I am planning to upgrade my current 4870 1GB GPU to R9 280X. Where I stay, this graphics card is available --> SAPPHIRE DUAL-X R9 280X 3GB GDDR5 OC I am unable to find any reviews for this specific Sapphire variant. Everyone is posting either Vapor-X or Toxic reviews and the ASUS R9280X-DC2T-3GD5 TOP reviews. It'll be great if anyone can let me know if SAPPHIRE DUAL-X R9 280X 3GB GDDR5 OC is good enough compared to other variants of same technology or not. I would just like to know the difference in terms of performance (compared to Vapor-X and ASUS variant). If anyone has any good links that compares these that would be nice too!