IntelBX80684I58400
IntelCM8068403358913

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

6 Cores, 6 Threads @1.70 GHz, Coffee Lake.
Release date ≈ Q2 2018.

Real World Speed
Performance profile from 67,682 user samples
67,374 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 80% Base clock 2.8 GHz, turbo 1.5 GHz (avg)
Poor: 80% Great: 94%
SPEED RANK: 45th / 1146
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 65%
Destroyer
308 User Benchmarks
Best Bench: 76% Base clock 1.7 GHz, turbo 3.05 GHz (avg)
Worst Bench: 68% Base clock 1.7 GHz, turbo 1.7 GHz (avg)
Poor: 68% Great: 76%
SPEED RANK: 125th / 1146
Gaming
Gaming 72%
Battleship
Desktop
Desktop 70%
Battleship
Workstation
Workstation 52%
Yacht
Effective Speed
Effective CPU Speed
89.1 % Faster effective speed.
+23%
72.3 %
SC Mixed
Avg. Single Core Mixed Speed
117 Pts Faster single-core speed.
+22%
95.9 Pts
QC Mixed
Avg. Quad Core Mixed Speed
451 Pts Faster quad-core speed.
+23%
366 Pts
MC Mixed
Avg. Multi Core Mixed Speed
654 Pts Faster multi-core speed.
+25%
524 Pts
SC Mixed
OC Single Core Mixed Speed
122 Pts Faster OC single-core speed.
+21%
101 Pts
QC Mixed
OC Quad Core Mixed Speed
477 Pts Faster OC quad-core speed.
+24%
384 Pts
MC Mixed
OC Multi Core Mixed Speed
698 Pts Faster OC multi-core speed.
+26%
554 Pts
Market Share
Based on 14,839,181 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.49 % Insanely higher market share.
+14,800%
0.01 %
Value
Value For Money
106 % Better value.
+22%
86.9 %
User Rating
UBM User Rating
111 % Hugely more popular.
+106%
54 %
Price
Price (score)
$185 $179 +3%
Age
Newest
16 Months 10+ Months Much more recent.
+38%
SC Int
Single Core Integer Speed
118 Pts Faster single-core int speed.
+21%
97.6 Pts
SC Float
Single Core Floating Point Speed
128 Pts Faster single-core fp speed.
+21%
106 Pts
QC Int
Quad Core Integer Speed
460 Pts Faster quad-core int speed.
+24%
370 Pts
QC Float
Quad Core Floating Point Speed
499 Pts Faster quad-core fp speed.
+25%
400 Pts
MC Int
Multi Core Integer Speed
668 Pts Faster multi-core int speed.
+26%
529 Pts
MC Float
Multi Core Floating Point Speed
739 Pts Faster multi-core fp speed.
+27%
584 Pts
Launch Date
Launch Date
Q4'17 Q2'18
Cache
Cache
9 MB 9 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
Recommended Price
Recommended Customer Price
N/A $182.00
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) PCG 2015A (35W)
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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Processor Rankings (Price vs Performance) February 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]

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Group Test Results

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  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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