Apparently, Nvidia is denying it. PC Perspective - NVIDIA Exiting Chipset Business? We take another look... Site says Nvidia will exit chipset biz, Nvidia denies - The Tech Report
I don't think they will quit. They have invested too much into the chipset business to quit. They even snubbed Intel and sacrifice the huge business that would have brought just to continue making their own chipsets. IMHO, the 790i was a rushed chipset. When I first saw the design, it looked like they hurriedly tacked on the PCI-E bridge chip (which used an overclock PCI-E interconnect) just to add triple SLI support.