Intel
IntelBX80684I58400
  

4 Cores, 4 Threads @3.3 GHz, Sandy Bridge.
Release date ≤ Q4 2013.

6 Cores, 6 Threads @2.8GHz, Coffee Lake.
Release date: Q4 2017.

Real World Speed
Performance profile from 335,779 user samples
74,499 User Benchmarks
Best Bench: 77% Base clock 3.3 GHz, turbo 3.8 GHz (avg)
Worst Bench: 60% Base clock 3.3 GHz, turbo 3.7 GHz (avg)
Poor: 60% Great: 77%
SPEED RANK: 305th / 1316
Gaming
Gaming 71%
Battleship
Desktop
Desktop 75%
Battleship
Workstation
Workstation 53%
Yacht
261,280 User Benchmarks
Best Bench: 90% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 72% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 72% Great: 90%
SPEED RANK: 96th / 1316
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 70%
Battle cruiser
Effective Speed
Effective CPU Speed
71 % 84.6 % Faster effective speed.
+19%
Memory
Avg. Memory Latency
85.9 Pts 88.3 Pts +3%
1-Core
Avg. Single Core Mixed Speed
90.1 Pts 114 Pts Faster single-core speed.
+27%
2-Core
Avg. Dual Core Mixed Speed
175 Pts 226 Pts Faster dual-core speed.
+29%
4-Core
Avg. Quad Core Mixed Speed
325 Pts 439 Pts Much faster quad-core speed.
+35%
8-Core
Avg. Octa Core Mixed Speed
329 Pts 625 Pts Hugely faster octa-core speed.
+90%
Memory
OC Memory Latency
92.6 Pts 94.7 Pts +2%
1-Core
OC Single Core Mixed Speed
97.1 Pts 121 Pts Faster OC single-core speed.
+25%
2-Core
OC Dual Core Mixed Speed
189 Pts 241 Pts Faster OC dual-core speed.
+28%
4-Core
OC Quad Core Mixed Speed
360 Pts 473 Pts Much faster OC quad-core speed.
+31%
8-Core
OC Octa Core Mixed Speed
363 Pts 687 Pts Hugely faster OC octa-core speed.
+89%
Market Share
Based on 44,945,033 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.17 % 0.7 % Hugely higher market share.
+312%
User Rating
UBM User Rating
63 % +3% 61 %
Age
Newest
91+ Months 45 Months Much more recent.
+51%
64-Core
OC Multi Core Mixed Speed
362 Pts 693 Pts Hugely faster OC 64-core speed.
+91%
64-Core
Avg. Multi Core Mixed Speed
330 Pts 629 Pts Hugely faster 64-core speed.
+91%
Launch Date
Launch Date
Q1'11 Q4'17
Cache
Cache
6 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX SSE4.1/4.2, AVX2
Lithography
Lithography
32 nm 14 nm
Max Turbo Frequency
Max Turbo Frequency
3.7 GHz 4.00 GHz
Bus Speed
Bus Speed
5 GT/s DMI 8 GT/s DMI3
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR3 1066/1333 DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 2000 Intel® UHD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
850 MHz 350 MHz
# of Displays Supported
# of Displays Supported ‡
2 3
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.1 GHz 1.05 GHz
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
PCI Express Revision
PCI Express Revision
2.0 3.0

More specs » More specs »
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This had the best price point for a long time and worked well for that money [Dec '18 BurntTech]

MORE DETAILS

The i5-8400 is a competitively priced hex-core processor from Intel’s 8th generation of Core processors (Coffee Lake). Along with the release of the unlocked i5-8600K, this is the first time that six-core processors have featured in the i5 line-up. Like the other Coffee Lake processors, the i5-8400 is based upon an improved version of Intel’s 14nm architecture which featured in both Skylake and Kaby Lake. Early benchmarks reveal that for average quad core usage (most games employ a maximum of four cores) the i5-8400 performs way above its pay grade. It achieves quad core mixed speeds close to Intel’s outgoing 2017 flagship the $300, quad-core, 8 thread i7-7700k, which to date has been a strong favourite for high-end gaming setups. On paper, the i5-8400 has a base clock of 2.8 GHz (Intel are significantly downplaying the performance of this SKU by giving it a relatively low nominal base clock), an all core boost of 3.8 GHz (this is the effective base clock figure that counts) and a single core boost of 4 GHz. This compares reasonably well to the i5-8600K which has a base clock of 3.6 GHz, all core boost of 4.1 GHz and a single core boost of 4.3 GHz. The i5-8400 also features 9MB of L3 cache and an energy-thrifty TDP of 65W. Priced at under $190, the i5-8400 offers fantastic value for money. Unfortunately, like the other Coffee Lake processors, the i5-8400 will require a new 300 series motherboard, and at the time of writing, the only available version is Intel’s high-end Z370 which isn't an ideal pairing for the i5-8400. The Z series motherboards are designed to cater for the unlocked and overclockable "K" SKUs. Cheaper 300 series motherboards will be available in 2018 at which time the 8400 will offer even better value for money. [Oct '17 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) July 2021 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]

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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.
  • - SkillBench (space shooter) tests user input accuracy.
  • - Reports are generated and presented on userbenchmark.com.
  • - 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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HDDRAMUSB
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