Intel Pentium 4 User Manual

Additional Design Considerations
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 191
10 Additional Design Considerations
This section documents system design considerations not addressed in previous sections.
10.1.1 Retention Mechanism Placement and Keepouts
The RM requires a keepout zone for a limited component height area under the RM. Figure 137
and Figure 138 show the relationship between the RM mounting holes and pin one of the socket.
In addition they also document the keepouts. A 0.409 inch diameter routing keepout should be
maintained on the secondary side of the board.
The retention holes should be a non-plated hole. Figure 139 illustrates the hole locations and
keepouts for the Intel 850 chipset heatsink retention mechanism. For heatsink volumetric
information refer to the Intel
®
Pentium
®
4 Processor in the 478-pin Package Thermal Design
Guidelines.

Intel Pentium 4 Specifications

General

Architecture	x86
Core Count	1
Microarchitecture	NetBurst
Manufacturer	Intel
Core Names	Willamette, Northwood, Prescott, Cedar Mill
Virtualization Technology	No
Release Date	November 20, 2000
Clock Speed	1.3 GHz to 3.8 GHz
FSB Speed	400 MHz to 1066 MHz
Socket	Socket 423, Socket 478, LGA 775
Introduced	2000
Product Line	Pentium
Front Side Bus	400 MHz to 1066 MHz
Hyper-Threading	Yes (Prescott and later)
64-bit Support	Yes (Prescott and later)
Instruction Set	MMX, SSE, SSE2, SSE3
Discontinued	2008
Process Technology	180 nm, 130 nm, 90 nm, 65 nm
L2 Cache	256 KB, 512 KB, 1 MB, 2 MB
Lithography	180 nm, 130 nm, 90 nm, 65 nm
L1 Cache	8 KB