IntelBX80684I58400
IntelBX80646I54690K

6 Cores, 6 Threads
@2.8GHz Coffee Lake (2017)

4 Cores, 4 Threads
@3.5GHz Haswell (2013)

Real World Speed
Performance profile from 83,519 user samples
9,970 User Benchmarks
Best Bench: 96% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 85% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 85% Great: 96%
SPEED RANK: 30th / 1089
Gaming
Gaming 92%
Nuclear submarine
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 67%
Battle cruiser
73,549 User Benchmarks
Best Bench: 99% Base clock 3.5 GHz, turbo 4.7 GHz (avg)
Worst Bench: 57% Base clock 3.5 GHz, turbo 1.1 GHz (avg)
Poor: 57% Great: 99%
SPEED RANK: 52nd / 1089
Gaming
Gaming 82%
Aircraft carrier
Desktop
Desktop 80%
Battleship
Workstation
Workstation 50%
Yacht
Effective Speed
Effective CPU Speed
92.1 % Slightly faster effective speed.
+13%
81.9 %
SC Mixed
Avg. Single Core Mixed Speed
120 Pts Slightly faster single-core speed.
+6%
113 Pts
QC Mixed
Avg. Quad Core Mixed Speed
468 Pts Slightly faster quad-core speed.
+10%
424 Pts
MC Mixed
Avg. Multi Core Mixed Speed
687 Pts Much faster multi-core speed.
+59%
433 Pts
SC Mixed
OC Single Core Mixed Speed
125 Pts 134 Pts Slightly faster OC single-core speed.
+7%
QC Mixed
OC Quad Core Mixed Speed
487 Pts 524 Pts Slightly faster OC quad-core speed.
+8%
MC Mixed
OC Multi Core Mixed Speed
723 Pts Much faster OC multi-core speed.
+37%
526 Pts
Market Share
Based on 8,436,789 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.14 % Higher market share.
+16%
0.98 %
Value
Value For Money
111 % Better value.
+29%
86.1 %
User Rating
UBM User Rating
107 % Much more popular.
+30%
82 %
Price
Price (score)
$179 Cheaper.
+30%
$255
Age
Newest
6 Months Hugely more recent.
+87%
47 Months
TDP
Thermal Design Power (TDP)
65 Watts More energy efficient.
+26%
88 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 Much newer manufacturing.
+36%
22 nm
Base Clock
Base Clock Speed
2.8 GHz 3.5 GHz Faster base frequency.
+25%
Turbo Clock
Turbo Clock Speed
4 GHz +3% 3.9 GHz
SC Int
Single Core Integer Speed
122 Pts 133 Pts Slightly faster single-core int speed.
+9%
SC Float
Single Core Floating Point Speed
129 Pts 133 Pts +3%
QC Int
Quad Core Integer Speed
476 Pts 522 Pts Slightly faster quad-core int speed.
+10%
QC Float
Quad Core Floating Point Speed
504 Pts 521 Pts +3%
MC Int
Multi Core Integer Speed
703 Pts Much faster multi-core int speed.
+35%
522 Pts
MC Float
Multi Core Floating Point Speed
744 Pts Much faster multi-core fp speed.
+42%
524 Pts
Series
CPU Architecture
Coffee Lake (2017) Haswell (2013)
Socket
Motherboard Socket
FCLGA1151 FCLGA1150
Graphics
Integrated Graphics
UHD 630 HD 4600
Launch Date
Launch Date
Q4'17 Q2'14
Cache
Cache
9 MB 6 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
N/A $242.00 - $243.00
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI2
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) PCG 2013D
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-2666 DDR3-1333/1600, DDR3L-1333/1600 @ 1.5V
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 4600
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.05 GHz 1.2 GHz
Graphics Video Max Memory
Graphics Video Max Memory
64 GB 2 GB
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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The Intel Core i5-4690K is the latest incremental upgrade to Intel's unlocked mid-range quad core family of processors. The 4690K replaces the 4670K. Comparing the 4690K and 4670K shows that little has changed. The two chips share identical architecture; in fact the only difference between them is a 100 MHz bump to both the base and turbo clocks. The 100 MHz bump translates to an insignificant 2.9% performance increase. In terms of outright performance the 4690K has an effective speed of 103 which thanks to its superb single and dual core performance, is 12% stronger than the average of the group leaders. Overall the 4690K brings nothing new to the table so owners of previous flagship i5's will gain little by upgrading but as a new purchase the 4690K is a strong contender for both power users and high end gamers. [Jul '14 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) April 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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  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance and price.
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