Real World Speed
Performance profile from 2,787 user samples
2,787 User Benchmarks
Best Bench: 96% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 86% Base clock 2.8 GHz, turbo 1.1 GHz (avg)
Poor: 86% Great: 96%
SPEED RANK: 24th / 981
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 68%
Battle cruiser
Effective Speed
Effective CPU Speed
92.3 % Slightly faster effective speed.
+7%
86 % -7%
SC Mixed
Avg. Single Core Mixed Speed
120 Pts +2% 118 Pts -2%
QC Mixed
Avg. Quad Core Mixed Speed
469 Pts Slightly faster quad-core speed.
+11%
422 Pts -11%
MC Mixed
Avg. Multi Core Mixed Speed
688 Pts -0% 689 Pts +0%
SC Mixed
OC Single Core Mixed Speed
126 Pts -5% 132 Pts Slightly faster OC single-core speed.
+5%
QC Mixed
OC Quad Core Mixed Speed
489 Pts -1% 493 Pts +1%
MC Mixed
OC Multi Core Mixed Speed
725 Pts -8% 786 Pts Slightly faster OC multi-core speed.
+8%
Market Share
Based on 6,894,829 CPUs tested.
User Rating
UBM User Rating
68 % -75% 119 % Much more popular.
+75%
Market Share
Market Share (trailing 30 days)
0.61 % -150% 1.52 % Hugely higher market share.
+150%
Price
Price (score)
$200 Cheaper.
+20%
239 USD -20%
Value
Value For Money
106 % Slightly better value.
+12%
94.9 % -12%
TDP
Thermal Design Power (TDP)
65 Watts More energy efficient.
+25%
81.2 Watts -25%
Cores
CPU Processing Cores
6 cores Higher core count.
+29%
4.67 cores -29%
Threads
CPU Processing Threads
6 threads -41% 8.44 threads Much higher thread count.
+41%
Lithography
Manufacturing process
14 nm Slightly newer manufacturing.
+6%
14.9 nm -6%
Base Clock
Base Clock Speed
2.8 GHz -30% 3.64 GHz Much faster base frequency.
+30%
Turbo Clock
Turbo Clock Speed
4 GHz 0% 4 GHz 0%
SC Int
Single Core Integer Speed
122 Pts -6% 129 Pts Slightly faster single-core int speed.
+6%
SC Float
Single Core Floating Point Speed
129 Pts -5% 136 Pts Slightly faster single-core fp speed.
+5%
QC Int
Quad Core Integer Speed
476 Pts -0% 477 Pts +0%
QC Float
Quad Core Floating Point Speed
504 Pts -1% 509 Pts +1%
MC Int
Multi Core Integer Speed
707 Pts -6% 751 Pts Slightly faster multi-core int speed.
+6%
MC Float
Multi Core Floating Point Speed
747 Pts -8% 806 Pts Slightly faster multi-core fp speed.
+8%
Age
Newest
3 Months Hugely more recent.
+511%
18.3 Months -511%
Series
CPU Architecture
Coffee Lake (2017)   —
Socket
Motherboard Socket
FCLGA1151   —
Graphics
Integrated Graphics
UHD 630   —
ADVERTISEMENT

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) January 2018 CPU Rankings.

Welcome to our desktop CPU comparison. We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by price to yield a value for money rating which is geared towards gamers. Calculated values don't always paint the whole picture so we check them against hundreds of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top CPUs. [CPUPro]

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

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-7700K $280Nvidia GTX 1070 $430Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $290Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $65
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback