01-05-2015, 04:01 AM
I just throw a look into those u said and i found this:
AMD Radeon R9 290X Gigabyte OC 4GB DDR5
DVI/HDMI/DP/512bit/GV-R929XOC-4GD
And
GeForce GTX980 Gigabyte G1 4GB DDR5
DVI/HDMI/DP/256bit/GV-N980G1 GAMING-4GD
Radeon is cheaper but have bigger BUS width
AMD Radeon R9 290X Gigabyte OC 4GB DDR5
DVI/HDMI/DP/512bit/GV-R929XOC-4GD
And
GeForce GTX980 Gigabyte G1 4GB DDR5
DVI/HDMI/DP/256bit/GV-N980G1 GAMING-4GD
Radeon is cheaper but have bigger BUS width