Maximum PC: Advanced Micro Devices (AMD) on Monday introduced what it claims is the industry's most powerful server graphics card, the AMD FirePro S10000. The Sunnyvale chip designer says the FirePro S10000 is the first professional-grade card to exceed 1 teraflop of double-precision floating-point performance (1.48 teraflops), as well as 5.91 teraflops of peak single-precision performance.
I like competition as much as the next guy but it seems AMD are a joke in reliability and with patching (also my 8120 couldn't run wow for shit).
I used to be hardcore Nvidia, but AMD has caught up feature-wise and AMD cards tend to run a bit cooler for the same performance. Ultimately my break from Nvidia was when they released their 8000 and 9000 series GeForce cards that ran absurdly hot - hell there was a lawsuit over the issue - never trusted Nvidia since.
(Also my GTX670 runs games much better and much quieter).