You obviously need to get the VRAM cooled for flagship cards like GTX 570/580. If you don't, there's a risk it will burn and fail. Once there are physical damage, you cannot RMA it anymore.

You can buy RAM sinks and put on those VRM's so that heat could dissipate better. The other reason why people design full blocks for high end cards is because the VRM really needs to be cooled, we're talking about massive power consumption at load. The Arctic coolers supports ALL non reference cards.

Twin Turbo PRO does not support 570/580. You need Xtreme Plus 2 for that

Sure boss, definitely