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Intel Pentium 4 User Manual

Intel Pentium 4
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Platform Clock Routing Guidelines
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 57
4.4.2 66 MHz Clock Routing Length Guidelines
Table 8. 66 MHz Clock Routing Length Guidelines
Clock Group Length of Trace A (in) Length of Trace B (in) R1 ()
AGP_66 0” to 0.5” Z 33
CLK_66 0” to 0.5” Z + (4” – 5”) 33
NOTE: The routing length value of Z is 5 to 9 inches.
Figure 28 and Figure 29 show the recommended clock routing topologies for the 66 MHz clocks.
Figure 28. AGP_66 Clock Routing Topology
AGP Connector
R1
A
CK00
Clock
Synthesizer
B
Clk_Routing_AGP-66
Figure 29. CLK_66 Clock Routing Topology
R1
A
CK00
Clock
Synthesizer
MCH
R1
ICH2
AB
B
Clk_Routing_CLK-66
4.4.2.1 3V66 Clock Routing Requirement for Intel
®
82850E Platforms
The 3V66 trace (CK_G_66M_MCH) from the Clock Chip to MCH cannot be shorter than the
CPU Clock trace (CK_H_100M_MCH, CK_H_100M_MCH).

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Intel Pentium 4 Specifications

General IconGeneral
Architecturex86
Core Count1
MicroarchitectureNetBurst
ManufacturerIntel
Core NamesWillamette, Northwood, Prescott, Cedar Mill
Virtualization TechnologyNo
Release DateNovember 20, 2000
Clock Speed1.3 GHz to 3.8 GHz
FSB Speed400 MHz to 1066 MHz
SocketSocket 423, Socket 478, LGA 775
Introduced2000
Product LinePentium
Front Side Bus400 MHz to 1066 MHz
Hyper-ThreadingYes (Prescott and later)
64-bit SupportYes (Prescott and later)
Instruction SetMMX, SSE, SSE2, SSE3
Discontinued2008
Process Technology180 nm, 130 nm, 90 nm, 65 nm
L2 Cache256 KB, 512 KB, 1 MB, 2 MB
Lithography180 nm, 130 nm, 90 nm, 65 nm
L1 Cache8 KB

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