The Inquirer rounds up the expected release dates of some new graphics cards and chipsets from both AMD and NVIDIA:
RV670 aka the Radeon HD 2950: November 19 (formerly 15).
RD790 aka the Radeon Express 790FX: November 20 (formerly 5)
RX780 aka the AMD 770: November 20 (formerly 5)
G92 aka the GeForce 8800 GT: October 29 (formerly November 12)
C72 aka the nForce 780i: November 12
C73 aka the nForce 790i: January (formerly December)
C72P aka the nForce 750i: November 12
Also watch out for AMD variants (MCP72 and MCP72P) of the 780 chipset on November 12. C73 is notable as it includes support for DDR3.