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

Real World Speed
Performance profile from 54,268 user samples
51,684 User Benchmarks
Best Bench: 49% Base clock 3 GHz, turbo 3 GHz (avg)
Worst Bench: 34% Base clock 3 GHz, turbo 2.8 GHz (avg)
Poor: 34% Great: 49%
SPEED RANK: 843rd / 1251
Gaming 44%
Speed boat
Desktop 51%
Workstation 30%
2,584 User Benchmarks
Best Bench: 50% Base clock 2.9 GHz
Worst Bench: 29% Base clock 2.9 GHz, turbo 2.9 GHz (avg)
Poor: 29% Great: 50%
SPEED RANK: 905th / 1251
Gaming 41%
Speed boat
Desktop 48%
Workstation 28%
Effective Speed
Effective CPU Speed
44 % Slightly faster effective speed.
41.3 %
Avg. Memory Latency
72 Pts Slightly lower memory latency.
68.1 Pts
Avg. Single Core Mixed Speed
50.1 Pts Slightly faster single-core speed.
45.7 Pts
Avg. Dual Core Mixed Speed
94.9 Pts Faster dual-core speed.
85.8 Pts
Avg. Quad Core Mixed Speed
96.2 Pts Faster quad-core speed.
87.4 Pts
Avg. Octa Core Mixed Speed
97.7 Pts Faster octa-core speed.
88.6 Pts
OC Memory Latency
79.6 Pts 84.1 Pts Slightly lower OC memory latency.
OC Single Core Mixed Speed
54.7 Pts Slightly faster OC single-core speed.
50.8 Pts
OC Dual Core Mixed Speed
109 Pts Slightly faster OC dual-core speed.
101 Pts
OC Quad Core Mixed Speed
109 Pts Slightly faster OC quad-core speed.
101 Pts
OC Octa Core Mixed Speed
109 Pts Slightly faster OC octa-core speed.
101 Pts
Market Share
Based on 30,113,948 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.19 % Insanely higher market share.
0.01 %
User Rating
UBM User Rating
59 % More popular.
51 %
150 Months 79+ Months Much more recent.
OC Multi Core Mixed Speed
109 Pts Slightly faster OC 64-core speed.
101 Pts
Avg. Multi Core Mixed Speed
97.8 Pts Slightly faster 64-core speed.
89.2 Pts

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) July 2020 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.
  • - 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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