Perhaps we were expecting too much, but the Radeon HD 5770 was a little underwhelming in our books. Where performance is concerned, we expected it to be positioned in between the Radeon HD 4890 and HD 4870, but our tests have shown that it was mostly a smidge lower than the HD 4870 1GB editions; which puts it closer to the 512MB edition of the Radeon HD 4870. The Radeon HD 5770 was also no match for NVIDIA's GeForce GTX 275 and GTX 260+.


http://www.hardwarezone.com/articles...036&cid=3&pg=1