I don´t like how xbitlabs copies things from other sites every day, makes up some comments on it (that are often wrong) and don´t even mention the site they got "their" story from - in fact, they make it seem like it came from "their sources". Check Gollem´s post for the original source.
Besides, I haven't heard anyone say nVidia is having trouble with 800MHz,
Chipsets from AMD, ALI/ULI, NVIDIA, SIS and VIA all support 800 Mhz aHT links this year. There is no such problem, who said there would be?