IntelBX80684I58400
IntelBX80662I36100

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

2 Cores, 4 Threads @3.7GHz, Skylake.
Release date: Q4 2015.

Real World Speed
Performance profile from 81,256 user samples
40,393 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 80% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Poor: 80% Great: 94%
SPEED RANK: 34th / 1132
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 65%
Destroyer
40,863 User Benchmarks
Best Bench: 66% Base clock 2.8 GHz, turbo 3.7 GHz (avg)
Worst Bench: 46% Base clock 3.7 GHz, turbo 0.8 GHz (avg)
Poor: 46% Great: 66%
SPEED RANK: 232nd / 1132
Gaming
Gaming 60%
Destroyer
Desktop
Desktop 67%
Battle cruiser
Workstation
Workstation 36%
Jet ski
Effective Speed
Effective CPU Speed
89.4 % Much faster effective speed.
+49%
60.1 %
SC Mixed
Avg. Single Core Mixed Speed
117 Pts Slightly faster single-core speed.
+12%
104 Pts
QC Mixed
Avg. Quad Core Mixed Speed
454 Pts Much faster quad-core speed.
+63%
278 Pts
MC Mixed
Avg. Multi Core Mixed Speed
657 Pts Hugely faster multi-core speed.
+130%
286 Pts
SC Mixed
OC Single Core Mixed Speed
123 Pts Slightly faster OC single-core speed.
+8%
114 Pts
QC Mixed
OC Quad Core Mixed Speed
477 Pts Much faster OC quad-core speed.
+54%
310 Pts
MC Mixed
OC Multi Core Mixed Speed
705 Pts Hugely faster OC multi-core speed.
+126%
312 Pts
Market Share
Based on 11,606,492 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.32 % Hugely higher market share.
+222%
0.41 %
Value
Value For Money
102 % Better value.
+22%
83.8 %
User Rating
UBM User Rating
110 % Much more popular.
+77%
62 %
Price
Price (score)
$205 $120 Much cheaper.
+41%
Age
Newest
12 Months Much more recent.
+67%
36 Months
TDP
Thermal Design Power (TDP)
65 Watts 47 Watts More energy efficient.
+28%
Cores
CPU Processing Cores
6 cores Hugely higher core count.
+200%
2 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 3.7 GHz Much faster base frequency.
+32%
Turbo Clock
Turbo Clock Speed
4 GHz Slightly faster turbo frequency.
+8%
3.7 GHz
SC Int
Single Core Integer Speed
119 Pts Slightly faster single-core int speed.
+7%
111 Pts
SC Float
Single Core Floating Point Speed
128 Pts Slightly faster single-core fp speed.
+8%
118 Pts
QC Int
Quad Core Integer Speed
460 Pts Much faster quad-core int speed.
+60%
287 Pts
QC Float
Quad Core Floating Point Speed
499 Pts Much faster quad-core fp speed.
+52%
328 Pts
MC Int
Multi Core Integer Speed
675 Pts Hugely faster multi-core int speed.
+135%
287 Pts
MC Float
Multi Core Floating Point Speed
740 Pts Hugely faster multi-core fp speed.
+126%
328 Pts
Series
CPU Architecture
Coffee Lake Skylake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 HD 530
Launch Date
Launch Date
Q4'17 Q3'15
Cache
Cache
9 MB 3 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX 2.0
Embedded Options Available
Embedded Options Available
No Yes
Recommended Price
Recommended Customer Price
N/A $117.00
Memory Types
Memory Types
DDR4-2666 DDR4-1866/2133, DDR3L-1333/1600 @ 1.35V
ECC Memory Supported
ECC Memory Supported ‡
No Yes
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 530
Turbo Boost Tech
Intel® Turbo Boost Technology
2.0 No
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
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]

MORE DETAILS

Processor Rankings (Price vs Performance) October 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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  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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HDDRAMUSB
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