AMD (Sunnyvale, Calif.) said it commenced a tender cash offer for up to $1 billion worth of outstanding 5.75 percent convertible senior notes due in 2012. AMD is offering debt holders $990 of every $1,000 in principal amount of notes. The offer is set to expire at midnight Eastern Time on Dec. 16.

AMD said it also intends to commence an offering, subject to market and other conditions, of $500 million aggregate principal amount of senior notes in a private offering. Some of the proceeds from this offering would also be used to buy back the 5.75 percent notes, AMD said.

Last week, Intel agreed to pay AMD $1.25 billion to settle all litigation between the two companies, including an antitrust litigation which was scheduled to go to trial next year.

AMD also announced it would redeem all outstanding principal amount of its 7.75 percent senior notes due 2012 on Dec. 18.

Shares of AMD rose on the debt retirement news, closing up 10.6 percent at $7.32 Wednesday.