IntelBX80677I77700
IntelBX80684I58400

4 Cores, 8 Threads @3.6GHz, Kaby Lake.
Release date: Q1 2017.

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

Real World Speed
Performance profile from 337,768 user samples
158,419 User Benchmarks
Best Bench: 89% Base clock 3.6 GHz, turbo 4 GHz (avg)
Worst Bench: 68% Base clock 3.6 GHz, turbo 0.8 GHz (avg)
Poor: 68% Great: 89%
SPEED RANK: 124th / 1257
Gaming
Gaming 80%
Aircraft carrier
Desktop
Desktop 84%
Aircraft carrier
Workstation
Workstation 66%
Battle cruiser
179,349 User Benchmarks
Best Bench: 91% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 73% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 73% Great: 91%
SPEED RANK: 71st / 1257
Gaming
Gaming 86%
Aircraft carrier
Desktop
Desktop 87%
Aircraft carrier
Workstation
Workstation 70%
Battleship
Effective Speed
Effective CPU Speed
80.5 % 85.7 % Slightly faster effective speed.
+6%
Memory
Avg. Memory Latency
87.6 Pts 89.5 Pts +2%
1-Core
Avg. Single Core Mixed Speed
116 Pts 116 Pts
2-Core
Avg. Dual Core Mixed Speed
221 Pts 228 Pts +3%
4-Core
Avg. Quad Core Mixed Speed
397 Pts 443 Pts Faster quad-core speed.
+12%
8-Core
Avg. Octa Core Mixed Speed
595 Pts 629 Pts Slightly faster octa-core speed.
+6%
Memory
OC Memory Latency
94.4 Pts 95.4 Pts +1%
1-Core
OC Single Core Mixed Speed
128 Pts +5% 122 Pts
2-Core
OC Dual Core Mixed Speed
249 Pts +3% 242 Pts
4-Core
OC Quad Core Mixed Speed
471 Pts 475 Pts +1%
8-Core
OC Octa Core Mixed Speed
664 Pts 693 Pts +4%
Market Share
Based on 31,470,698 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.73 % 1.04 % Much higher market share.
+42%
Value
Value For Money
77 % 97.8 % Better value.
+27%
User Rating
UBM User Rating
87 % +1% 86 %
Price
Price (score)
$327 $172 Much cheaper.
+47%
Age
Newest
43 Months 34 Months More recent.
+21%
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
3.6 GHz Faster base frequency.
+29%
2.8 GHz
Turbo Clock
Turbo Clock Speed
4.2 GHz +5% 4 GHz
64-Core
OC Multi Core Mixed Speed
667 Pts 693 Pts +4%
64-Core
Avg. Multi Core Mixed Speed
603 Pts 635 Pts Slightly faster 64-core speed.
+5%
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
8 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
$303.00 - $312.00 N/A
Max Turbo Frequency
Max Turbo Frequency
4.20 GHz 4.00 GHz
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
1.15 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]

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We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. 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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