IntelBX80684I58400
Intel

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

  

4 Cores, 4 Threads @3 GHz, Ivy Bridge.
Release date ≤ Q4 2013.

Real World Speed
Performance profile from 308,349 user samples
261,280 User Benchmarks
Best Bench: 90% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 72% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 72% Great: 90%
SPEED RANK: 97th / 1316
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 70%
Battle cruiser
47,069 User Benchmarks
Best Bench: 74% Base clock 3.15 GHz, turbo 3.55 GHz (avg)
Worst Bench: 55% Base clock 3 GHz, turbo 1.15 GHz (avg)
Poor: 55% Great: 74%
SPEED RANK: 382nd / 1316
Gaming
Gaming 67%
Battle cruiser
Desktop
Desktop 70%
Battleship
Workstation
Workstation 49%
Yacht
Effective Speed
Effective CPU Speed
84.6 % Faster effective speed.
+27%
66.7 %
Memory
Avg. Memory Latency
88.3 Pts Slightly lower memory latency.
+7%
82.8 Pts
1-Core
Avg. Single Core Mixed Speed
114 Pts Much faster single-core speed.
+40%
81.3 Pts
2-Core
Avg. Dual Core Mixed Speed
226 Pts Much faster dual-core speed.
+42%
159 Pts
4-Core
Avg. Quad Core Mixed Speed
439 Pts Much faster quad-core speed.
+50%
293 Pts
8-Core
Avg. Octa Core Mixed Speed
625 Pts Hugely faster octa-core speed.
+110%
297 Pts
Memory
OC Memory Latency
94.7 Pts +2% 92.4 Pts
1-Core
OC Single Core Mixed Speed
121 Pts Much faster OC single-core speed.
+38%
87.7 Pts
2-Core
OC Dual Core Mixed Speed
241 Pts Much faster OC dual-core speed.
+40%
172 Pts
4-Core
OC Quad Core Mixed Speed
473 Pts Much faster OC quad-core speed.
+44%
329 Pts
8-Core
OC Octa Core Mixed Speed
687 Pts Hugely faster OC octa-core speed.
+108%
330 Pts
Market Share
Based on 45,027,005 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.7 % Hugely higher market share.
+438%
0.13 %
User Rating
UBM User Rating
61 % More popular.
+13%
54 %
Age
Newest
45 Months Much more recent.
+51%
92+ Months
64-Core
OC Multi Core Mixed Speed
693 Pts Hugely faster OC 64-core speed.
+109%
332 Pts
64-Core
Avg. Multi Core Mixed Speed
629 Pts Hugely faster 64-core speed.
+110%
299 Pts
Launch Date
Launch Date
Q4'17 Q3'12
Cache
Cache
9 MB 6 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
N/A $182.00 - $187.00
Max Turbo Frequency
Max Turbo Frequency
4.00 GHz 3.2 GHz
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI
Thermal Solution Specification
Thermal Solution Specification
PCG 2015C (65W) 2011D
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-2666 DDR3 1333/1600
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 2500
Graphics Base Frequency
Graphics Base Frequency
350 MHz 650 MHz
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]

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Ripped it outta an old pre-built for free, runs great for what it is! [Jul '20 ProshotJake]

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Processor Rankings (Price vs Performance) July 2021 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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  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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  • - Reports are generated and presented on userbenchmark.com.
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