Intel
IntelBX80684I58400
  

2 Cores, 4 Threads @2.70 GHz, Kaby Lake.
Release date ≈ Q3 2016.

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

Real World Speed
Performance profile from 400,343 user samples
129,655 User Benchmarks
Best Bench: 68% Base clock 2.9 GHz, turbo 3.5 GHz (avg)
Worst Bench: 41% Base clock 2.9 GHz, turbo 0.6 GHz (avg)
Poor: 41% Great: 68%
SPEED RANK: 527th / 1316
Gaming
Gaming 59%
Gunboat
Desktop
Desktop 67%
Battle cruiser
Workstation
Workstation 42%
Speed boat
270,688 User Benchmarks
Best Bench: 90% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 75% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 75% Great: 90%
SPEED RANK: 98th / 1316
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 70%
Battle cruiser
Effective Speed
Effective CPU Speed
58.8 % 84.6 % Much faster effective speed.
+44%
Memory
Avg. Memory Latency
78.3 Pts 88.1 Pts Lower memory latency.
+13%
1-Core
Avg. Single Core Mixed Speed
89.9 Pts 115 Pts Faster single-core speed.
+28%
2-Core
Avg. Dual Core Mixed Speed
156 Pts 227 Pts Much faster dual-core speed.
+46%
4-Core
Avg. Quad Core Mixed Speed
229 Pts 440 Pts Hugely faster quad-core speed.
+92%
8-Core
Avg. Octa Core Mixed Speed
231 Pts 623 Pts Hugely faster octa-core speed.
+170%
Memory
OC Memory Latency
91.4 Pts 94.1 Pts +3%
1-Core
OC Single Core Mixed Speed
107 Pts 122 Pts Faster OC single-core speed.
+14%
2-Core
OC Dual Core Mixed Speed
195 Pts 241 Pts Faster OC dual-core speed.
+24%
4-Core
OC Quad Core Mixed Speed
285 Pts 473 Pts Much faster OC quad-core speed.
+66%
8-Core
OC Octa Core Mixed Speed
285 Pts 686 Pts Hugely faster OC octa-core speed.
+141%
Market Share
Based on 44,090,286 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.37 % 0.66 % Much higher market share.
+78%
User Rating
UBM User Rating
55 % 61 % More popular.
+11%
Age
Newest
57+ Months 44 Months More recent.
+23%
64-Core
OC Multi Core Mixed Speed
287 Pts 689 Pts Hugely faster OC 64-core speed.
+140%
64-Core
Avg. Multi Core Mixed Speed
230 Pts 631 Pts Hugely faster 64-core speed.
+174%
Launch Date
Launch Date
Q3'16 Q4'17
Cache
Cache
4 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Recommended Price
Recommended Customer Price
$393.00 N/A
Max Turbo Frequency
Max Turbo Frequency
3.50 GHz 4.00 GHz
Bus Speed
Bus Speed
4 GT/s OPI 8 GT/s DMI3
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR4-2133, LPDDR3-1866, DDR3L-1600 DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 620 Intel® UHD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
300.00 MHz 350 MHz
Graphics Video Max Memory
Graphics Video Max Memory
32 GB 64 GB
Package Size
Package Size
42mm X 24mm 37.5mm x 37.5mm
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
PCI Express Configurations
PCI Express Configurations ‡
1x4, 2x2, 1x2+2x1 and 4x1 Up to 1x16 or 2x8 or 1x8+2x4
Max # of PCI Express Lanes
Max # of PCI Express Lanes
12 16

More specs » More specs »
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Is amazing for everyday work but it is hard to game on my laptop but that is mainly because the only graphics are the integrated ones. [Dec '20 SquirrelMonster]

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) June 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.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
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  • - Explore your best upgrade options with a virtual PC build.
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