IntelBX80684I58400
IntelBX80684I99900KS
Real World Speed
Performance profile from 140,305 user samples
138,965 User Benchmarks
Best Bench: 84% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 72% Base clock 2.8 GHz, turbo 0.8 GHz (avg)
Poor: 72% Great: 84%
SPEED RANK: 65th / 1206
Gaming
Gaming 80%
Battleship
Desktop
Desktop 80%
Aircraft carrier
Workstation
Workstation 56%
Gunboat
1,340 User Benchmarks
Best Bench: 112% Base clock 4 GHz, turbo 5.25 GHz (avg)
Worst Bench: 100% Base clock 4 GHz, turbo 1.4 GHz (avg)
Poor: 100% Great: 112%
SPEED RANK: 1st / 1206
Gaming
Gaming 106%
UFO
Desktop
Desktop 106%
UFO
Workstation
Workstation 107%
UFO
Effective Speed
Effective CPU Speed
79.6 % 106 % Much faster effective speed.
+33%
1-Core
Avg. Single Core Mixed Speed
117 Pts 153 Pts Much faster single-core speed.
+31%
2-Core
Avg. Dual Core Mixed Speed
230 Pts 303 Pts Much faster dual-core speed.
+32%
4-Core
Avg. Quad Core Mixed Speed
449 Pts 602 Pts Much faster quad-core speed.
+34%
8-Core
Avg. Octa Core Mixed Speed
636 Pts 1128 Pts Much faster octa-core speed.
+77%
1-Core
OC Single Core Mixed Speed
122 Pts 160 Pts Much faster OC single-core speed.
+31%
2-Core
OC Dual Core Mixed Speed
242 Pts 320 Pts Much faster OC dual-core speed.
+32%
4-Core
OC Quad Core Mixed Speed
477 Pts 635 Pts Much faster OC quad-core speed.
+33%
8-Core
OC Octa Core Mixed Speed
692 Pts 1242 Pts Much faster OC octa-core speed.
+79%
Market Share
Based on 22,715,049 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.95 % Hugely higher market share.
+332%
0.22 %
Value
Value For Money
87.2 % +3% 84.8 %
User Rating
UBM User Rating
78 % Much more popular.
+34%
58 %
Price
Price (score)
$200 Much cheaper.
+68%
$630
Age
Newest
26 Months 2+ Months Hugely more recent.
+92%
64-Core
OC Multi Core Mixed Speed
695 Pts 1728 Pts Hugely faster OC 64-core speed.
+149%
64-Core
Avg. Multi Core Mixed Speed
643 Pts 1606 Pts Hugely faster 64-core speed.
+150%
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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]

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The current gaming king, this 8 core 16 thread monster comes with 4.0GHz base clock with 5.0GHz all core boost but with TDP of 127W. Intel has matured the Skylake 14nm silicon enough to allow even higher clock, better stability and higher IPC, this CPU is refresh of the last-year i9-9900K which is the previous gaming king. This CPU can be overclocked to 5.2GHz all core but beefy air cooler is necessary to keep the CPU from overheating or open loop liquid cooling if you want to keep the CPU as warm as necessary. [Dec '19 ColdSpy]

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Processor Rankings (Price vs Performance) December 2019 CPU Rankings.

We calculate effective speed which measures real world performance for typical gamers and desktop 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.

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 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.
  • - Share your opinion by voting.

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CPUGPUSSD
Intel Core i5-9400F $145Nvidia GTX 1660S (Super) $260Crucial MX500 250GB $44
Intel Core i5-9600K $200AMD RX 590 $180Samsung 850 Evo 120GB $58
Intel Core i7-9700K $360Nvidia GTX 1650S (Super) $160Samsung 850 Pro 512GB $230
HDDRAMUSB
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $65SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $38Corsair Vengeance LPX DDR4 3000 C15 2x8GB $63SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $613SanDisk Extreme 16GB $24
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