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Intel Core i5 Coffee Lake i5-8400 BOX (BX80684I58400)

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Intel BX80684I58400 8th Gen Core i5-8400 Processor

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Intel Core i5 Coffee Lake i5-8400 BOX
i5-8400 BOXi5-8500 BOX
Main
SeriesCore i5
Code nameCoffee Lake
SocketIntel LGA 1151 v2
Lithography14 nm
In boxBOX (fan)
Cores and Threads
Cores6 cores
Threads6 threads
Speed
Clock speed2.8 GHz
TurboBoost / TurboCore4 GHz
Cache
L3 cache9 MB
Specs
IGPUHD Graphics 630
Front side bus8 GT/s
TDP65 W
InstructionMMX, SSE, SSE2, SSE3, SSSE3, SSE4, SSE4.1, SSE4.2, AES, AVX, AVX2 / BMI, BMI1, BMI2, F16C, FMA3, EM64T, NX, XD, VT-x, VT-d, MPX, SGX /
Multiplier28
PCI Express3.0
Passmark CPU Mark test11625 points
Geekbench 4 test22258 points
Cinebench R15 test924 points
Memory
Max. RAM128 GB
Max. DDR4 speed2666 MHz
Channels2
Added to E-CatalogSeptember 2017
P/N
BX80684I58400

The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
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Model overview based on user reviews  
The Intel Core i5 Coffee Lake processors are praised for their excellent overclocking capabilities, with users achieving speeds up to 5 GHz and experiencing significant performance improvements in applications and games. Many users report smooth performance with no noticeable lags, even in demanding games like The Witcher 3 and GTA 5. However, some users have noted temperature fluctuations and the lack of integrated video drivers for certain Windows versions. While the processor is generally considered fast and reliable, there are occasional concerns about noise during gaming and potential overheating issues. Overall, it is recommended for those seeking a balance of performance and value, though some suggest considering newer models for better value.
Pros

Cons

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I was thinking of getting a Ryzen, but I need single-threaded compilation speed and that's Intel.
10 April 2018 
Normally runs in air at a minimum of 5GHz (I overclocked it with a multiplier of 50 but the CPU voltage was 1.5 in auto overclock, didn't want to risk it). Set to 4.9GHz in a stress test on AIDA64 with a maximum of 91°C on a ZALMAN 10S Optima for 17 minutes without throttling. Adjusted to 4.8GHz (CPU voltage 1.456 at 4.8 but lower otherwise) with a max temperature in games of 78°C, overclocked Corsair RAM 8x2=16GB to 3100 from 2400 nominal. Simple Asus Prime z370-P motherboard, overall satisfied.

CPU CPU Frequency Motherboard Chipset Memory CL-RCD-RP-RAS Read Speed
6x Core i5-8600K 4800 MHz Asus Prime Z370-P Z370 Int. Dual DDR4-3100 17-18-18-36 CR2 40331 MB/s
Overclocking with a simple multiplier, the increase from 6600k to 4.5GHz resulted in up to a 30% increase; compilation speed has significantly improved, and all applications have become more responsive.
sometimes the temperature on the cores jumps from 40-67 or the sensors are so inaccurate, or the monitoring system, there is no driver for integrated video on win7-8 and win10 32bit only on win10 64bit, if it were soldered like the 2500k it would be priceless
use Intel Core i5 Coffee Lake few months
Good percentage
24 February 2019 
Excellent percentage,
Forget about friezes, as well as lags, I have a 1050 ti, so everything is fire, temperature is 20-40 max degrees with a deepcool gamaxx 200t cooler, idle temperature is 15 or less (I played wither 3, gta 5, resident evil 2 re and cs on it go everything is fine)
Did not notice
use Intel i5-8400 OEM more than year
Take it, don't overpay for 8700k.
1 April 2018 
Quite fast. In CSGO on low internal graphics, 110-120 fps. Managed to overclock to 5 GHz on the MSI Z370 A-PRO, but didn't notice that the voltage reached 1.46. It heated up to 80 (didn't risk running the test in Cinebench, didn't install LinX before this. In the end, I decided not to push the hardware since 4.5 GHz is quite sufficient (in LinX at 15000 and 20 runs, it doesn't heat above 80 on the Xilence M403 cooler). I achieved the psychological threshold of 5 GHz, and now I won't push it further, or else it might start to degrade. Haven't encoded video yet - I'll add to the review later.
Fast. Can be overclocked to 5 GHz and above.
Nothing yet. Switched from a laptop, so the speed is satisfactory.
Dmitriyuse Intel Core i5 Coffee Lake less than month
3 out of 6 user review(s) shown
3 more user review(s)

Intel Core i5 Coffee Lake configurations

Price for Intel Core i5 Coffee Lake
Intel Core i5 Coffee Lake i5-8400 BOXfrom £106.661 offer
Intel Core i5 Coffee Lake i5-8500 BOXfrom £124.973 offers

There were four, now there are six

The Core i5-8400 is perhaps the most interesting processor in the Coffee Lake family. Unlike the i5 of previous generations, it has not four, but six physical cores at the same price of $180. As a result, the i5-8400 is even faster in games than the $350 quad-core but eight-thread Core i7-7700. Whereas in video editing and other professional tasks, eight threads are still faster than six cores.

Don't trust the numbers

At first glance, the i5-8400 has a low base frequency of only 2.8 GHz. And the claimed Turbo Boost frequency of 4 GHz is relevant only for one core. But in addition to single-core auto-overclocking, the i5-8400 also has a multi-core, but slightly less high-frequency one — up to 3.8 GHz. And unlike laptop low-voltage Core i5, auto overclocking is not limited in time. As long as there is enough motherboard power and a cooler heat sink (it is advisable to replace the boxed one with a tower one), Turbo Boost will work for all six cores.

The Smart Gamer's Choice

Like other Core Coffee Lakes, the i5-8400 has integrated UHD 630 graphics. But this processor is clearly not designed for it, but for discrete video cards like GeForce GTX 1060 or 1070 and Radeon RX 580 or Vega RX 56. The most resource-intensive games like Assassin's Creed Origins can no longer run smoothly on quad-core processors — give them at least six cores. The fault lies not so much with the game engines themselves, but rather with the Denuvo and VMProtect anti-piracy protection systems, which load the processor very heavily. As a result, at the moment, the i5-8400 can be considered the fundamental processor for assembling a gaming PC, which is capable of running any modern game and has a performance margin of at least a couple of years.