Intel

(INTC) - Get Report

was down 25% in preopen

Island

trading on its first warning in two years, and the chip bellwether was pulling down other tech stocks.

Semiconductors showed some of the biggest losses, with

Atmel

(ATML)

down 12.4%;

Applied Materials

(AMAT) - Get Report

down 8.8%; and

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Rambus

(RMBS) - Get Report

down 9%.

Among other major tech issues,

Sun Microsystems

(SUNW) - Get Report

was down 4.7%;

Oracle

(ORCL) - Get Report

was off 5%; and

Cisco Systems

(CSCO) - Get Report

was down 4.7%.