Intel
IntelBX80684I58400
  

4 Cores, 4 Threads
@2.50 GHz Kaby Lake

6 Cores, 6 Threads
@2.8GHz Coffee Lake (2017)

Real World Speed
Performance profile from 56,493 user samples
34,024 User Benchmarks
Best Bench: 74% Base clock 2.5 GHz, turbo 3.1 GHz (avg)
Worst Bench: 50% Base clock 2.5 GHz, turbo 0.8 GHz (avg)
Poor: 50% Great: 74%
SPEED RANK: 172nd / 1117
Gaming
Gaming 66%
Battle cruiser
Desktop
Desktop 65%
Destroyer
Workstation
Workstation 40%
Speed boat
22,469 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 78% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 78% Great: 94%
SPEED RANK: 32nd / 1117
Gaming
Gaming 90%
Aircraft carrier
Desktop
Desktop 87%
Aircraft carrier
Workstation
Workstation 65%
Battle cruiser
Effective Speed
Effective CPU Speed
65.9 % 89.8 % Much faster effective speed.
+36%
SC Mixed
Avg. Single Core Mixed Speed
91.7 Pts 118 Pts Faster single-core speed.
+29%
QC Mixed
Avg. Quad Core Mixed Speed
340 Pts 456 Pts Much faster quad-core speed.
+34%
MC Mixed
Avg. Multi Core Mixed Speed
350 Pts 664 Pts Hugely faster multi-core speed.
+90%
SC Mixed
OC Single Core Mixed Speed
106 Pts 123 Pts Faster OC single-core speed.
+16%
QC Mixed
OC Quad Core Mixed Speed
384 Pts 478 Pts Faster OC quad-core speed.
+24%
MC Mixed
OC Multi Core Mixed Speed
385 Pts 707 Pts Hugely faster OC multi-core speed.
+84%
Market Share
Based on 9,846,660 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.11 % 1.57 % Much higher market share.
+41%
User Rating
UBM User Rating
63 % 106 % Much more popular.
+68%
Age
Newest
18 Months 9 Months Much more recent.
+50%
SC Int
Single Core Integer Speed
102 Pts 118 Pts Faster single-core int speed.
+16%
SC Float
Single Core Floating Point Speed
111 Pts 128 Pts Faster single-core fp speed.
+15%
QC Int
Quad Core Integer Speed
370 Pts 462 Pts Faster quad-core int speed.
+25%
QC Float
Quad Core Floating Point Speed
401 Pts 500 Pts Faster quad-core fp speed.
+25%
MC Int
Multi Core Integer Speed
371 Pts 681 Pts Hugely faster multi-core int speed.
+84%
MC Float
Multi Core Floating Point Speed
400 Pts 740 Pts Hugely faster multi-core fp speed.
+85%
Launch Date
Launch Date
Q1'17 Q4'17
Cache
Cache
6 MB 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.1/4.2, AVX2
Memory Types
Memory Types
DDR4-2400, LPDDR3-2133, DDR3L-1600 DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 630 Intel® UHD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
350.00 MHz 350 MHz
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.00 GHz 1.05 GHz
Package Size
Package Size
42mm x 28mm 37.5mm x 37.5mm
TSX-NI
Intel® TSX-NI
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 »
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best buy for a laptop, performance [Jun '18 ViceCity]

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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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Processor Rankings (Price vs Performance) July 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.
  • 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.

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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 i7-8700K $320Nvidia GTX 1070 $413Samsung 850 Evo 250GB $100
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $289Samsung 850 Evo 500GB $120
Intel Core i7-7700K $300AMD RX 480 $280Samsung 850 Pro 256GB $125
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $176SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $945SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $58HyperX Fury DDR4 2133 C14 2x8GB $219SanDisk Ultra Fit 32GB $12
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