Sorry, but AMD is just a big Piece of Garbage. I have 2x AMD 6870 and they still don't work properly. On every Second Game, i face Huge Problems and I have to disable Crossfire (Big lags, strange Harddisc load, etc.). I tried every new Driver release and the Beta Drivers, and it's still Buggy as hell. The CCC is rubbish too, it's Buggy too and not well Programmed. I tried to Play COD Ghosts, and the AMD Drivers kept crashing, I tried one single Card and every possible fix but it didn't helped too (Ok, Cod Ghost is poorly programmed too). On my Research for the crashs, I found hundreds of Forum Answers with similar issues. I once was a big fan of ATi/AMD, because it supports 3 Monitors and even more in CF Mode, and the Performance is good, but the Driver and the Management Software is so poorly implemented, that I will Switch to Nvidia. And no, there wasn't a single Fix for my Problems in the last 3 Years, so don't tell People that AMD fix their bugs, it's just not true. Another Thing is, that you should never buy 2 or more GC, either CF nor SLI, it's just not worth it and you will loose a lot of time, Money and health by doing it. I tried to proof the opposit by using CF, but I failed. And until Today, there is no fix for the AMD Driver, it keeps crashing, and I did absolutely every tip i found in the net. I lost every trust in AMD Graphics and now I have two 200$ Graphic Cards laying around for nothing. I took an older Nvidia Card and had not a single Problem since then.
Fazit: There are heavy Problems witch AMD Cards, Drivers and Software. The chances are big that you will get Trouble if you buy one. This is at least my opinion.