IntelBX80684I58400
Intel

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

2 Cores, 4 Threads @3.4 GHz, Sandy Bridge.
Release date ≤ Q4 2013.

Real World Speed
Performance profile from 107,103 user samples
103,557 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 79% Base clock 2.8 GHz, turbo 0.8 GHz (avg)
Poor: 79% Great: 94%
SPEED RANK: 58th / 1173
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
3,546 User Benchmarks
Best Bench: 50% Base clock 3.4 GHz, turbo 3.4 GHz (avg)
Worst Bench: 34% Base clock 3.4 GHz, turbo 3.4 GHz (avg)
Poor: 34% Great: 50%
SPEED RANK: 425th / 1173
Gaming
Gaming 46%
Yacht
Desktop
Desktop 52%
Yacht
Workstation
Workstation 27%
Raft
Effective Speed
Effective CPU Speed
88.6 % Hugely faster effective speed.
+94%
45.7 %
SC Mixed
Avg. Single Core Mixed Speed
116 Pts Much faster single-core speed.
+42%
81.6 Pts
QC Mixed
Avg. Quad Core Mixed Speed
450 Pts Hugely faster quad-core speed.
+117%
207 Pts
MC Mixed
Avg. Multi Core Mixed Speed
645 Pts Hugely faster multi-core speed.
+203%
213 Pts
SC Mixed
OC Single Core Mixed Speed
122 Pts Much faster OC single-core speed.
+36%
89.6 Pts
QC Mixed
OC Quad Core Mixed Speed
477 Pts Hugely faster OC quad-core speed.
+107%
230 Pts
MC Mixed
OC Multi Core Mixed Speed
697 Pts Hugely faster OC multi-core speed.
+200%
232 Pts
Market Share
Based on 18,552,346 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.15 % Insanely higher market share.
+3,733%
0.03 %
Value
Value For Money
102 % Much better value.
+52%
67.1 %
User Rating
UBM User Rating
112 % Hugely more popular.
+104%
55 %
Price
Price (score)
$199 $105 Much cheaper.
+47%
Age
Newest
21 Months Much more recent.
+69%
67+ Months
SC Int
Single Core Integer Speed
118 Pts Much faster single-core int speed.
+32%
89.3 Pts
SC Float
Single Core Floating Point Speed
128 Pts Much faster single-core fp speed.
+42%
89.9 Pts
QC Int
Quad Core Integer Speed
460 Pts Hugely faster quad-core int speed.
+107%
222 Pts
QC Float
Quad Core Floating Point Speed
498 Pts Hugely faster quad-core fp speed.
+117%
229 Pts
MC Int
Multi Core Integer Speed
665 Pts Hugely faster multi-core int speed.
+198%
223 Pts
MC Float
Multi Core Floating Point Speed
738 Pts Hugely faster multi-core fp speed.
+221%
230 Pts
Launch Date
Launch Date
Q4'17 Q3'11
Cache
Cache
9 MB 3 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX
Lithography
Lithography
14 nm 32 nm
Recommended Price
Recommended Customer Price
N/A $117.00
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-2666 DDR3 1066/1333
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 2000
Graphics Base Frequency
Graphics Base Frequency
350 MHz 850 MHz
# of Displays Supported
# of Displays Supported ‡
3 2
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.05 GHz 1.1 GHz
Turbo Boost Tech
Intel® Turbo Boost Technology
2.0 No
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
No Yes
Virtualization for Directed I/O (VT-d)
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
Yes No
AES New Instructions
Intel® AES New Instructions
Yes No
PCI Express Revision
PCI Express Revision
3.0 2.0

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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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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