What article was this posted in? I have not seen any that say 4GB, yet alone 6GB, isn't enough for 1080P.
quote Anandtech
"Once again though, we've observed that VRAM is never enough. It was only a few years ago that 8GB of VRAM was considered excessive, only useful for 4K. But especially with the popularity of
HD texture packs, even 6GB of framebuffer could prove limiting at 1080p with graphically demanding games. In that respect, the RX 590's 8GB keeps it covered but also brings additional horsepower over the 8GB R9 390. For memoryhogging games like Shadow of War, Wolfenstein II, or now Far Cry 5 (
with HD textures), the 8GBs go a long way. Even at 1080p, GTX 980/970 performance in Wolfenstein II tanks because of the lack of framebuffer. For those looking to upgrade from 2GB or 4GB cards, both the RX 580 and RX 590 should be of interest."
4gb is enough for 1080p games on HIGH settings.
I've said this a million times, you don't buy a $180 card to play with every single setting maxed.
Ultra settings vs high settings = NO PERCEIVABLE DIFFERENCE.
Some games will UTILIZE more than 4gb of memory but don't REQUIRE IT.
Save your money, 4gb will be fine, you will need to upgrade the card before 4gb vram ever makes a difference.
my 2 cents