which is the better gpu among these ?
1 : Galaxy NVIDIA GTX 750Ti 2GB OC 2 GB GDDR5 Graphics Card
2: MSI AMD/ATI R7 265 2GD5 OC 2 GB GDDR5 Graphics Card
3:ZOTAC NVIDIA GeForce GTX660 2GB 2 GB DDR5 Graphics Card
4: Sapphire AMD/ATI Radeon R9 270X with Boost OC 2 GB 2 GB DDR5 Graphics Card
my processor is i5 4670k and motherboard is asus z87k
1 : Galaxy NVIDIA GTX 750Ti 2GB OC 2 GB GDDR5 Graphics Card
2: MSI AMD/ATI R7 265 2GD5 OC 2 GB GDDR5 Graphics Card
3:ZOTAC NVIDIA GeForce GTX660 2GB 2 GB DDR5 Graphics Card
4: Sapphire AMD/ATI Radeon R9 270X with Boost OC 2 GB 2 GB DDR5 Graphics Card
my processor is i5 4670k and motherboard is asus z87k