April 25 (Reuters) - Intel ( INTC ) forecast

second-quarter revenue below market estimates on Thursday, as it

faces weak demand for its traditional data center and personal

computer chips amid efforts to build its contract manufacturing

business.

The Santa Clara, California-based company expects

second-quarter revenue in the range of $12.5 billion to $13.5

billion, compared with analysts' average estimate of $13.57

billion, according to LSEG data.