Is AMD serious, I think they are throwing this news out because they have nothing else to get there stock moving as it sits near a 52 week low. QUITE PATHETIC AMD!!!!! ROCHESTER HILLS, Michigan, Feb 20 (Reuters) - Microsoft Corp.'s (MSFT.O: Quote, Profile , Research) new Windows Vista operating system will give a bigger boost to technology spending than many people now expect, Hector Ruiz, chief executive of computer chip maker Advanced Micro Devices Inc. (AMD.N: Quote, Profile , Research), said on Tuesday. "We're very optimistic about Vista and we think people are underestimating the impact it will have," Ruiz told Reuters after a speech at the Detroit Economic Club. Ruiz's comments followed cautionary remarks by Microsoft Chief Executive Steve Ballmer last Thursday that characterized Vista sales forecasts by some Wall Street analysts as "overly aggressive." Ballmer's remarks sent Microsoft's stock price down 2.7 percent, the biggest drop in 9 months. Shares in Microsoft gained as much as 11 cents after Ruiz's comments before giving up those increases to trade flat at $28.74. "Once people begin to taste it, I really think it will generate a lot of turnover and upgrading of technology at the consumer level," Ruiz said. Asked why he thought Vista was being underestimated, Ruiz said most people hadn't had a chance to see it and try it. "They haven't been exposed to it. It's hard to explain until you see it," Ruiz said. "When people experience it, I think they will really want it." After Intel Corp. (INTC.O: Quote, Profile , Research), AMD is the second-biggest maker of processors for personal computers. AMD shares were down 2 cents at $14.92 in mid-afternoon trading on the New York Stock Exchange.