Auburn's 34-28 victory over Alabama drew an overnight rating of 8.6, the second-highest rated college football game this season behind Alabama-Texas A&M, according to CBS.

The rating was up 291 percent from last year's 2.2 for the 2012 Iron Bowl. An overnight rating represent viewership numbers from metered markets from some of the highest-populated areas and is not a final number.

Not surprisingly, Birmingham was the highest-rated market with a 57.3 rating/82 share, followed by Knoxville (20.2 rating); Columbus, Ohio (20.1); Nashville (19.1); and New Orleans (17.3). The share figure means 82 percent of Birmingham-area television sets in use during that time watched the Iron Bowl.

CBS has the top three-rated college football games of the season: Alabama-Texas A&M (9.0), Alabama-LSU (6.9) and now Alabama-Auburn. Before the Iron Bowl, CBS was averaging a 4.0, the highest for SEC games on CBS at this point in the season since CBS began primarily airing SEC games in 2001. The highest single-season SEC on CBS rating was a 4.4 in 2009, a figure CBS seems poised to surpass this season.