FSB Speed Questions

Phage0070 · 09-04-2008, 11:03 AM

I recently rebuild my computer but being a novice at CPU optimization I wanted to plumb the depths of the Cellar's knowledge in this area. My CPU seemed to be running a little slower than expected so I ran a progam called CPU-Z to find the relevant configuration info.

My question revolves around the FSB speed and if it is correct for my current setup. I am told that the automatic configuration tends to be a little too cautious and I may be loosing out on some speed. My FSB is 200 MHz with a multiplier of 15x, out of a rated 800 MHz. This gives me an FSB : DRAM of 3:5.

Does this make sense? Am I doing it wrong?

-------------------------
CPU-Z version 1.47
-------------------------

Processors Map
------------------------------------------------------------------------------------

Number of processors 1
Number of threads 2

Processor 0
-- Core 0
-- Thread 0
-- Thread 1

Processors Information
------------------------------------------------------------------------------------

Processor 1 (ID = 0)
Number of cores 1 (max 1)
Number of threads 2 (max 2)
Name Intel Pentium 4 531
Codename Prescott
Specification Intel(R) Pentium(R) 4 CPU 3.00GHz
Package Socket 775 LGA (platform ID = 4h)
CPUID F.4.9
Extended CPUID F.4
Core Stepping G1
Technology 90 nm
Core Speed 3000.2 MHz (15.0 x 200.0 MHz)
Rated Bus speed 800.0 MHz
Stock frequency 3000 MHz
Instructions sets MMX, SSE, SSE2, SSE3, EM64T
L1 Data cache 16 KBytes, 8-way set associative, 64-byte line size
Trace cache 12 Kuops, 8-way set associative
L2 cache 1024 KBytes, 8-way set associative, 64-byte line size
FID/VID Control no
Features

Chipset
------------------------------------------------------------------------------

Northbridge Intel i945G/GZ rev. A2
Southbridge Intel 82801GB (ICH7/R) rev. A1
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR2
Memory Size 2048 MBytes
Channels Dual
Memory Frequency 333.4 MHz (3:5)
CAS# 5.0
RAS# to CAS# 5
RAS# Precharge 5
Cycle Time (tRAS) 15
Bank Cycle Time (tRC) 21

Memory SPD
------------------------------------------------------------------------------

DIMM #1

General
Memory type DDR2
Module format Regular UDIMM
Manufacturer (ID) Kingston (7F98000000000000)
Size 1024 MBytes
Max bandwidth PC2-5300 (333 MHz)
Part number 9905316-005.A04LF
Serial number 7E18CBE3
Manufacturing date Week 07/Year 08

Attributes
Number of banks 2
Data width 64 bits
Correction None
Nominal Voltage 1.80 Volts
EPP no
XMP no

Timings table
Frequency (MHz) 200 266 333
CAS# 3.0 4.0 5.0
RAS# to CAS# delay 3 4 5
RAS# Precharge 3 4 5
TRAS 9 12 15
TRC 12 16 20

DIMM #2

General
Memory type DDR2
Module format Regular UDIMM
Manufacturer (ID) Kingston (7F98000000000000)
Size 1024 MBytes
Max bandwidth PC2-5300 (333 MHz)
Part number 9905316-005.A04LF
Serial number 7C18EEE3
Manufacturing date Week 07/Year 08

Attributes
Number of banks 2
Data width 64 bits
Correction None
Nominal Voltage 1.80 Volts
EPP no
XMP no

Timings table
Frequency (MHz) 200 266 333
CAS# 3.0 4.0 5.0
RAS# to CAS# delay 3 4 5
RAS# Precharge 3 4 5
TRAS 9 12 15
TRC 12 16 20

09-04-2008, 11:03 AM	#1
Phage0070 Snooty Borg Join Date: Dec 2007 Posts: 81	FSB Speed Questions I recently rebuild my computer but being a novice at CPU optimization I wanted to plumb the depths of the Cellar's knowledge in this area. My CPU seemed to be running a little slower than expected so I ran a progam called CPU-Z to find the relevant configuration info. My question revolves around the FSB speed and if it is correct for my current setup. I am told that the automatic configuration tends to be a little too cautious and I may be loosing out on some speed. My FSB is 200 MHz with a multiplier of 15x, out of a rated 800 MHz. This gives me an FSB : DRAM of 3:5. Does this make sense? Am I doing it wrong? ------------------------- CPU-Z version 1.47 ------------------------- Processors Map ------------------------------------------------------------------------------------ Number of processors 1 Number of threads 2 Processor 0 -- Core 0 -- Thread 0 -- Thread 1 Processors Information ------------------------------------------------------------------------------------ Processor 1 (ID = 0) Number of cores 1 (max 1) Number of threads 2 (max 2) Name Intel Pentium 4 531 Codename Prescott Specification Intel(R) Pentium(R) 4 CPU 3.00GHz Package Socket 775 LGA (platform ID = 4h) CPUID F.4.9 Extended CPUID F.4 Core Stepping G1 Technology 90 nm Core Speed 3000.2 MHz (15.0 x 200.0 MHz) Rated Bus speed 800.0 MHz Stock frequency 3000 MHz Instructions sets MMX, SSE, SSE2, SSE3, EM64T L1 Data cache 16 KBytes, 8-way set associative, 64-byte line size Trace cache 12 Kuops, 8-way set associative L2 cache 1024 KBytes, 8-way set associative, 64-byte line size FID/VID Control no Features Chipset ------------------------------------------------------------------------------ Northbridge Intel i945G/GZ rev. A2 Southbridge Intel 82801GB (ICH7/R) rev. A1 Graphic Interface PCI-Express PCI-E Link Width x16 PCI-E Max Link Width x16 Memory Type DDR2 Memory Size 2048 MBytes Channels Dual Memory Frequency 333.4 MHz (3:5) CAS# 5.0 RAS# to CAS# 5 RAS# Precharge 5 Cycle Time (tRAS) 15 Bank Cycle Time (tRC) 21 Memory SPD ------------------------------------------------------------------------------ DIMM #1 General Memory type DDR2 Module format Regular UDIMM Manufacturer (ID) Kingston (7F98000000000000) Size 1024 MBytes Max bandwidth PC2-5300 (333 MHz) Part number 9905316-005.A04LF Serial number 7E18CBE3 Manufacturing date Week 07/Year 08 Attributes Number of banks 2 Data width 64 bits Correction None Nominal Voltage 1.80 Volts EPP no XMP no Timings table Frequency (MHz) 200 266 333 CAS# 3.0 4.0 5.0 RAS# to CAS# delay 3 4 5 RAS# Precharge 3 4 5 TRAS 9 12 15 TRC 12 16 20 DIMM #2 General Memory type DDR2 Module format Regular UDIMM Manufacturer (ID) Kingston (7F98000000000000) Size 1024 MBytes Max bandwidth PC2-5300 (333 MHz) Part number 9905316-005.A04LF Serial number 7C18EEE3 Manufacturing date Week 07/Year 08 Attributes Number of banks 2 Data width 64 bits Correction None Nominal Voltage 1.80 Volts EPP no XMP no Timings table Frequency (MHz) 200 266 333 CAS# 3.0 4.0 5.0 RAS# to CAS# delay 3 4 5 RAS# Precharge 3 4 5 TRAS 9 12 15 TRC 12 16 20

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