Does GTX 660 support 1440p?
A single GTX 660 will give you playable frame rates at 1440p with some reduced settings. GTX 660s in SLI will allow the same settings with higher frame rates (probably hitting at maximum 60 FPS that can be displayed by your monitor).
Does GTX 660 support 1080p?
The GeForce GTX 660 is built for fast and fluid 1080p gaming in the latest DirectX 11 and NVIDIA PhysX-enabled games. Packed with all the Kepler features found in the flagship GTX 680, GeForce GTX 660 delivers the ideal fusion of power, performance, and affordability.
Can GTX 660 do 144hz?
The GTX 660 will support 144 Hz at 1080p over HDMI provided the monitor also supports it, or up to 200 Hz at 1080p or 120 Hz at 1440p over DisplayPort.