Thursday's Tech Winners & Losers

Updated from 1:07 p.m. EDT

Shares of RF Micro Devices(RFMD Quote) were among technology's losers Thursday, slumping 10.8% after the chipmaker backed its fourth-quarter guidance but warned that first-quarter results would be lower than Wall Street's forecast.

For the fourth quarter ended March 31, the company continues to see fourth-quarter adjusted earnings of 10 cents to 11 cents a share on revenue of $250 million to $260 million. Analysts polled by Thomson First Call project earnings of 11 cents a share on revenue of $255.6 million.

Looking ahead, RF Micro Devices sees first-quarter earnings and revenue falling below fourth-quarter results. Analysts, however, project earnings of 11 cents a share on revenue of $264.2 million. Shares fell 76 cents to $6.31.

Super Micro Computer(SMCI Quote), a maker of computer servers, jumped 9.5% on its first day of trading. The company's initial public offering priced at $8 a share, below its proposed range of $9.50 to $11.50 a share. The offering of 8 million shares raised $64 million. Merrill Lynch led the underwriting syndicate. Shares rose 76 cents to $8.76.

Shares of CDC(CHINA Quote) fell 8.1% after the Internet-services company posted in-line fourth-quarter earnings and backed its 2007 guidance. The company posted adjusted earnings of $8.8 million, or 7 cents a share, on revenue of $89 million. Analysts expected earnings of 7 cents a share on revenue of $87.7 million. During the year-earlier quarter, the company earned $6.4 million, or 6 cents a share, on revenue of $62.3 million.

Looking ahead, CDC continues to see 2007 adjusted earnings of $57 million to $62 million on revenue of $415 million to $420 million. Analysts project earnings of $60.2 million on revenue of $413.2 million. Shares were trading down 78 cents to $8.88.