IntelBX80684I58400
Group Average(9 Highest-Voted)
Real World Speed
Performance profile from 87,980 user samples
87,980 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 81% Base clock 2.8 GHz, turbo 1.2 GHz (avg)
Poor: 81% Great: 94%
SPEED RANK: 54th / 1159
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
88.9 % 92.6 % +4%
SC Mixed
Avg. Single Core Mixed Speed
117 Pts 118 Pts +1%
QC Mixed
Avg. Quad Core Mixed Speed
451 Pts +0% 450 Pts
MC Mixed
Avg. Multi Core Mixed Speed
650 Pts 916 Pts Much faster multi-core speed.
+41%
SC Mixed
OC Single Core Mixed Speed
122 Pts 131 Pts Slightly faster OC single-core speed.
+7%
QC Mixed
OC Quad Core Mixed Speed
478 Pts 511 Pts Slightly faster OC quad-core speed.
+7%
MC Mixed
OC Multi Core Mixed Speed
700 Pts 1,035 Pts Much faster OC multi-core speed.
+48%
Market Share
Based on 17,677,617 CPUs tested.
User Rating
UBM User Rating
115 % 137 % More popular.
+19%
Market Share
Market Share (trailing 30 days)
1.35 % 1.69 % Higher market share.
+25%
Price
Price (score)
$196 Cheaper.
+18%
231 USD
Value
Value For Money
103 % 104 % +1%
TDP
Thermal Design Power (TDP)
65 Watts More energy efficient.
+27%
82.3 Watts
Cores
CPU Processing Cores
6 cores 6.22 cores +4%
Threads
CPU Processing Threads
6 threads 11.1 threads Hugely higher thread count.
+85%
Lithography
Manufacturing process
14 nm 13.6 nm +3%
Base Clock
Base Clock Speed
2.8 GHz 3.47 GHz Faster base frequency.
+24%
Turbo Clock
Turbo Clock Speed
4 GHz 4.11 GHz +3%
SC Int
Single Core Integer Speed
118 Pts 126 Pts Slightly faster single-core int speed.
+7%
SC Float
Single Core Floating Point Speed
128 Pts 136 Pts Slightly faster single-core fp speed.
+7%
QC Int
Quad Core Integer Speed
460 Pts 493 Pts Slightly faster quad-core int speed.
+7%
QC Float
Quad Core Floating Point Speed
500 Pts 535 Pts Slightly faster quad-core fp speed.
+7%
MC Int
Multi Core Integer Speed
666 Pts 987 Pts Much faster multi-core int speed.
+48%
MC Float
Multi Core Floating Point Speed
738 Pts 1,066 Pts Much faster multi-core fp speed.
+45%
Age
Newest
20 Months Slightly more recent.
+8%
21.6 Months
Series
CPU Architecture
Coffee Lake   —
Socket
Motherboard Socket
FCLGA1151   —
Graphics
Integrated Graphics
UHD 630   —
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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) June 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

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • 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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