IntelBX80684I58400
IntelBX80684I99900K

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

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About

8 Cores, 16 Threads @3.6GHz, Coffee Lake.
Release date: Q4 2018.

Real World Speed
Performance profile from 256,868 user samples
133,331 User Benchmarks
Best Bench: 84% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 71% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 71% Great: 84%
SPEED RANK: 68th / 1206
Gaming
Gaming 79%
Battleship
Desktop
Desktop 80%
Battleship
Workstation
Workstation 56%
Gunboat
123,537 User Benchmarks
Best Bench: 109% Base clock 3.6 GHz, turbo 5.2 GHz (avg)
Worst Bench: 86% Base clock 3.6 GHz, turbo 4.95 GHz (avg)
Poor: 86% Great: 109%
SPEED RANK: 2nd / 1206
Gaming
Gaming 100%
UFO
Desktop
Desktop 100%
UFO
Workstation
Workstation 101%
UFO
Effective Speed
Effective CPU Speed
79.4 % 100 % Faster effective speed.
+26%
1-Core
Avg. Single Core Mixed Speed
116 Pts 146 Pts Faster single-core speed.
+26%
2-Core
Avg. Dual Core Mixed Speed
230 Pts 287 Pts Faster dual-core speed.
+25%
4-Core
Avg. Quad Core Mixed Speed
447 Pts 565 Pts Faster quad-core speed.
+26%
8-Core
Avg. Octa Core Mixed Speed
638 Pts 1060 Pts Much faster octa-core speed.
+66%
1-Core
OC Single Core Mixed Speed
122 Pts 156 Pts Faster OC single-core speed.
+28%
2-Core
OC Dual Core Mixed Speed
242 Pts 310 Pts Faster OC dual-core speed.
+28%
4-Core
OC Quad Core Mixed Speed
475 Pts 619 Pts Much faster OC quad-core speed.
+30%
8-Core
OC Octa Core Mixed Speed
689 Pts 1210 Pts Much faster OC octa-core speed.
+76%
Market Share
Based on 24,129,548 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.94 % 1.48 % Much higher market share.
+57%
Value
Value For Money
86.9 % +2% 85.4 %
User Rating
UBM User Rating
74 % 164 % Hugely more popular.
+122%
Price
Price (score)
$200 Much cheaper.
+60%
$498
Age
Newest
27 Months 15 Months Much more recent.
+44%
TDP
Thermal Design Power (TDP)
65 Watts Much more energy efficient.
+32%
95 Watts
Cores
CPU Processing Cores
6 cores 8 cores Much higher core count.
+33%
Threads
CPU Processing Threads
6 threads 16 threads Hugely higher thread count.
+167%
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 5 GHz Faster turbo frequency.
+25%
64-Core
OC Multi Core Mixed Speed
693 Pts 1661 Pts Hugely faster OC 64-core speed.
+140%
64-Core
Avg. Multi Core Mixed Speed
643 Pts 1509 Pts Hugely faster 64-core speed.
+135%
Series
CPU Architecture
Coffee Lake Coffee Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1151
Graphics
Integrated Graphics
UHD 630 UHD 630
Launch Date
Launch Date
Q4'17 Q4'18
Cache
Cache
9 MB 16 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
Recommended Price
Recommended Customer Price
N/A $488.00 - $499.00
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) PCG 2015D (130W)
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.05 GHz 1.20 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
No Yes
TSX-NI
Intel® TSX-NI
No Yes
Stable Image Platform Program (SIPP)
Intel® Stable Image Platform Program (SIPP)
No Yes
Trusted Execution Tech
Intel® Trusted Execution 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

The Intel i9-9900K is an 8 core, 16 thread, unlocked 9th generation Coffee Lake processor. It has a base / boost clocks of 3.6 / 4.7 GHz and a single-core boost of 5.0 GHz (the highest frequency achieved yet from this class of Intel CPU). It features 16 MB of cache, a 95W TDP and Intel UHD 630 graphics. The 9900K is compatible with the new Z390 chipset, and subject to a BIOS update, is also compatible with the older Z370 chipset. Aimed at users who do not wish to compromise, the i9-9900K offers the best gaming and desktop experience available at any price. Heavy workstation users should consider the Ryzen 9 3900X which is similarly priced. Comparing the overclocked 3900X shows that it is just 10% worse for gaming and desktop (sub octa-core) but around 40% better for 64-core computations. Gamers should consider the 9700K which offers identical overclocked gaming performance at a $100 USD discount. [Oct '18 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) January 2020 CPU Rankings.

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. 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.
  • 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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