Gtx 675m really worth it?

[Slaughteredyofish]

is the gtx 675m really 60% faster than the gtx 660m? And is it worth the 250$ more? I'd get the HD 7970m but it doesn't work with the 3D 120Hz screen from nvidia
And yes I do have a desktop

 

[dudewitbow]

the 675m is faster than the 660m, but the 660m uses the newer architecture(kepler) as the 675 is just a fermi card(the architecture used in gtx 4xx and 5xx cards).

a 660m would be closer to a 7750 while the 675m is closer to a 6850