was there anything I should have tried before returning? All in all, this is literally the best monitor I've ever had. And for those who might be skeptical, this is the real deal and is sure to blow your socks off. But maybe I've encountered an inferior batch, please someone tell me why the display port is not working for me. Thanks in advance.