Pentium 4 - Processor Cores

Processor Cores

The Pentium 4 has an integrated heat spreader (IHS) that prevents the die from accidentally getting damaged when mounting and unmounting cooling solutions. Prior to the IHS, a CPU shim was sometimes used by people worried about damaging the core. Overclockers sometimes removed the IHS on Socket 423 and Socket 478 chips to allow for more direct heat transfer. On processors using the Socket LGA 775 (Socket T) interface, the IHS is directly soldered to the die(s), meaning that the IHS can not be easily removed.

Intel Pentium 4 processor family
Desktop			Laptop
Code-named	Core	Date released	Code-named	Core	Date released
Willamette Northwood Prescott	180 nm 130 nm 90 nm	Nov 2000 Jan 2002 Mar 2004	Northwood	130 nm	Jun 2003
			Northwood	130 nm	Apr 2002

Northwood Prescott Prescott 2M Cedar Mill	130 nm 90 nm 90 nm 65 nm	May 2003 Feb 2004 Feb 2005 Jan 2006	Northwood Prescott	130 nm 90 nm	Sep 2003 Jun 2004
Gallatin XE Prescott 2M XE	130 nm 90 nm	Sep 2003 Feb 2005