Intel Pentium 4 User Manual

Memory Interface Routing
R
92 Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide
The following figure and table document the Direct Rambus channel topology for a 28 Ω channel.
Figure 57. Example Direct Rambus Channel Routing
MCH
MCH to
1
st
RIMM
RIMM to
RIMM
RIMM to
Termination
A
B
C
Term
NOTE: This diagram only illustrates the routing of one Direct Rambus channel. However, the example routing
shown can be applied to both channels.
Table 22. Direct Rambus RSL Signal Lengths for Rambus RIMM* Connectors on Motherboard
Reference
Section
Trace Description Trace
Length
300/400 MHz
RDRAM
Technolgty
Trace Length
533 MHz
RDRAM
Technology
(Microstrip)
Trace
Length
533 MHz
RDRAM
Technology
(Stripline)
A MCH to first RIMM* connector for
Channel A or first RIMM
connector for Channel B
1 to 6 inches 1 to 4 inches 1 to 4 inches
B RIMM connector to RIMM
connector for the same channel.
0.4 to 1
inches
0.4 to 1 inches 0.4 to 1
inches
C RIMM connector to Termination 0 to 2
inches
(1)
0 to 2 inches
(1)
0 to 2
inches
(1)
D A+B 7 inches max 4.4 inches max 4.4 inches
max
NOTES:
1. Place termination resistors between RIMM connectors of the same channel to decrease trace length if
possible.
2. For MCH to first RIMM connector measurement, use CFM/CFM# (CTM/CTM# use a different trace
length calculation based on the formulas specified in Section 6.1.2.3)

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