http://www.anandtech.com/video/showdoc.aspx?i=3553
AMD launched the HD4770 today, their first 40nm desktop chip, which performs the same as the HD4850 give or take 5% and costs $99 after rebate. Typical power consumption is also 20% lower than the HD4850. The chip was intended to replace the HD4830 but performance is so much higher that really you would buy it instead of an HD4850. It also beats all of Nvidia's non-GTX2xx offerings across the board.
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3554
Also today, AMD launched a 2.8GHz Phenom-based dual-core called the Athlon X2 7850, at $69. Anandtech compared it to Intel's nearest offering, the $74 Pentium E5300, and concluded that for a gaming box you should choose the Athlon and anything else the Pentium.
