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 332,513 user samples
141,513 User Benchmarks
Best Bench: 80% Base clock 3 GHz, turbo 3.3 GHz (avg)
Worst Bench: 58% Base clock 3 GHz, turbo 3.3 GHz (avg)
Poor: 58% Great: 80%
SPEED RANK: 249th / 1258
Gaming
Gaming 72%
Battleship
Desktop
Desktop 77%
Battleship
Workstation
Workstation 54%
Yacht
191,000 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: 74th / 1258
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 70%
Battleship
Effective Speed
Effective CPU Speed
72.3 % 85.4 % Faster effective speed.
+18%
Memory
Avg. Memory Latency
84.1 Pts 89.2 Pts Slightly lower memory latency.
+6%
1-Core
Avg. Single Core Mixed Speed
97.7 Pts 115 Pts Faster single-core speed.
+18%
2-Core
Avg. Dual Core Mixed Speed
192 Pts 227 Pts Faster dual-core speed.
+18%
4-Core
Avg. Quad Core Mixed Speed
349 Pts 442 Pts Faster quad-core speed.
+27%
8-Core
Avg. Octa Core Mixed Speed
356 Pts 627 Pts Much faster octa-core speed.
+76%
Memory
OC Memory Latency
92 Pts 95.1 Pts +3%
1-Core
OC Single Core Mixed Speed
108 Pts 122 Pts Faster OC single-core speed.
+13%
2-Core
OC Dual Core Mixed Speed
210 Pts 242 Pts Faster OC dual-core speed.
+15%
4-Core
OC Quad Core Mixed Speed
400 Pts 473 Pts Faster OC quad-core speed.
+18%
8-Core
OC Octa Core Mixed Speed
399 Pts 691 Pts Much faster OC octa-core speed.
+73%
Market Share
Based on 31,799,135 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.77 % 0.88 % Higher market share.
+14%
Value
Value For Money
81.2 % 98.2 % Better value.
+21%
User Rating
UBM User Rating
68 % 85 % More popular.
+25%
Price
Price (score)
$182 $167 Slightly cheaper.
+8%
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
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 Faster turbo frequency.
+14%
64-Core
OC Multi Core Mixed Speed
403 Pts 694 Pts Much faster OC 64-core speed.
+72%
64-Core
Avg. Multi Core Mixed Speed
359 Pts 635 Pts Much faster 64-core speed.
+77%
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
Max Turbo Frequency
Max Turbo Frequency
3.50 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
1.00 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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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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