I went to Fry's Electronics yesterday afternoon and had the opportunity to examine quite a few motherboards that were on display. I also checked articles and user reviews of that Gigabyte 780 board. The user reviews were not very good. I got the impression that Gigabyte has a quality control issue. The board has two heatsinks. The small square one was very loose. The plastic push-pins did not seem to do an adequate job. I doubt the heatsinks made good contact with the chipsets.
Any chance it is supposed to be that way? I saw Abit motherboards with heatsinks that were secured with metal screws instead of push-pins.