IntelBX80684I58400
IntelBX80684I38100

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

4 Cores, 4 Threads
@3.6GHz Coffee Lake (2017)

Real World Speed
Performance profile from 7,228 user samples
4,472 User Benchmarks
Best Bench: 96% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 88% Base clock 2.8 GHz, turbo 1.1 GHz (avg)
Poor: 88% Great: 96%
SPEED RANK: 24th / 985
Gaming
Gaming 93%
Nuclear submarine
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 68%
Battle cruiser
2,756 User Benchmarks
Best Bench: 86% Base clock 3.6 GHz, turbo 3.6 GHz (avg)
Worst Bench: 67% Base clock 3.6 GHz, turbo 3.6 GHz (avg)
Poor: 67% Great: 86%
SPEED RANK: 43rd / 985
Gaming
Gaming 81%
Aircraft carrier
Desktop
Desktop 79%
Battleship
Workstation
Workstation 49%
Yacht
Effective Speed
Effective CPU Speed
92.5 % Slightly faster effective speed.
+14%
81.4 %
SC Mixed
Avg. Single Core Mixed Speed
120 Pts Slightly faster single-core speed.
+7%
112 Pts
QC Mixed
Avg. Quad Core Mixed Speed
471 Pts Slightly faster quad-core speed.
+12%
422 Pts
MC Mixed
Avg. Multi Core Mixed Speed
689 Pts Much faster multi-core speed.
+59%
432 Pts
SC Mixed
OC Single Core Mixed Speed
126 Pts Slightly faster OC single-core speed.
+11%
114 Pts
QC Mixed
OC Quad Core Mixed Speed
489 Pts Slightly faster OC quad-core speed.
+7%
455 Pts
MC Mixed
OC Multi Core Mixed Speed
726 Pts Much faster OC multi-core speed.
+58%
459 Pts
Market Share
Based on 7,461,238 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.54 % Much higher market share.
+74%
0.31 %
Value
Value For Money
111 % 117 % Slightly better value.
+6%
User Rating
UBM User Rating
113 % More popular.
+27%
89 %
Price
Price (score)
$179 $110 Much cheaper.
+38%
Age
Newest
4 Months 4 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 3.6 GHz Faster base frequency.
+29%
Turbo Clock
Turbo Clock Speed
4 GHz Slightly faster turbo frequency.
+11%
3.6 GHz
SC Int
Single Core Integer Speed
122 Pts Slightly faster single-core int speed.
+10%
111 Pts
SC Float
Single Core Floating Point Speed
129 Pts Slightly faster single-core fp speed.
+9%
118 Pts
QC Int
Quad Core Integer Speed
477 Pts Slightly faster quad-core int speed.
+7%
445 Pts
QC Float
Quad Core Floating Point Speed
505 Pts Slightly faster quad-core fp speed.
+7%
470 Pts
MC Int
Multi Core Integer Speed
707 Pts Much faster multi-core int speed.
+59%
445 Pts
MC Float
Multi Core Floating Point Speed
751 Pts Much faster multi-core fp speed.
+59%
471 Pts
Series
CPU Architecture
Coffee Lake (2017) Coffee Lake (2017)
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 UHD 630
Cache
Cache
9 MB 6 MB
Memory Types
Memory Types
DDR4-2666 DDR4-2400
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.05 GHz 1.10 GHz
Turbo Boost Tech
Intel® Turbo Boost Technology
2.0 No

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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Intel’s i3-8100 from their 8th generation of Core processors is a mainstream quad-core CPU. It is the entry model of the latest Coffee Lake line up with a clock speed of 3.6 GHz. Previously, i3 Kaby Lake processors had two cores with hyperthreading, but now, i3 Coffee Lake processors have 4 cores and offer much better value for money in terms of dollars per core. With a performance profile that closely matches last years mid range Kaby Lake i5's (the then go-to mid range gaming choice) and a price tag of just $120, the i3-8100 represents excellent value for money. Unfortunately, like all Coffe Lake processors, the i3-8100 does require a new 300-series motherboard even though it shares the same LGA1151 socket as the previous generation of Kaby Lake 200 motherboards. Intel were clearly mindful of AMD's similarly priced quad core Ryzen 3 1200 which achieves very comparable single, and quad-core benchmarks to the i3-8100.  [Oct '17 CPUPro]

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Processor Rankings (Price vs Performance) February 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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Group Test Results

  • 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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