IntelBX80684I58400
IntelBX80677I57400

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

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

Real World Speed
Performance profile from 75,544 user samples
32,309 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 80% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 80% Great: 94%
SPEED RANK: 31st / 1128
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 65%
Destroyer
43,235 User Benchmarks
Best Bench: 78% Base clock 3 GHz, turbo 3.3 GHz (avg)
Worst Bench: 56% Base clock 3 GHz, turbo 0.95 GHz (avg)
Poor: 56% Great: 78%
SPEED RANK: 130th / 1128
Gaming
Gaming 71%
Battleship
Desktop
Desktop 70%
Battle cruiser
Workstation
Workstation 43%
Speed boat
Effective Speed
Effective CPU Speed
89.2 % Faster effective speed.
+26%
70.7 %
SC Mixed
Avg. Single Core Mixed Speed
117 Pts Faster single-core speed.
+18%
98.8 Pts
QC Mixed
Avg. Quad Core Mixed Speed
452 Pts Faster quad-core speed.
+24%
364 Pts
MC Mixed
Avg. Multi Core Mixed Speed
655 Pts Much faster multi-core speed.
+76%
373 Pts
SC Mixed
OC Single Core Mixed Speed
123 Pts Slightly faster OC single-core speed.
+15%
107 Pts
QC Mixed
OC Quad Core Mixed Speed
478 Pts Faster OC quad-core speed.
+17%
408 Pts
MC Mixed
OC Multi Core Mixed Speed
704 Pts Much faster OC multi-core speed.
+72%
409 Pts
Market Share
Based on 10,962,467 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.43 % Much higher market share.
+44%
0.99 %
Value
Value For Money
103 % Better value.
+21%
84.8 %
User Rating
UBM User Rating
114 % Much more popular.
+75%
65 %
Price
Price (score)
$200 $180 Slightly cheaper.
+10%
Age
Newest
11 Months Much more recent.
+45%
20 Months
TDP
Thermal Design Power (TDP)
65 Watts 65 Watts
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores
Threads
CPU Processing Threads
6 threads Much higher thread count.
+50%
4 threads
Lithography
Manufacturing process
14 nm 14 nm
Base Clock
Base Clock Speed
2.8 GHz 3 GHz Slightly faster base frequency.
+7%
Turbo Clock
Turbo Clock Speed
4 GHz Slightly faster turbo frequency.
+14%
3.5 GHz
SC Int
Single Core Integer Speed
118 Pts Slightly faster single-core int speed.
+15%
103 Pts
SC Float
Single Core Floating Point Speed
128 Pts Slightly faster single-core fp speed.
+14%
112 Pts
QC Int
Quad Core Integer Speed
462 Pts Faster quad-core int speed.
+18%
393 Pts
QC Float
Quad Core Floating Point Speed
499 Pts Faster quad-core fp speed.
+17%
426 Pts
MC Int
Multi Core Integer Speed
677 Pts Much faster multi-core int speed.
+72%
393 Pts
MC Float
Multi Core Floating Point Speed
738 Pts Much faster multi-core fp speed.
+73%
426 Pts
Series
CPU Architecture
Coffee Lake Kaby Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 HD 630
Launch Date
Launch Date
Q4'17 Q1'17
Cache
Cache
9 MB 6 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0
Recommended Price
Recommended Customer Price
N/A $182.00
Memory Types
Memory Types
DDR4-2666 DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
350 MHz 350.00 MHz
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.05 GHz 1.00 GHz
TSX-NI
Intel® TSX-NI
No Yes
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) September 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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