iamacow :
The H stands for budget board, only the Z series supports SLI and not all of them either lol. I would buy a nicer board before SLIing with that board even if it could.
As far as chipset hierarchy goes, H170 is 2nd from the top in consumer chipsets for LGA1151 (Z170>H170>B150>H110). Unless you're overclocking or going multi GPU, there's not really much reason to go higher than an H170.