IntelBX80684I58400
AMDYD3400C5FHBOX

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

Real World Speed
Performance profile from 328,812 user samples
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
67,532 User Benchmarks
Best Bench: 81% Base clock 3.7 GHz, turbo 4.15 GHz (avg)
Worst Bench: 60% Base clock 3.7 GHz, turbo 0.5 GHz (avg)
Poor: 60% Great: 81%
SPEED RANK: 291st / 1316
Gaming
Gaming 72%
Battleship
Desktop
Desktop 75%
Battleship
Workstation
Workstation 62%
Destroyer
Effective Speed
Effective CPU Speed
84.6 % Faster effective speed.
+18%
71.7 %
Memory
Avg. Memory Latency
88.3 Pts Lower memory latency.
+22%
72.6 Pts
1-Core
Avg. Single Core Mixed Speed
114 Pts +3% 111 Pts
2-Core
Avg. Dual Core Mixed Speed
226 Pts Slightly faster dual-core speed.
+6%
213 Pts
4-Core
Avg. Quad Core Mixed Speed
439 Pts Faster quad-core speed.
+15%
381 Pts
8-Core
Avg. Octa Core Mixed Speed
625 Pts +2% 615 Pts
Memory
OC Memory Latency
94.7 Pts Lower OC memory latency.
+15%
82.7 Pts
1-Core
OC Single Core Mixed Speed
121 Pts 122 Pts +1%
2-Core
OC Dual Core Mixed Speed
241 Pts +1% 239 Pts
4-Core
OC Quad Core Mixed Speed
473 Pts +3% 460 Pts
8-Core
OC Octa Core Mixed Speed
687 Pts +1% 682 Pts
Market Share
Based on 44,945,486 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.7 % Much higher market share.
+40%
0.5 %
Value
Value For Money
96.6 % Better value.
+14%
84.9 %
User Rating
UBM User Rating
61 % 80 % Much more popular.
+31%
Price
Price (score)
$172 $150 Cheaper.
+13%
Age
Newest
45 Months 25+ Months Much more recent.
+44%
64-Core
OC Multi Core Mixed Speed
693 Pts +2% 682 Pts
64-Core
Avg. Multi Core Mixed Speed
629 Pts +1% 622 Pts
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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

Little better GPU performance (Vega 11 for Ryzen 5 3400G/2400G compared to Vega 8 for Ryzen 3 3200G/2200G) for slightly more multi thread performance which may be useful for some use cases. [Oct '19 ColdSpy]

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.

 Frequently Asked Questions

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The Best.
CPUGPUSSD
Intel Core i5-11400F $239Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $270Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-10700K $304Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $85SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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