“King Kong” conquered Universal’s DVD sales records last week — selling around 6.5 million units in six days — for a monster debut that nonetheless couldn’t quite measure up to last month’s boffo disc bow of “Harry Potter and the Goblet of Fire.”

U pegged consumer spending at $100 million over “Kong’s” initial six-day period (March 28 through this past Sunday), a tally it said outpaced its previous top seller, “Meet the Fockers.” Universal did not provide first-week figures for “Fockers,” but other reports put first-day sales at 3 million units. Variety sister publication Video Business said U sold 7.8 million units of “Fockers” in 2005.

Warner sold 9 million units of “Goblet of Fire” its first week in stores, with around 5 million of those on the first day, March 7 (Daily Variety, March 15).

“King Kong” is U’s fourth highest grossing pic in its history, with $550 million generated worldwide to date. U’s top three grossers are “Jurassic Park,” “E.T.” and “The Lost World: Jurassic Park.”

Universal released two versions of “King Kong” on DVD: a two-disc collector’s edition priced at $30.98 and a single disc priced at $29.98.