Prescott, the next big desktop chip from Intel, is slated to come out at 3.4GHz, while Dothan, an energy-efficient chip for slim notebooks, will have a server-size cache and is expected to debut at 1.8GHz, according to computer industry sources. The Santa Clara, Calif.-based chipmaker is gearing up for a busy second half of the year with a slew of new chips and price cuts, according to an Intel presentation forwarded to CNET News.com as well as industry sources. Details about future server chips also came out. Prescott, which will come out in the fourth quarter, will contain a number of enhancements over the current Pentium 4, including new instructions for multimedia processing and a 1MB cache, a pool of memory on the chip for fast data access. Current Pentium 4s have a 512KB cache. The chip is slated come out at 3.4GHz, according to the sources, and then speed up to 3.6GHz in the first quarter of 2004. It is unclear whether the chip will be sold as a Pentium 4 or be renamed, but history indicates that the architectural changes would justify a new brand name. Prescott is expected to cost $637 in volume quantities. Although a release date was not specified, Intel plans to cut the prices on its other processors on Oct. 26 by up to 35 percent, the first Pentium 4 price cuts since June. Typically, price cuts and chip releases occur at about the same time.