Intel
IntelBX80684I58400
  

2 Cores, 2 Threads @1.6 GHz, Braswell.
Release date ≈ Q2 2016.

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

Real World Speed
Performance profile from 111,268 user samples
7,711 User Benchmarks
Best Bench: 15% Base clock 1.6 GHz, turbo 2.5 GHz (avg)
Worst Bench: 7% Base clock 1.6 GHz, turbo 2.5 GHz (avg)
Poor: 7% Great: 15%
SPEED RANK: 1059th / 1173
Gaming
Gaming 12%
Tree trunk
Desktop
Desktop 16%
Surfboard
Workstation
Workstation 7%
Tree trunk
103,557 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 79% Base clock 2.8 GHz, turbo 0.8 GHz (avg)
Poor: 79% Great: 94%
SPEED RANK: 59th / 1173
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
12.4 % 88.6 % Hugely faster effective speed.
+612%
SC Mixed
Avg. Single Core Mixed Speed
26.2 Pts 116 Pts Hugely faster single-core speed.
+343%
QC Mixed
Avg. Quad Core Mixed Speed
50.1 Pts 450 Pts Hugely faster quad-core speed.
+798%
MC Mixed
Avg. Multi Core Mixed Speed
50.6 Pts 645 Pts Insanely faster multi-core speed.
+1,175%
SC Mixed
OC Single Core Mixed Speed
30.9 Pts 122 Pts Hugely faster OC single-core speed.
+295%
QC Mixed
OC Quad Core Mixed Speed
61.6 Pts 477 Pts Hugely faster OC quad-core speed.
+674%
MC Mixed
OC Multi Core Mixed Speed
61.3 Pts 697 Pts Insanely faster OC multi-core speed.
+1,037%
Market Share
Based on 18,517,725 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.04 % 1.14 % Insanely higher market share.
+2,750%
User Rating
UBM User Rating
52 % 112 % Hugely more popular.
+115%
Age
Newest
38+ Months 21 Months Much more recent.
+45%
SC Int
Single Core Integer Speed
41.2 Pts 118 Pts Hugely faster single-core int speed.
+186%
SC Float
Single Core Floating Point Speed
24.7 Pts 128 Pts Hugely faster single-core fp speed.
+418%
QC Int
Quad Core Integer Speed
82.3 Pts 460 Pts Hugely faster quad-core int speed.
+459%
QC Float
Quad Core Floating Point Speed
49.2 Pts 498 Pts Hugely faster quad-core fp speed.
+912%
MC Int
Multi Core Integer Speed
82 Pts 665 Pts Hugely faster multi-core int speed.
+711%
MC Float
Multi Core Floating Point Speed
48.9 Pts 738 Pts Insanely faster multi-core fp speed.
+1,409%
Launch Date
Launch Date
Q1'16 Q4'17
Cache
Cache
2 MB L2 9 MB
Embedded Options Available
Embedded Options Available
Yes No
Max Memory Size
Max Memory Size (dependent on memory type)
8 GB 64 GB
Memory Types
Memory Types
DDR3L-1600 DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 400 Intel® UHD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
320 MHz 350 MHz
InTru 3D Tech
Intel® InTru™ 3D Technology
No Yes
Graphics Video Max Memory
Graphics Video Max Memory
8 GB 64 GB
Package Size
Package Size
25mm x 27mm 37.5mm x 37.5mm
Turbo Boost Tech
Intel® Turbo Boost Technology
No 2.0
Virtualization for Directed I/O (VT-d)
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
No Yes
OS Guard
Intel® OS Guard
No Yes
PCI Express Revision
PCI Express Revision
2.0 3.0
PCI Express Configurations
PCI Express Configurations ‡
1x4/2x2/1x2 + 2x1/4x1 Up to 1x16 or 2x8 or 1x8+2x4
Max # of PCI Express Lanes
Max # of PCI Express Lanes
4 16

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Well....I guess....erm....screw it it's simply crap [Mar '19 TheWildShadow55]

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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) July 2019 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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Group Test Results

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  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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