The general consensus is that the design of the cards is flawed. You can put thermal pads on them to patch up the problem, or flash a BIOS that runs the fans really loud to push more heat away. But in general the lifetime of these cards will probably be shorter than other cards from other manufacturers and when they die, they will probably do so spectacularly through self-immolation.
If you're within your 30 days return period, return the card and buy one from MSI, Asus, Gigabyte, Palit, or even a reference card. It's not worth the hassle of keeping these cards.
If you're outside your 30 days, you can try and convince the store to take it back because it's fundamentally defective. Otherwise you can just ride it out and buy a different brand in the future when the one you have now dies.
It's not clear why with many stories and Youtube videos flooding the Internet why EVGA refuses to just recall all the cards. They're doing wonders for their reputation by pretending there's nothing really wrong and issuing band-aid fixes like a BIOS that runs the fans really loud or thermal pads the owner has to install themselves unless they RMA the card. Meanwhile cards are exploding live on Youtube. Most people already know that the EVGA ACX coolers are pretty crappy compared to every other aftermarket cooling solution so also having fundamental design flaws isn't going to help future EVGA product sales.