My apologies for the long post!
Hope this is the info your after, I quite don't understand it
myself...
The 2 remaining sticks of RAM are:
256mb PC2-3200U (the BIOS at the time indicated 400mhz).
Below is the current RAM at 1gig.
Number of CPUs 2 (1 Physical)
CPU #1
APIC ID 0
Name Intel Pentium 4 520
Code name Prescott
Specification Intel(R) Pentium(R) 4 CPU 2.80GHz
Family/Model/Stepping F34
Extended Family/Model 0/0
Package LGA775
Core Stepping D0
Technology 90nm
Instructions Sets MMX, SSE, SSE2, SSE3
Features
Clock Speed 2793.0 MHz
Clock multiplier x14.0
Front Side Bus Frequency 199.5 MHz
Bus Speed 798.0 MHz
Stock frequency 2800 MHz
L1 Data Cache 16 KBytes, 8-way set associative, 64 Bytes line size
L1 Trace Cache 12 Kµops, 8-way set associative
L2 Cache 1024 KBytes, 8-way set associative, 64 Bytes line size
L2 Speed 2793.0 MHz (Full)
L2 Location On Chip
L2 Data Prefetch Logic yes
L2 Bus Width 256 bits
Chipset
------------------------------------------------------------------------------
Northbridge Intel i915P/i915G rev. B1
Southbridge Intel 82801FB (ICH6) rev. 03
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR2
Memory Size 1024 MBytes
Memory Frequency 266.0 MHz (3:4)
CAS# 4.0
RAS# to CAS# 4
RAS# Precharge 4
Cycle Time (tRAS) 12
Memory SPD
------------------------------------------------------------------------------
DIMM #1
General
Memory type DDR2-SDRAM
Manufacturer (ID) (0000000000000000)
Size 512 MBytes
Max bandwidth PC4300 (266 MHz)
Part number
Manufacturing date Week 00/Year 00
Attributes
Number of banks 2
Data width 64 bits
Correction None
Timings table
Frequency (MHz) 200 266 266
CAS# 3.0 4.0 5.0
RAS# to CAS# delay 3 4 4
RAS# Precharge 3 4 4
TRAS# 9 12 12
DIMM #3
General
Memory type DDR2-SDRAM
Manufacturer (ID) (0000000000000000)
Size 512 MBytes
Max bandwidth PC4300 (266 MHz)
Part number
Manufacturing date Week 00/Year 00
Attributes
Number of banks 2
Data width 64 bits
Correction None
Timings table
Frequency (MHz) 200 266 266
CAS# 3.0 4.0 5.0
RAS# to CAS# delay 3 4 4
RAS# Precharge 3 4 4
TRAS# 9 12 12