Dell Computer Corp in Austin, Texas.

Talks to take Dell private are at an advanced stage with at least four major banks lined up to provide financing, two sources with knowledge of the matter told Reuters, propelling shares of the No. 3 computer maker 7 percent higher.

Buyout firm Silver Lake Partners, which is leading the deal, tapped Credit Suisse, Bank of America Merrill Lynch, Barclays and RBC late last year to finance a potential deal, the sources said on condition of anonymity, because details have not been made public.