IntelBX80677I57400
IntelBX80684I58400

4 Cores, 4 Threads @3.0GHz, Kaby Lake.
Release date: Q1 2017.

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

Real World Speed
Performance profile from 91,302 user samples
49,745 User Benchmarks
Best Bench: 77% Base clock 3 GHz, turbo 3.3 GHz (avg)
Worst Bench: 51% Base clock 3 GHz, turbo 3.3 GHz (avg)
Poor: 51% Great: 77%
SPEED RANK: 151st / 1137
Gaming
Gaming 69%
Battle cruiser
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 42%
Speed boat
41,557 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 82% Base clock 2.8 GHz, turbo 1.3 GHz (avg)
Poor: 82% Great: 94%
SPEED RANK: 37th / 1137
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 65%
Destroyer
Effective Speed
Effective CPU Speed
69.4 % 89.3 % Faster effective speed.
+29%
SC Mixed
Avg. Single Core Mixed Speed
97.6 Pts 117 Pts Faster single-core speed.
+20%
QC Mixed
Avg. Quad Core Mixed Speed
356 Pts 453 Pts Faster quad-core speed.
+27%
MC Mixed
Avg. Multi Core Mixed Speed
367 Pts 655 Pts Much faster multi-core speed.
+78%
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
406 Pts 478 Pts Faster OC quad-core speed.
+18%
MC Mixed
OC Multi Core Mixed Speed
406 Pts 702 Pts Much faster OC multi-core speed.
+73%
Market Share
Based on 12,131,818 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.83 % 1.02 % Higher market share.
+23%
Value
Value For Money
80 % 103 % Better value.
+29%
User Rating
UBM User Rating
59 % 116 % Hugely more popular.
+97%
Price
Price (score)
$200 $200
Age
Newest
22 Months 13 Months Much more recent.
+41%
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
4 threads 6 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
3 GHz Slightly faster base frequency.
+7%
2.8 GHz
Turbo Clock
Turbo Clock Speed
3.5 GHz 4 GHz Slightly faster turbo frequency.
+14%
SC Int
Single Core Integer Speed
103 Pts 118 Pts Slightly faster single-core int speed.
+15%
SC Float
Single Core Floating Point Speed
111 Pts 128 Pts Faster single-core fp speed.
+15%
QC Int
Quad Core Integer Speed
391 Pts 461 Pts Faster quad-core int speed.
+18%
QC Float
Quad Core Floating Point Speed
426 Pts 501 Pts Faster quad-core fp speed.
+18%
MC Int
Multi Core Integer Speed
392 Pts 675 Pts Much faster multi-core int speed.
+72%
MC Float
Multi Core Floating Point Speed
426 Pts 740 Pts Much faster multi-core fp speed.
+74%
Series
CPU Architecture
Kaby Lake Coffee Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
HD 630 UHD 630
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
Recommended Price
Recommended Customer Price
$182.00 N/A
Memory Types
Memory Types
DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V 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
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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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) November 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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  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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