IntelBX80662I36100
IntelBX80684I58400

2 Cores, 4 Threads @3.7GHz, Skylake.
Release date: Q4 2015.

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

Real World Speed
Performance profile from 81,256 user samples
40,863 User Benchmarks
Best Bench: 66% Base clock 2.8 GHz, turbo 3.7 GHz (avg)
Worst Bench: 46% Base clock 3.7 GHz, turbo 0.8 GHz (avg)
Poor: 46% Great: 66%
SPEED RANK: 232nd / 1132
Gaming
Gaming 60%
Destroyer
Desktop
Desktop 67%
Battle cruiser
Workstation
Workstation 36%
Jet ski
40,393 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 80% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Poor: 80% Great: 94%
SPEED RANK: 34th / 1132
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 65%
Destroyer
Effective Speed
Effective CPU Speed
60.1 % 89.4 % Much faster effective speed.
+49%
SC Mixed
Avg. Single Core Mixed Speed
104 Pts 117 Pts Slightly faster single-core speed.
+12%
QC Mixed
Avg. Quad Core Mixed Speed
278 Pts 454 Pts Much faster quad-core speed.
+63%
MC Mixed
Avg. Multi Core Mixed Speed
286 Pts 657 Pts Hugely faster multi-core speed.
+130%
SC Mixed
OC Single Core Mixed Speed
114 Pts 123 Pts Slightly faster OC single-core speed.
+8%
QC Mixed
OC Quad Core Mixed Speed
310 Pts 477 Pts Much faster OC quad-core speed.
+54%
MC Mixed
OC Multi Core Mixed Speed
312 Pts 705 Pts Hugely faster OC multi-core speed.
+126%
Market Share
Based on 11,607,141 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.41 % 1.32 % Hugely higher market share.
+222%
Value
Value For Money
83.8 % 102 % Better value.
+22%
User Rating
UBM User Rating
62 % 110 % Much more popular.
+77%
Price
Price (score)
$120 Much cheaper.
+41%
$205
Age
Newest
36 Months 12 Months Much more recent.
+67%
TDP
Thermal Design Power (TDP)
47 Watts More energy efficient.
+28%
65 Watts
Cores
CPU Processing Cores
2 cores 6 cores Hugely higher core count.
+200%
Threads
CPU Processing Threads
4 threads 6 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.7 GHz Much faster base frequency.
+32%
2.8 GHz
Turbo Clock
Turbo Clock Speed
3.7 GHz 4 GHz Slightly faster turbo frequency.
+8%
SC Int
Single Core Integer Speed
111 Pts 119 Pts Slightly faster single-core int speed.
+7%
SC Float
Single Core Floating Point Speed
118 Pts 128 Pts Slightly faster single-core fp speed.
+8%
QC Int
Quad Core Integer Speed
287 Pts 460 Pts Much faster quad-core int speed.
+60%
QC Float
Quad Core Floating Point Speed
328 Pts 499 Pts Much faster quad-core fp speed.
+52%
MC Int
Multi Core Integer Speed
287 Pts 675 Pts Hugely faster multi-core int speed.
+135%
MC Float
Multi Core Floating Point Speed
328 Pts 740 Pts Hugely faster multi-core fp speed.
+126%
Series
CPU Architecture
Skylake Coffee Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
HD 530 UHD 630
Launch Date
Launch Date
Q3'15 Q4'17
Cache
Cache
3 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Embedded Options Available
Embedded Options Available
Yes No
Recommended Price
Recommended Customer Price
$117.00 N/A
Memory Types
Memory Types
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR4-2666
ECC Memory Supported
ECC Memory Supported ‡
Yes No
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 Intel® UHD Graphics 630
Turbo Boost Tech
Intel® Turbo Boost Technology
No 2.0
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
PCI Express Configurations
PCI Express Configurations ‡
Up to 1x16, 2x8, 1x8+2x4 Up to 1x16 or 2x8 or 1x8+2x4

More specs » More specs »
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) October 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]

ADVERTISEMENT

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.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-8700K $370Nvidia GTX 1070 $350Samsung 850 Evo 250GB $100
AMD Ryzen 5 1600 $155Nvidia GTX 1060-6GB $249Samsung 850 Evo 500GB $98
Intel Core i7-7700K $355AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 64GB $42
Seagate Barracuda 3TB (2016) $80Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $157SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback