Versus the similarly priced 6770 and 550 TI, the 7770 is much faster. Reference 7770s are right behind the reference 6850 in performance and the most factory overclocked 7770s (a more than 15% faster than reference model is available for under $140) can fight it out with 6870s. The GTX 560 TI is still the fastest card. A very highly overclocked 7770 could catch a reference 560 TI, but it won't beat an overclocked 560 TI. However, the 7770 will be cheaper and use far less power than the 560 TI. A highly overclocked 7770 would use less power than the reference 560 TI. Heck, a highly overclocked 7770 would use less power than a reference 560 or reference 6870, despite beating them in performance.