Re: Planned upgrades
It don't think it's gonna perform better than the R7-265. You are also gonna have the cons of having 2 GPU's in a system. (heat, noise, power draw and comparability) not all games has good multi GPU support.
I would go for the single R7-265.
MOBO: Asus Maximus 6 Hero - GPU: Gigabyte GTX 980ti xtreme - CPU: I7-4770K - PSU: Corsair AX760
RAM: Corsair Vantage 2x4GB - SSD: Samsung 840 Evo 512GB - Case: NZXT H440