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Intel Pentium 4 640 vs Pentium D 805

Mini Review

Intel Pentium 4 640 advantages

  • Single-threaded performance of the processor is higher.
  • The Intel Pentium 4 640 performs 21% faster when running memory-intensive applications.
  • Power consumption of the 640 is lower.

Intel Pentium D 805 advantages

  • The 805 microprocessor is 47% faster in multi-threaded applications.

640 vs 805 performance comparison

The charts in the section below demonstrate performance of Pentium 4 640 and Pentium D 805 CPUs in different application types. The numbers in the charts are based on several benchmarks, that you can find in the "Benchmarks" tab. As such, performance in individual benchmarks may be better or worse than what you see in the charts on this page. We also averaged the results for task type specific benchmarks and all-around performance benchmarks, and presented them in the 'Overall performance' chart.
Single-threaded performance
2
1.6
1.2
0.8
0.4
0
 
 
1.23
 
1
 
 
Higher is better
Multi-threaded performance
2
1.6
1.2
0.8
0.4
0
 
 
1
 
1.47
 
 
Higher is better
Memory-intensive applications
2
1.6
1.2
0.8
0.4
0
 
 
1.21
 
1
 
 
Higher is better
Overall performance
2
1.6
1.2
0.8
0.4
0
 
 
1.04
 
1
 
 
Higher is better

  - Intel Pentium 4 640       - Intel Pentium D 805

Please see the "Benchmarks" tab for complete list of benchmarks, demonstrating performance difference between 640 and Intel Pentium D 805 in various types of tests.


640 vs 805 power consumption comparison

Thermal Design Power
110
88
66
44
22
0
 
 
84W
 
95W
 
 
Lower is better
 

Detailed side by side comparison of 640 vs Pentium D 805 specs can be found in the "Specifications" tab. Even more detailed comparison of low level features of both processors you will find in the "CPUIDs" tab.


Pros and Cons summary

Pentium 4 640 Pentium D 805
General recommendations:
A bit better overall performance,
Needs less power
  General recommendations:
Performs better in multi-threaded tasks

Drawbacks:

Somewhat slow in multi-threaded programs
 

Drawbacks:

Insignificantly worse overall performance,
Higher power

Similar processors

Pentium 4 640 Pentium D 805
 

Similar CPUs use the same socket and architecture as Pentium 4 640 and Intel Pentium D 805.

Jump to:
  • Benchmarks
  • CPUIDs
  • Comments
 

Compare CPUs

Compare Intel Pentium 4 640 with...

Other Pentium D CPU:

Any CPU:


Compare Intel Pentium D 805 with...

Other Pentium 4 CPU:

Any CPU:


Note: To see differences with any CPU, type in any combination of the following into the "Any CPU" field: manufacturer name, full or partial family name, model number, part number, core name, socket name, operating frequency, bus speed (must have FSB suffix), and the last level cache. Here are some valid searches:

  i5-3570K
  Intel Celeron 2 GHz
  Netburst
  Pentium 4 800FSB
  AMD 3.3GHz 8MB

Specifications

Please visit Intel Pentium 4 640 and Intel Pentium D 805 pages for more complete specifications of both microprocessors.

 Intel Pentium 4 640Intel Pentium D 805
Market segmentDesktop
ManufacturerIntel
FamilyPentium 4Pentium D
Basic details
Model number640805
CPU part numberJM80547PG0882MM
HH80547PG0882MM
HH80551PE0672MN
Box part numberBX80547PG3200F
BX80547PG3200FT
BX80551PE2666FN
Introduction dateFebruary 21, 2005 
 
CPU features
Core namePrescottSmithfield
MicroarchitectureNetburst
Technology (micron)0.09
Data width (bits)64
SocketSocket 775
Frequency (MHz)32002667
Bus speed (MHz)800533
Clock Multiplier1620
L1 cache16 KB (data)32 KB (data)
L2 cache (KB)2048
Max temperature (°C)66.664.1
TDP (Watt)8495
Max power dissipation (Watt)98.83127
Core voltage (V)1.2 - 1.4
Cores12
Threads2
 
Instruction set extensions
AMD64 / EM64T 64-bit technology+
MMX+
SSE+
SSE2+
SSE3+
 
Supported technologies
Hyper-Threading+-
SpeedStep+-
Virus Protection / Execute Disable bit+
 
Integrated Graphics
GPU TypeNone
 
Integrated Memory Controller(s)
The number of controllers0
Notes:

Rows with different specifications or features are highlighted.

For detailed specifications of "Intel Pentium 4 640" or "Intel Pentium D 805" parts please click on the links in the table header.

Benchmarks

System setup

Intel Pentium 4 640 and Pentium D 805 processors were tested using different system components, that are identified by MB, RAM and VID columns in the tables below. The numbers in each of these columns correspond to one of motherboards (MB), memory configurations (RAM) or graphics adapters (VID), listed below:

MB - Motherboard(s):
1. ASROCK 4CORE1600TWINS-P35
2. INTEL DP965LT

RAM - Memory:
1. 2 GB DUAL-CHANNEL CORSAIR CM3X1024-1333C9 DDR3
2. 2GB DUAL-CHANNEL CORSAIR CM2X1024-6400C4

VID - Video card(s):
1. POWERCOLOR 24PRO256M DDR2 (ATI RADEON HD2400)

All tests were performed at default frequency and voltage, using manufacturer's stock fan/heatsink. None of the components were overclocked. Motherboard BIOS options were left at default settings.

The results of all benchmarks are broken into four categories: multi-threaded, single-threaded, memory intensive and graphics / gaming.


Pentium 4 640 vs Pentium D 805 single-threaded benchmarks

Single-threaded benchmarks run on a single CPU core, and do not depend on such features as the number of cores, or Hyper-Threading technology. Additionally, they do not utilize on-chip caches, dedicated to other cores.

     

    Intel Pentium 4 640           Intel Pentium D 805

CINEBENCH R10 CPU score (1 core) benchmark

Measures performance of a single-core rendering of a photo-realistic 3D image using CINEMA 4D software engine.
Longer is better <MBRAMVID
100%221
99.9%111
81.5%221

PCMark2002 CPU score benchmark

Longer is better <MBRAMVID
100%221
99.8%111
83.1%221

Super PI (1M) benchmark

Measures time, required to calculate the first 1 million digits after the decimal point in the number Pi.
Longer is better <MBRAMVID
100%221
99.9%111
81.0%221


Pentium 4 640 vs Pentium D 805 multi-threaded benchmarks

Multi-threaded benchmarks utilize all CPU cores and other on-chip resources (on-chip caches, internal buffers, etc). Intel's Hyper-Threading feature also helps to improve multi-threading performance.

     

    Intel Pentium 4 640           Intel Pentium D 805

CINEBENCH R10 CPU score benchmark

Measures performance of multi-core rendering of a photo-realistic 3D image using CINEMA 4D software engine.
Longer is better <MBRAMVID
100%221
79.7%111
79.4%221

CINEBENCH R10 render time (seconds) benchmark

Measures time taken to render a photo-realistic 3D image using CINEMA 4D software engine.
Longer is better <MBRAMVID
100%221
79.7%111
79.3%221

Euler3D benchmark

Longer is better <MBRAMVID
100%221
54.4%111
49.1%221

Sandra Dhrystone (MIPS) benchmark

Runs Dhrystone test on all cores, and reports estimated integer performance in MIPS (Millions of Instructions Per Second).
Longer is better <MBRAMVID
100%221
64.3%111
64.1%221

Sandra MultiMedia Floating Point (it/s) benchmark

Longer is better <MBRAMVID
100%221
85.7%111
85.6%221

    Intel Pentium 4 640           Intel Pentium D 805

Sandra MultiMedia Integer (it/s) benchmark

Longer is better <MBRAMVID
100%221
76.6%111
76.5%221

Sandra Whetstone (MFLOPS) benchmark

Runs Whetstone test on all cores, and reports estimated floating-point performance in MFLOPS (Millions of Floating-Point Operations Per Second).
Longer is better <MBRAMVID
100%111
99.9%221
97.6%221

Sandra Whetstone SSE2 (MFLOPS) benchmark

Runs SSE2-enabled Whetstone test on all cores, and reports estimated floating-point performance in MFLOPS (Millions of Floating-Point Operations Per Second).
Longer is better <MBRAMVID
100%111
99.5%221
98.7%221

wPrime v1.55 (32M) benchmark

wPrime benchmark measures time taken to calculate square roots of numbers from 1 to 33554431.
Longer is better <MBRAMVID
100%221
73.3%111
73.2%221


Pentium 4 640 vs Pentium D 805 graphics benchmarks

Graphics benchmarks depend on the type of integrated or discrete graphics adapter, and to less extent on the processor performance. Because these benchmarks are synthetic, they may not truly represent gaming performance. However, they still can be used to estimate whether one processor will perform faster or slower than another CPU in games and other 3D tasks.

     

    Intel Pentium 4 640           Intel Pentium D 805

3DMark2001 score benchmark

Runs a series of game simulations and feature tests to measure graphics and 3D game performance of discrete and integrated GPUs. It utilizes a single CPU core, and it is compatible with DirectX 8 and later APIs.
Longer is better <MBRAMVID
100%111
99.8%221
94.8%221

CINEBENCH R10 OpenGL score benchmark

Longer is better <MBRAMVID
100%221
99.7%111
89.3%221


Pentium 4 640 vs Pentium D 805 memory performance

Memory-intensive tests or programs move large amounts of data to/from memory, and they depend more on memory throughput and the size of on-chip caches, rather than on CPU integer/FP/SIMD performance.

     

    Intel Pentium 4 640           Intel Pentium D 805

7Zip compressing/decompressing speed (1 thread) benchmark

Longer is better <MBRAMVID
100%221
93.1%221
93.0%111

PCMark2002 Memory score benchmark

Longer is better <MBRAMVID
100%111
99.9%221
53.0%221

WinRAR compressing/decompressing speed benchmark

Longer is better <MBRAMVID
100%221
97.4%111
81.5%221

CPUIDs

The table below compares two random CPUID records for Intel Pentium 4 640 and Intel Pentium D 805 microprocessors, that were submitted to our CPUID database. Please note that different steppings of Intel processors, identified by S-spec numbers or CPUID, may have slightly different features. For that reason the comparison table below only applies to CPUs with specific S-Spec number / CPUID.

  CPUID 1 CPUID 2
ManufacturerIntel
CPU FamilyPentium 4Pentium D
Model / Processor Number640805
Frequency3196 MHz2664 MHz
CWID version0.3
Part numberJM80547PG0882MMHH80551PE0672MN
S-Spec / Stepping CodeSL7Z8SL8ZH
 
General information
VendorGenuineIntel
Processor name (BIOS) Intel(R) Pentium(R) 4 CPU 3.20GHz Intel(R) Pentium(R) D CPU 2.66GHz
Cores12
Logical processors2
Processor typeOriginal OEM Processor
CPUID signatureF43F47
Family15 (0Fh)
Model 4 (04h)
Stepping 3 (03h) 7 (07h)
TLB/Cache detailsData TLB: 4-KB or 4-MB pages, fully associative, 64 entries
Instruction TLB: 4-KB, 2-MB or 4-MB pages, fully associative, 64 entries
No 2nd-level cache or, if processor contains a valid 2nd-level cache, no 3rd-level cache
Data TLB: 4-KB or 4-MB pages, fully associative, 64 entries
Instruction TLB: 4-KB, 2-MB or 4-MB pages, fully associative, 128 entries
No 2nd-level cache or, if processor contains a valid 2nd-level cache, no 3rd-level cache
 
Cache
L1 data: Associativity8-way set associative
L1 data: Commentssectored cache
L1 data: Line size64 bytes
L1 data: Size16 KB
L1 instruction: Associativity8-way set associative
L1 instruction: Size12K uops
L2: Associativity8-way set associative
L2: Comments sectored cache
L2: Line size64 bytes
L2: Size2 MB1 MB
 
Instruction set extensions
MMX+
SSE+
SSE2+
SSE3+
 
Additional instructions
CLFLUSH+
CMOV+
CMPXCHG16B+
CMPXCHG8B+
FXSAVE/FXRSTORE+
MONITOR/MWAIT+
SYSENTER/SYSEXIT+
 
Major features
64-bit / Intel 64+
Enhanced SpeedStep+-
Hyper-Threading Technology+-
NX bit/XD-bit+
On-chip Floating Point Unit+
 
Other features
36-bit page-size extensions+
64-bit debug store+
Advanced programmable interrupt controller+
CPL qualified debug store+
Debug store+
Debugging extensions+
L1 context ID+
LAHF / SAHF support in 64-bit mode-+
Machine check architecture+
Machine check exception+
Memory-type range registers+
Model-specific registers+
Page attribute table+
Page global extension+
Page-size extensions (4MB pages)+
Pending break enable+
Physical address extensions+
Self-snoop+
Thermal monitor+
Thermal monitor 2-+
Thermal monitor and software controlled clock facilities+
Time stamp counter+
Virtual 8086-mode enhancements+
xTPR Update Control+
+ - feature is supported
- - feature is not supported
Features, not supported by all processors in the table, are not displayed

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