A handful of things in life are certain: death, taxes (you better hurry!) and, after seeing the Nvidia GTX 680 drop for just $500, the eventual lowering of AMD Radeon 7900 series prices. That was the common theory, anyways, but several weeks have passed with nary a word from AMD. Could conventional wisdom be wrong? Nope! AMD was just biding its time. Today, the company slashed the prices of not only the 7900 series GPUs, but the low-end Radeon 7770, too.