Intel is again shipping its 3GHz Pentium 4 processor, a week after it halted shipments after discovering an "anomaly".
PC makers using the chip in their systems have been supplied with a software update to fix the issue, said Intel spokesman George Alfs.
Suppliers - including Hewlett-Packard, Dell Computer and Gateway - introduced desktop systems based on the chip when it was released last week.
The issue with the 3GHz Pentium 4 with support for an 800MHz system bus occurs only in rare circumstances and users are unlikely to be affected.
"The anomaly was an issue only seen in a lab environment on a small number of units undergoing stress testing. An end user probably would not see this anomaly in normal everyday use," Alfs said, although he would not detail what tests caused the problem.
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Intel would not specify how many of the new processors it had shipped before putting the product on hold. The chip maker typically starts shipping a new processor some time before the official launch, so that PC makers can have products ready.