Intel
IntelBX80684I58400
  

2 Cores, 4 Threads @2.60 GHz, Kaby Lake.
Release date ≈ Q1 2017.

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

Real World Speed
Performance profile from 96,008 user samples
8,028 User Benchmarks
Best Bench: 62% Base clock 2.7 GHz, turbo 3.5 GHz (avg)
Worst Bench: 35% Base clock 2.7 GHz, turbo 0.4 GHz (avg)
Poor: 35% Great: 62%
SPEED RANK: 326th / 1159
Gaming
Gaming 52%
Yacht
Desktop
Desktop 59%
Gunboat
Workstation
Workstation 31%
Sail boat
87,980 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 81% Base clock 2.8 GHz, turbo 1.2 GHz (avg)
Poor: 81% Great: 94%
SPEED RANK: 54th / 1159
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
52.5 % 88.9 % Much faster effective speed.
+69%
SC Mixed
Avg. Single Core Mixed Speed
89.9 Pts 117 Pts Much faster single-core speed.
+30%
QC Mixed
Avg. Quad Core Mixed Speed
244 Pts 451 Pts Hugely faster quad-core speed.
+85%
MC Mixed
Avg. Multi Core Mixed Speed
248 Pts 650 Pts Hugely faster multi-core speed.
+162%
SC Mixed
OC Single Core Mixed Speed
107 Pts 122 Pts Slightly faster OC single-core speed.
+14%
QC Mixed
OC Quad Core Mixed Speed
289 Pts 478 Pts Much faster OC quad-core speed.
+65%
MC Mixed
OC Multi Core Mixed Speed
291 Pts 700 Pts Hugely faster OC multi-core speed.
+141%
Market Share
Based on 17,684,631 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.09 % 1.37 % Insanely higher market share.
+1,422%
User Rating
UBM User Rating
58 % 115 % Hugely more popular.
+98%
Age
Newest
29+ Months 20 Months Much more recent.
+31%
SC Int
Single Core Integer Speed
104 Pts 118 Pts Slightly faster single-core int speed.
+13%
SC Float
Single Core Floating Point Speed
111 Pts 128 Pts Faster single-core fp speed.
+15%
QC Int
Quad Core Integer Speed
264 Pts 460 Pts Much faster quad-core int speed.
+74%
QC Float
Quad Core Floating Point Speed
309 Pts 500 Pts Much faster quad-core fp speed.
+62%
MC Int
Multi Core Integer Speed
265 Pts 666 Pts Hugely faster multi-core int speed.
+151%
MC Float
Multi Core Floating Point Speed
308 Pts 738 Pts Hugely faster multi-core fp speed.
+140%
Launch Date
Launch Date
Q1'17 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
$281.00 N/A
Bus Speed
Bus Speed
4 GT/s OPI 8 GT/s DMI3
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR4-2133, LPDDR3-1866, DDR3L-1600 DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 620 Intel® UHD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
300.00 MHz 350 MHz
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.10 GHz 1.05 GHz
Graphics Video Max Memory
Graphics Video Max Memory
32 GB 64 GB
Package Size
Package Size
42mm X 24mm 37.5mm x 37.5mm
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
TSX-NI
Intel® TSX-NI
Yes No
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
PCI Express Configurations
PCI Express Configurations ‡
1x4, 2x2, 1x2+2x1 and 4x1 Up to 1x16 or 2x8 or 1x8+2x4
Max # of PCI Express Lanes
Max # of PCI Express Lanes
12 16

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) June 2019 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 $365Nvidia GTX 1070 $390Samsung 850 Evo 250GB $87
AMD Ryzen 5 2600 $139Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $100
AMD Ryzen 7 2700X $280Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 64GB $128
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $639SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback