IntelBX80662I76700
IntelBX80684I58400

4 Cores, 8 Threads @3.4GHz, Skylake.
Release date: Q3 2015.

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

Real World Speed
Performance profile from 133,845 user samples
85,057 User Benchmarks
Best Bench: 87% Base clock 3.4 GHz, turbo 3.4 GHz (avg)
Worst Bench: 61% Base clock 3.4 GHz, turbo 0.8 GHz (avg)
Poor: 61% Great: 87%
SPEED RANK: 104th / 1144
Gaming
Gaming 74%
Battleship
Desktop
Desktop 75%
Battleship
Workstation
Workstation 56%
Gunboat
48,788 User Benchmarks
Best Bench: 93% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 75% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 75% Great: 93%
SPEED RANK: 46th / 1144
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
74.5 % 88.6 % Faster effective speed.
+19%
SC Mixed
Avg. Single Core Mixed Speed
105 Pts 116 Pts Slightly faster single-core speed.
+10%
QC Mixed
Avg. Quad Core Mixed Speed
362 Pts 450 Pts Faster quad-core speed.
+24%
MC Mixed
Avg. Multi Core Mixed Speed
575 Pts 648 Pts Slightly faster multi-core speed.
+13%
SC Mixed
OC Single Core Mixed Speed
121 Pts 122 Pts +1%
QC Mixed
OC Quad Core Mixed Speed
440 Pts 475 Pts Slightly faster OC quad-core speed.
+8%
MC Mixed
OC Multi Core Mixed Speed
622 Pts 700 Pts Slightly faster OC multi-core speed.
+13%
Market Share
Based on 12,922,794 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.89 % 1.23 % Much higher market share.
+38%
Value
Value For Money
72.8 % 106 % Much better value.
+46%
User Rating
UBM User Rating
65 % 117 % Much more popular.
+80%
Price
Price (score)
$310 $179 Much cheaper.
+42%
Age
Newest
39 Months 14 Months Much more recent.
+64%
TDP
Thermal Design Power (TDP)
65 Watts 65 Watts
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads Much higher thread count.
+33%
6 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3.4 GHz Faster base frequency.
+21%
2.8 GHz
Turbo Clock
Turbo Clock Speed
4 GHz 4 GHz
SC Int
Single Core Integer Speed
117 Pts 118 Pts +1%
SC Float
Single Core Floating Point Speed
124 Pts 127 Pts +2%
QC Int
Quad Core Integer Speed
427 Pts 460 Pts Slightly faster quad-core int speed.
+8%
QC Float
Quad Core Floating Point Speed
456 Pts 499 Pts Slightly faster quad-core fp speed.
+9%
MC Int
Multi Core Integer Speed
574 Pts 670 Pts Faster multi-core int speed.
+17%
MC Float
Multi Core Floating Point Speed
656 Pts 740 Pts Slightly faster multi-core fp speed.
+13%
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
8 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
$303.00 - $312.00 N/A
Memory Types
Memory Types
DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 530 Intel® UHD Graphics 630
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.15 GHz 1.05 GHz
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 ‡
Up to 1x16, 2x8, 1x8+2x4 Up to 1x16 or 2x8 or 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]

MORE DETAILS

Processor Rankings (Price vs Performance) December 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.
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CPUGPUSSD
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