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Intel Core 2 Quad Q8400 vs Core i3-2100

Mini Review

Intel Core 2 Quad Q8400 advantages



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  • More CPU cores on the Intel Q8400 help to process multiple simultaneous threads or processes.

Intel Core i3-2100 advantages



Intel Core i3-2100
  • It is estimated that the microprocessor performs 50% faster when running single-threaded tasks.
  • Based on our estimates, multi-threaded performance of this CPU is better.
  • The processor has SSE4.2 instructions enabled.
  • The Core i3-2100 supports AVX instructions. These extensions are not broadly supported by applications yet, but their support should improve in future apps.
  • Like many modern microprocessors, the i3-2100 includes Graphics Processing Unit. While this GPU is not powerful enough to run latest games with all settings on, it can be used for casual gaming and 3D applications.
  • Power consumption of the Core i3-2100 microprocessor is lower.

Q8400 vs i3-2100 estimated performance

The charts in the table below show performance of Core 2 Quad Q8400 and Core i3-2100 processors. Results for Core i3-2100 were determined based on a variety of benchmarks. Performance numbers for Core 2 Quad Q8400 were approximated from benchmark results of other microprocessors with the same core and microarchitecture. It is important to note that the approximation has greater error of margin than results obtained using real-world tests. Also, this is an averaged performance, and the difference in individual benchmarks may be worse or better than what you see in the charts below.
Single-threaded performance
2
1.6
1.2
0.8
0.4
0
 
 
1
 
1.5
 
 
Higher is better
Multi-threaded performance
2
1.6
1.2
0.8
0.4
0
 
 
1
 
1.03
 
 
Higher is better

  - Intel Core 2 Quad Q8400       - Intel Core i3-2100

Q8400 vs i3-2100 specifications comparison

The graphs below demonstrate the difference between Core 2 Quad Q8400 and i3-2100 most important characteristics. These features, as well as an IPC (instructions per cycle) number, determine how well a microprocessor performs. The "Number of cores / threads" graph shows the number of cores (darker area). Lighter area on the graph corresponds to the number of additional threads, offered by Hyper-Threading technology. Darker area on the "On-chip cache" graph is for the On-chip L2 cache. Lighter area is for the L3 cache cache. Although the L3 cache cache is usually larger than the On-chip L2 cache, it is always slower.

The number of cores / threads
5
4
3
2
1
0
 
 
4
 
4
 
 
Higher is better
Operating frequency
4
3.2
2.4
1.6
0.8
0
 
 
2.67GHz
 
3.1GHz
 
 
Higher is better
On-chip L2 + L3 cache
5000
4000
3000
2000
1000
0
 
 
4096KB
 
3584KB
 
 
Higher is better
Thermal Design Power
110
88
66
44
22
0
 
 
95W
 
65W
 
 
Lower is better

  - Intel Core 2 Quad Q8400       - Intel Core i3-2100

Detailed side by side comparison of Q8400 vs Intel Core i3-2100 specs can be found in the "Specifications" tab.


Pros and Cons summary

Core 2 Quad Q8400 Core i3-2100
General recommendations:
More cores for better multi-threading performance
  General recommendations:
Somewhat faster in single- and multi-threaded programs,
Features SSE4.2 / AVX instructions,
Has on-chip HD 2000 graphics,
Needs less power

Drawbacks:

Lacks some instructions,
Does not have integrated GPU,
Higher power,
The socket is obsolete
 

Drawbacks:

Smaller number of CPU cores

Similar processors

Core 2 Quad Q8400 Core i3-2100
 

Similar CPUs use the same socket and architecture as Core 2 Quad Q8400 and Intel i3-2100, however their performance and other characteristics are a bit different.


Where to buy


The processors are obsolete. If you need one of them, the best place to search are auction websites, like eBay. Third party sellers at Amazon may also carry them.
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More comparisons

Compare Intel Core 2 Quad Q8400 with...

Other Core i3 CPU:

Any CPU:


Compare Intel Core i3-2100 with...

Other Core 2 Quad 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 Quad Q8400 and Intel Core i3-2100 pages for more detailed specifications of both microprocessors.

 Intel Core 2 Quad Q8400Intel Core i3-2100
Market segmentDesktop
ManufacturerIntel
FamilyCore 2 QuadCore i3
Basic details
Model numberQ8400i3-2100
CPU part numberAT80580PJ0674ML
AT80580PJ067HL
CM8062301061600
Box part numberBX80580Q8400
BXC80580Q8400
BX80623I32100
BXC80623I32100
Introduction dateApril 19, 2009February 20, 2011
 
CPU features
Core nameYorkfieldSandy Bridge
MicroarchitectureCoreSandy Bridge
Technology (micron)0.0450.032
Data width (bits)64
SocketSocket 775Socket 1155
Frequency (MHz)26673100
Bus speed (MHz)1333 
Clock Multiplier831
L1 cache128 KB (code) / 128 KB (data)64 KB (code) / 64 KB (data)
L2 cache (KB)4096512
L3 cache (KB) 3072
Max temperature (°C)71.469.1
TDP (Watt)9565
Core voltage (V)0.85 - 1.3625 
Cores42
Threads4
Multiprocessing1
 
Instruction set extensions
AMD64 / EM64T 64-bit technology+
AVX / Advanced Vector Extensions-+
MMX+
SSE+
SSE2+
SSE3+
SSE4.1+
SSE4.2-+
SSSE3 / Supplemental SSE3+
 
Supported technologies
Hyper-Threading-+
PowerNow! / Enhanced SpeedStep+
Virtualization+
Virus Protection / Execute Disable bit+
 
Integrated Graphics
GPU TypeNoneHD 2000
 
Integrated Memory Controller(s)
The number of controllers01
Notes:

Rows with different specifications or features are highlighted.

For detailed specifications of "Intel Core 2 Quad Q8400" or "Intel Core i3-2100" parts please click on the links in the table header.

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