IMO the HD 5770 and GTX 465 shouldn't even be in the running - consider the HD 6850
Inpai just did a HD 6850CF vs GTX 580/HD 5970http://en.inpai.com.cn/doc/enshowcont.asp?id=7938&pageid=7671
Before reading the article, many readers may still think that efficient and compatibility of CrossFire is not well.In fact, I can tell you that after several years development,CrossFire technology is gradually improving, the user need not worry about these history problems. this test can verify this fact .
In this test, I deliberately put performance of HD6850 CF with performance of single card in order to facilitate comparison.You can see that after set up HD6850 CrossFire,the improvement of performance is very huge,It most games performance are better than GTX580and part at least on par with that of HD5970 and even has a slight advantageThis proves the efficiency of current CrossFire is very good,It absolute can bring better gaming experience to players.
Just has good performance but the power consumption is high will not make you be satisfied.But after this test,I can say that you need not worry about this problem any more.either standby or running high-load game, HD6850 CrossFire perform better than other flagship products.