For my first build, which I will use for gaming, should I use three
XFX Double Dissipation R7-260X-CDF4 Radeon R7 260X 2GB 128-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video ...
or one
XFX Black Edition Double D R9-280A-TDBD Radeon R9 280 3GB 384-Bit GDDR5 PCI Express 3.0 HDCP Ready CrossFireX Support Video Card
or two
EVGA 02G-P4-3063-KR GeForce GTX 660 2GB 192-bit GDDR5 PCI Express 3.0 SLI Support Video Card w/ ACX Cooler
XFX Double Dissipation R7-260X-CDF4 Radeon R7 260X 2GB 128-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video ...
or one
XFX Black Edition Double D R9-280A-TDBD Radeon R9 280 3GB 384-Bit GDDR5 PCI Express 3.0 HDCP Ready CrossFireX Support Video Card
or two
EVGA 02G-P4-3063-KR GeForce GTX 660 2GB 192-bit GDDR5 PCI Express 3.0 SLI Support Video Card w/ ACX Cooler