Real World Speed
Performance profile from 14,806 user samples
14,806 User Benchmarks
Best Bench: 96% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 83% Base clock 2.8 GHz, turbo 1.4 GHz (avg)
Poor: 83% Great: 96%
SPEED RANK: 31st / 1110
Gaming
Gaming 91%
Nuclear submarine
Desktop
Desktop 88%
Aircraft carrier
Workstation
Workstation 66%
Battle cruiser
Effective Speed
Effective CPU Speed
91.1 % 93.1 % +2%
SC Mixed
Avg. Single Core Mixed Speed
119 Pts +1% 118 Pts
QC Mixed
Avg. Quad Core Mixed Speed
463 Pts +3% 452 Pts
MC Mixed
Avg. Multi Core Mixed Speed
673 Pts 948 Pts Much faster multi-core speed.
+41%
SC Mixed
OC Single Core Mixed Speed
125 Pts 131 Pts +5%
QC Mixed
OC Quad Core Mixed Speed
486 Pts 512 Pts Slightly faster OC quad-core speed.
+5%
MC Mixed
OC Multi Core Mixed Speed
718 Pts 1,072 Pts Much faster OC multi-core speed.
+49%
Market Share
Based on 9,332,833 CPUs tested.
User Rating
UBM User Rating
104 % 116 % Slightly more popular.
+11%
Market Share
Market Share (trailing 30 days)
1.15 % 1.43 % Higher market share.
+25%
Price
Price (score)
$179 Cheaper.
+25%
224 USD
Value
Value For Money
109 % Slightly better value.
+6%
103 %
TDP
Thermal Design Power (TDP)
65 Watts Much more energy efficient.
+30%
84.6 Watts
Cores
CPU Processing Cores
6 cores 6.44 cores Slightly higher core count.
+7%
Threads
CPU Processing Threads
6 threads 11.6 threads Hugely higher thread count.
+93%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
2.8 GHz 3.46 GHz Faster base frequency.
+23%
Turbo Clock
Turbo Clock Speed
4 GHz 4.07 GHz +2%
SC Int
Single Core Integer Speed
122 Pts 127 Pts +4%
SC Float
Single Core Floating Point Speed
129 Pts 135 Pts +4%
QC Int
Quad Core Integer Speed
473 Pts 497 Pts +5%
QC Float
Quad Core Floating Point Speed
501 Pts 531 Pts Slightly faster quad-core fp speed.
+6%
MC Int
Multi Core Integer Speed
699 Pts 1,028 Pts Much faster multi-core int speed.
+47%
MC Float
Multi Core Floating Point Speed
743 Pts 1,097 Pts Much faster multi-core fp speed.
+48%
Age
Newest
8 Months Much more recent.
+58%
12.7 Months
Series
CPU Architecture
Coffee Lake (2017)   —
Socket
Motherboard Socket
FCLGA1151   —
Graphics
Integrated Graphics
UHD 630   —
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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

Processor Rankings (Price vs Performance) June 2018 CPU Rankings.

We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. 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.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance and price.
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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - 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 highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

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The Best.
CPUGPUSSD
AMD Ryzen 5 1600 $170Nvidia GTX 1070 $420Samsung 850 Evo 250GB $104
Intel Core i7-8700K $320Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $138
Intel Core i5-8600K $238AMD RX 480 $280Samsung 850 Pro 256GB $121
HDDRAMUSB
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $177SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $911SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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