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Intel Core 2 Duo E6400 vs T6400

Mini Review

Intel Core 2 Duo E6400 advantages

  • In single-threaded programs, the processor is 3% faster. The difference in performance depends on specific task. In some of them the microprocessor could be up to 6% faster.
  • Multi-threaded performance of the Intel Core 2 Duo E6400 CPU is better. The performance advantage depends on specific program. In some of them this microprocessor could be up to 6% faster.
  • Memory performance of the Intel Core 2 Duo E6400 processor is better.
  • The Core 2 Duo E6400 provides hardware acceleration of virtualized tasks.

Intel Core 2 Duo T6400 advantages

  • The microprocessor features SSE4.1 instructions.
  • The T6400 is 46% more energy efficient than the Intel E6400 processor.

E6400 vs T6400 performance comparison

The charts in the table below illustrate relative performance of Core 2 Duo E6400 and Core 2 Duo T6400 microprocessors in a number of different kinds of programs. The numbers for 'Single-threaded performance', 'Multi-threaded performance' and 'Discrete Graphics performance' charts are calculated as an average of several related benchmarks, that you can view in the "Benchmarks" tab. As such, performance in individual benchmarks may be lower or higher than what you see in the charts below. The 'Overall performance' chart shows an average of all-around performance benchmarks, and benchmarks, specific to each task type.
Single-threaded performance
2
1.6
1.2
0.8
0.4
0
 
 
1.03
 
1
 
 
Higher is better
Multi-threaded performance
2
1.6
1.2
0.8
0.4
0
 
 
1.02
 
1
 
 
Higher is better
Memory-intensive applications
2
1.6
1.2
0.8
0.4
0
 
 
1.09
 
1
 
 
Higher is better
Discrete Graphics performance
2
1.6
1.2
0.8
0.4
0
 
 
1
 
1
 
 
Higher is better
Overall performance
2
1.6
1.2
0.8
0.4
0
 
 
1.03
 
1
 
 
Higher is better
 

  - Intel Core 2 Duo E6400       - Intel Core 2 Duo T6400

Please see the "Benchmarks" tab for complete list of benchmarks, showing performance difference between E6400 and Intel T6400 in various types of applications.


E6400 vs T6400 power consumption comparison

Thermal Design Power
80
64
48
32
16
0
 
 
65W
 
35W
 
 
Lower is better
 

Detailed side by side comparison of Intel E6400 vs Intel Core 2 Duo T6400 specs can be found in the "Specifications" tab. Even more detailed comparison of low level features of both CPUs you will find in the "CPUIDs" tab.


Pros and Cons summary

Core 2 Duo E6400 Core 2 Duo T6400
General recommendations:
A bit faster in general
  General recommendations:
Supports SSE4.1 instructions,
Needs less power

Drawbacks:

Lacks some instructions,
Much higher power consumption
 

Drawbacks:

Performs insignificantly worse in all types of applications

Similar processors

Core 2 Duo E6400 Core 2 Duo T6400
 

Similar microprocessors use the same socket and architecture as Core 2 Duo E6400 and T6400, however their performance and other characteristics are a bit different.

Jump to:
  • Benchmarks
  • CPUIDs

More comparisons

Compare Intel Core 2 Duo E6400 with...

Other Core 2 Duo Mobile CPU:

Any CPU:


Compare Intel Core 2 Duo T6400 with...

Other Core 2 Duo 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
  Core
  Pentium 4 800FSB
  AMD 3.3GHz 8MB

Specifications

Please visit Intel Core 2 Duo E6400 and Intel Core 2 Duo T6400 pages for more detailed specifications of both microprocessors.

 Intel Core 2 Duo E6400Intel Core 2 Duo T6400
Market segmentDesktopMobile
ManufacturerIntel
FamilyCore 2 DuoCore 2 Duo Mobile
Basic details
Model numberE6400T6400
CPU part numberHH80557PH0462MAW80577GG0412MA
Box part numberBX80557E6400 
Introduction dateJuly 27, 2006January 31, 2009
 
CPU features
Core nameConroe|AllendalePenryn
MicroarchitectureCore
Technology (micron)0.0650.045
Data width (bits)64
SocketSocket 775Socket P
Frequency (MHz)21332000
Bus speed (MHz)1066800
Clock Multiplier810
L1 cache64 KB (code) / 64 KB (data)
L2 cache (KB)2048
Max temperature (°C)61.4105
TDP (Watt)6535
Max power dissipation (Watt)104.63 
Core voltage (V)0.85 - 1.51 - 1.25
Cores2
Threads2
Multiprocessing1
 
Instruction set extensions
AMD64 / EM64T 64-bit technology+
MMX+
SSE+
SSE2+
SSE3+
SSE4.1-+
SSSE3 / Supplemental SSE3+
 
Supported technologies
PowerNow! / Enhanced SpeedStep+
Virtualization+-
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 Core 2 Duo E6400" or "Intel Core 2 Duo T6400" parts please click on the links in the table header.

Benchmarks

System setup

Below is a complete set of Intel Core 2 Duo E6400 and T6400 benchmarks from our CPU benchmark database. The former processor was tested on ASRock 4Core1600Twins-P35 motherboard with 2 GB dual-channel Corsair CM3X1024-1333C9 DDR3 memory, and Powercolor 24PRO256M DDR2 (ATI Radeon HD2400). The latter processor was tested on MSI Fuzzy GM965 (MS-9803 V1.0) motherboard, that had 2GB dual-channel Corsair CM2X1024-6400C4 memory, and Powercolor 24PRO256M DDR2 (ATI Radeon HD2400) graphics.

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.


Core 2 Duo E6400 vs T6400 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 Core 2 Duo E6400           Intel Core 2 Duo T6400

3DMark03 CPU score benchmark

Uses DirectX software vertex shader to run Wings of Fury and Trolls' Lair games, and calculates a 3DMark03 CPU score based on averaged number of frames per second, achieved by the CPU/GPU combination.
100%
94.0%

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.
100%
99.9%

PCMark2002 CPU score benchmark

100%
92.9%

Super PI (1M) benchmark

Measures time, required to calculate the first 1 million digits after the decimal point in the number Pi.
100%
94.0%


Core 2 Duo E6400 vs T6400 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 Core 2 Duo E6400           Intel Core 2 Duo T6400

CINEBENCH R10 CPU score benchmark

Measures performance of multi-core rendering of a photo-realistic 3D image using CINEMA 4D software engine.
100%
99.9%

CINEBENCH R10 render time (seconds) benchmark

Measures time taken to render a photo-realistic 3D image using CINEMA 4D software engine.
100%
99.9%

Euler3D benchmark

100%
94.5%

Sandra Dhrystone (MIPS) benchmark

Runs Dhrystone test on all cores, and reports estimated integer performance in MIPS (Millions of Instructions Per Second).
100%
95.9%

Sandra MultiMedia Floating Point (it/s) benchmark

100%
93.8%

    Intel Core 2 Duo E6400           Intel Core 2 Duo T6400

Sandra MultiMedia Integer (it/s) benchmark

100%
93.3%

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).
100%
97.2%

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).
100%
94.9%

wPrime v1.55 (32M) benchmark

wPrime benchmark measures time taken to calculate square roots of numbers from 1 to 33554431.
100%
99.1%


Core 2 Duo E6400 vs T6400 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 Core 2 Duo E6400           Intel Core 2 Duo T6400

3DMark03 game score benchmark

Measures graphics and 3D game performance of discrete and integrated GPUs using 4 different game simulations, that have varying level of DirectX support from version 7 to version 9.
100%
99.8%

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.
100%
98.9%

CINEBENCH R10 OpenGL score benchmark

100%
99.5%


Core 2 Duo E6400 vs T6400 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 Core 2 Duo E6400           Intel Core 2 Duo T6400

7Zip compressing/decompressing speed (1 thread) benchmark

100%
93.3%

PCMark2002 Memory score benchmark

100%
92.1%

WinRAR compressing/decompressing speed benchmark

100%
92.1%

CPUIDs

The table below compares two random CPUID records for Intel Core 2 Duo E6400 and Intel Core 2 Duo T6400 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 FamilyCore 2 DuoCore 2 Duo Mobile
Model / Processor NumberE6400T6400
Frequency2133 MHz1995 MHz
CWID version0.40.3
Part numberHH80557PH0462MAW80577GG0412MA
S-Spec / Stepping CodeSL9S9SLGJ4
 
General information
VendorGenuineIntel
Processor name (BIOS)Intel(R) Core(TM)2 CPU 6400 @ 2.13GHzIntel(R) Core(TM)2 Duo CPU T6400 @ 2.00GHz
Cores2
Logical processors2
Processor typeOriginal OEM Processor
CPUID signature6F61067A
Family 6 (06h)
Model15 (0Fh)23 (017h)
Stepping 6 (06h)10 (0Ah)
TLB/Cache details64-byte Prefetching
Data TLB: 4-KB Pages, 4-way set associative, 256 entries
Data TLB: 4-MB Pages, 4-way set associative, 32 entries
Instruction TLB: 2-MB pages, 4-way, 8 entries or 4M pages, 4-way, 4 entries
Instruction TLB: 4-KB Pages, 4-way set associative, 128 entries
L1 Data TLB: 4-KB pages, 4-way set associative, 16 entries
L1 Data TLB: 4-MB pages, 4-way set associative, 16 entries
 
Cache
L1 data: Associativity8-way set associative
L1 data: CommentsDirect-mapped 
L1 data: Line size64 bytes
L1 data: Size2 x 32 KB32 KB
L1 instruction: Associativity8-way set associative
L1 instruction: CommentsDirect-mapped 
L1 instruction: Line size64 bytes
L1 instruction: Size2 x 32 KB32 KB
L2: Associativity8-way set associative
L2: CommentsNon-inclusive|Direct-mapped|Shared between all cores 
L2: Line size64 bytes
L2: Size2 MB
 
Instruction set extensions
MMX+
SSE+
SSE2+
SSE3+
SSE4.1-+
SSSE3+
 
Additional instructions
CLFLUSH+
CMOV+
CMPXCHG16B+
CMPXCHG8B+
FXSAVE/FXRSTORE+
MONITOR/MWAIT+
SYSENTER/SYSEXIT+
XSAVE/XRESTORE states-+
 
Major features
64-bit / Intel 64+
Enhanced SpeedStep+
Intel Virtualization+-
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+
Digital Thermal Sensor capability+
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+
Perfmon and Debug capability+
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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