2 Cores, 2 Threads @3.0GHz, Core.
Release date: Q1 2008.


4 Cores, 4 Threads @3.1GHz, Sandy Bridge.
Release date: Q1 2011.

Real World Speed
Performance profile from 113,149 user samples
40,155 User Benchmarks
Best Bench: 19% Base clock 4.4 GHz, turbo 4.25 GHz (avg)
Worst Bench: 12% Base clock 3 GHz, turbo 3 GHz (avg)
Poor: 12% Great: 19%
SPEED RANK: 843rd / 1182
Gaming 17%
Desktop 31%
Sail boat
Workstation 11%
Tree trunk
72,994 User Benchmarks
Best Bench: 54% Base clock 3.1 GHz, turbo 3.6 GHz (avg)
Worst Bench: 32% Base clock 3.1 GHz, turbo 0.75 GHz (avg)
Poor: 32% Great: 54%
SPEED RANK: 282nd / 1182
Gaming 49%
Desktop 57%
Workstation 30%
Effective Speed
Effective CPU Speed
17.2 % 48.7 % Hugely faster effective speed.
Avg. Single Core Mixed Speed
50.6 Pts 83.1 Pts Much faster single-core speed.
Avg. Dual Core Mixed Speed
95.9 Pts 163 Pts Much faster dual-core speed.
Avg. Quad Core Mixed Speed
97 Pts 303 Pts Hugely faster quad-core speed.
Avg. Octa Core Mixed Speed
98.6 Pts 308 Pts Hugely faster octa-core speed.
Avg. Multi Core Mixed Speed
99.6 Pts 312 Pts Hugely faster 64-core speed.
OC Single Core Mixed Speed
54.9 Pts 89.1 Pts Much faster OC single-core speed.
OC Dual Core Mixed Speed
110 Pts 174 Pts Much faster OC dual-core speed.
OC Quad Core Mixed Speed
110 Pts 338 Pts Hugely faster OC quad-core speed.
OC Octa Core Mixed Speed
111 Pts 338 Pts Hugely faster OC octa-core speed.
OC Multi Core Mixed Speed
110 Pts 340 Pts Hugely faster OC 64-core speed.
Market Share
Based on 19,555,385 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.22 % 0.57 % Hugely higher market share.
Value For Money
30.6 % 65.6 % Hugely better value.
User Rating
UBM User Rating
58 % 68 % More popular.
Price (score)
$34 Much cheaper.
139 Months 103 Months More recent.
Thermal Design Power (TDP)
130 Watts 95 Watts More energy efficient.
CPU Processing Cores
2 cores 4 cores Hugely higher core count.
CPU Processing Threads
2 threads 4 threads Hugely higher thread count.
Manufacturing process
45 nm 32 nm Newer manufacturing.
Base Clock
Base Clock Speed
3 GHz 3.1 GHz +3%
Turbo Clock
Turbo Clock Speed
3 GHz 3.4 GHz Slightly faster turbo frequency.
CPU Architecture
Core Sandy Bridge
Motherboard Socket
LGA775 LGA1155
Integrated Graphics
None HD 2000
Launch Date
Launch Date
Q1'08 Q1'11
6 MB L2 6 MB SmartCache
45 nm 32 nm
Recommended Price
Recommended Customer Price
$149.00 - $179.00 $178.00
Bus Speed
Bus Speed
1333 MHz FSB 5 GT/s DMI
Turbo Boost Tech
Intel® Turbo Boost Technology
No 2.0
AES New Instructions
Intel® AES New Instructions
No Yes

More specs » More specs »

The Intel Core 2 Duo E8400 is amongst the fastest of the Core 2 Duo range of now nearly ten year old CPUs. The E8400 is included in our group tests simply as a reference point due to its huge success back in its day. Running at a clock speed of 3.0 GHz the E8400 has an effective speed of 52 which is 85% slower than its modern day counterparts. The relative lack of performance is especially noticeable in the area of multi-core processing as a consequence of the E8400's relatively few two cores. Anyone considering an upgrade needn't hesitate as modern CPUs are not only orders of magnitude faster but also considerably more energy efficient and feature packed. [Oct '14 CPUPro]


Pros: Brilliant value for money. Cons: It's not the 2400k which can be had for just a tiny bit more and offers a lot more flexibility in terms of overclocking. [Apr '12 CPUPro]


Processor Rankings (Price vs Performance) August 2019 CPU Rankings.

We calculate effective speed which measures real world performance for typical gamers and desktop users. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your CPU? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

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