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

Real World Speed
Performance profile from 68,752 user samples
212 User Benchmarks
Best Bench: 40% Base clock 2.75 GHz
Worst Bench: 10% Base clock 2.4 GHz
Poor: 10% Great: 40%
SPEED RANK: 1332nd / 1369
Gaming 23%
Desktop 26%
Workstation 15%
Tree trunk
68,540 User Benchmarks
Best Bench: 47% Base clock 3 GHz, turbo 2.95 GHz (avg)
Worst Bench: 24% Base clock 3 GHz, turbo 2.7 GHz (avg)
Poor: 24% Great: 47%
SPEED RANK: 986th / 1369
Gaming 40%
Speed boat
Desktop 46%
Workstation 27%
Effective Speed
Effective CPU Speed
23.4 % 40.3 % Much faster effective speed.
Avg. Memory Latency
43.2 Pts 67.9 Pts Much lower memory latency.
Avg. Single Core Speed
21 Pts 41.2 Pts Hugely faster single-core speed.
Avg. Dual Core Speed
21.8 Pts 73.8 Pts Hugely faster dual-core speed.
Avg. Quad Core Speed
23 Pts 76.9 Pts Hugely faster quad-core speed.
Avg. Octa Core Speed
23.5 Pts 78.1 Pts Hugely faster octa-core speed.
OC Memory Latency
79.4 Pts +1% 78.9 Pts
OC Single Core Speed
28.5 Pts 48.1 Pts Much faster OC single-core speed.
OC Dual Core Speed
30.3 Pts 95.5 Pts Hugely faster OC dual-core speed.
OC Quad Core Speed
30.4 Pts 95.4 Pts Hugely faster OC quad-core speed.
OC Octa Core Speed
30.4 Pts 95.4 Pts Hugely faster OC octa-core speed.
Market Share
Based on 57,261,237 CPUs tested.
Market Share
Market Share (trailing 30 days)
0 % 0.03 % Insanely higher market share.
User Rating
UBM User Rating
49 % 53 % Slightly more popular.
108+ Months Much more recent.
179 Months
OC Multi Core Speed
30.4 Pts 95.4 Pts Hugely faster OC 64-core speed.
Avg. Multi Core Speed
24.7 Pts 78 Pts Hugely faster 64-core speed.

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]


Processor Rankings (Price vs Performance) December 2022 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. 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.

UserBenchmark of the month

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.
  • - SkillBench (space shooter) tests user input accuracy.
  • - 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.

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