What is the nvidia rival to the radeon 6670?

[generalramen]

As a side note can someone also tell me the amd rival to the gtx550 ti? Thanks

 

[djangoringo]

640 GT/450 gts.
For the 550 ti, the 7750/7770.

 

[andrewcarr]

Rival at the same price or same performance?
Price would be
6670 (GDDR5) to GT 440 (GDDR5)
550 Ti to 7770
Performance would be
6670 (GDDR5) to GT 640
550 Ti to 7750 or 6770