RE: Inspiron 15 Gaming 7567 HDMI Specs/Does HDMI out support full bandwidth for G-SYNC Dell Gaming Monitor – S2417DG
Just something to consider here: Displays that support HDR are going to start hitting in earnest next year, and that will require a newer version of HDMI and a newer version of DisplayPort. Thunderbolt 3 only carries DisplayPort 1.2 at the moment since it's capable of carrying two full outputs' worth of bandwidth, and dual DisplayPort 1.3 would require more bandwidth than Thunderbolt 3 has, even if you were ok having no bandwidth left over for PCIe traffic to support other functions on, say, a Thunderbolt dock. Therefore, you may want to consider holding off until you can buy a laptop with newer display outputs that support HDR displays, lest you feel once again that you bought a gaming laptop that doesn't handle gaming. If you haven't seen good HDR on a high-end TV yet, it's awesome, and a MUCH bigger difference than 4K.