IntelBX80684I58400
Intel

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

4 Cores, 4 Threads @3.1 GHz, Ivy Bridge.
Release date ≤ Q1 2014.

Real World Speed
Performance profile from 29,404 user samples
27,197 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 81% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 81% Great: 94%
SPEED RANK: 31st / 1121
Gaming
Gaming 90%
Aircraft carrier
Desktop
Desktop 87%
Aircraft carrier
Workstation
Workstation 65%
Battle cruiser
2,207 User Benchmarks
Best Bench: 65% Base clock 3.7 GHz, turbo 4.15 GHz (avg)
Worst Bench: 48% Base clock 3.1 GHz
Poor: 48% Great: 65%
SPEED RANK: 222nd / 1121
Gaming
Gaming 60%
Destroyer
Desktop
Desktop 59%
Gunboat
Workstation
Workstation 37%
Jet ski
Effective Speed
Effective CPU Speed
89.8 % Much faster effective speed.
+49%
60.2 %
SC Mixed
Avg. Single Core Mixed Speed
118 Pts Much faster single-core speed.
+39%
84.6 Pts
QC Mixed
Avg. Quad Core Mixed Speed
456 Pts Much faster quad-core speed.
+48%
309 Pts
MC Mixed
Avg. Multi Core Mixed Speed
661 Pts Hugely faster multi-core speed.
+107%
319 Pts
SC Mixed
OC Single Core Mixed Speed
123 Pts Much faster OC single-core speed.
+36%
90.6 Pts
QC Mixed
OC Quad Core Mixed Speed
477 Pts Much faster OC quad-core speed.
+40%
341 Pts
MC Mixed
OC Multi Core Mixed Speed
704 Pts Hugely faster OC multi-core speed.
+105%
343 Pts
Market Share
Based on 10,269,902 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.56 % Insanely higher market share.
+3,800%
0.04 %
Value
Value For Money
108 % Much better value.
+77%
60.9 %
User Rating
UBM User Rating
113 % Hugely more popular.
+109%
54 %
Price
Price (score)
$180 Much cheaper.
+36%
$283
Age
Newest
10 Months Hugely more recent.
+82%
55+ Months
SC Int
Single Core Integer Speed
118 Pts Much faster single-core int speed.
+32%
89.3 Pts
SC Float
Single Core Floating Point Speed
128 Pts Much faster single-core fp speed.
+40%
91.7 Pts
QC Int
Quad Core Integer Speed
461 Pts Much faster quad-core int speed.
+36%
339 Pts
QC Float
Quad Core Floating Point Speed
499 Pts Much faster quad-core fp speed.
+43%
348 Pts
MC Int
Multi Core Integer Speed
680 Pts Hugely faster multi-core int speed.
+101%
339 Pts
MC Float
Multi Core Floating Point Speed
739 Pts Hugely faster multi-core fp speed.
+112%
348 Pts
Launch Date
Launch Date
Q4'17 Q3'13
Cache
Cache
9 MB 6 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
N/A $182.00 - $187.00
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) 2011D
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-2666 DDR3 1333/1600
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 2500
Graphics Base Frequency
Graphics Base Frequency
350 MHz 650 MHz
PCI Express Configurations
PCI Express Configurations ‡
Up to 1x16 or 2x8 or 1x8+2x4 up to 1x16, 2x8, 1x8 & 2x4

More specs » More specs »
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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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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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