The worlds second-largest PC chip maker and biggest seller of flash memory products has been hard hit by the downturn in computer sales and price competition with Intel Corp. To ignite demand, the Sunnyvale, Calif., company continues to pump out new products, such as last weeks launch of a notebook processor, the mobile Athlon XP 1800+, with a frequency of 1.53GHz. The chip, priced at $335 in 1,000-unit quantities, is AMDs first mobile chip offering since it released the mobile Athlon XP 1700+, clocked at 1.47GHz, in April.