Hello, I'm considering adding another Radeon R9 270x to my rig. I can't say I've ever seen anyone have two of the same cards of different brands. In theory, I would assume it should work, but I'd like to be as careful as possible; I'd rather not blow a lot of money on something that won't do its intended job. I have the Gigabyte R9 270x in my rig, and I want to go with an Asus for the other, or perhaps sapphire. \