Intel Core i5 Coffee Lake i5-8400 BOX (BX80684I58400)
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Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Intel 2026 - new arrivals, bestsellers, and the most relevant models Intel.
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Buy Intel Core i5 Coffee Lake i5-8400 BOX
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Intel I5-8400 Intel Core i5 Desktop i5-8400 6 Core 2.80GHz LGA 1151 9 MB L3 Processor Refurbished I5-8400 | $78.93 |  | |||
Intel I5-8400 | Core i5 Desktop i5-8400 6 Core 2.80GHz LGA 1151 9 MB L3 Processor Refurbished I5-8400 | $86.88 |  | |||
| $119.85 |  | ||||
| $159.00 |  | ||||
Intel SR3QT Intel Core i5 Desktop i5-8400 6 Core 2.80GHz LGA 1151 Desktop Processor Refurbished SR3QT | $192.93 | | |||
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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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Bought one like this in 2017 for my gaming build, back then it was perfect, served well until 2022. After that, an upgrade was necessary. At the time of release, it had excellent performance Very quiet Rock solid By the end of 2025, this model is already quite outdated. Consider it only for a very budget upgrade to an old PC or as a temporary option.  Nazar Dobrovolskiy: use Intel i5-8400 BOX more than year |
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 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 |
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 |
3 out of 7 user review(s) shown
4 more user review(s)
Intel Core i5 Coffee Lake configurations
| Price for Intel Core i5 Coffee Lake | ||||
|---|---|---|---|---|
 | Intel Core i5 Coffee Lake i5-8400 BOX | from $78.93 | 15 offers | |
| Intel Core i5 Coffee Lake i5-8400 OEM | from $421.05 | 2 offers | |
| Intel Core i5 Coffee Lake i5-8400T OEM | from $97.17 | 3 offers | |
| Intel Core i5 Coffee Lake i5-8500 BOX | from $145.76 | 11 offers | |
| Intel Core i5 Coffee Lake i5-8500 OEM | from $252.58 | 2 offers | |
| Intel Core i5 Coffee Lake i5-8500T OEM | from $120.00 | 3 offers | |
| Intel Core i5 Coffee Lake i5-8600 BOX | from $170.84 | 8 offers | |
| Intel Core i5 Coffee Lake i5-8600 OEM | from $298.91 | 2 offers | |
| Intel Core i5 Coffee Lake i5-8600K BOX | from $121.47 | 10 offers | |
| Intel Core i5 Coffee Lake i5-8600K OEM | from $349.21 | 3 offers | |
| Intel Core i5 Coffee Lake i5-8600T OEM | from $314.32 | 2 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.
We recommendCompare using chart →
Intel LGA 1151 v2, cores 6, threads 6, 3.1 GHz, TurboBoost 4.6 GHz, process technology 14 nm, UHD Graphics 630, unlocked multiplier, integrated graphics, TDP 65 W, memory RAM: maximum 128 GB, DDR4 2666 MHz
Intel LGA 1151 v2, cores 2, threads 2, 3.2 GHz, process technology 14 nm, UHD Graphics 610, integrated graphics, TDP 54 W, memory RAM: maximum 64 GB, DDR4 2400 MHz
Intel LGA 1151 v2, cores 4, threads 4, 3.2 GHz, process technology 14 nm, HD Graphics P630, integrated graphics, ECC, TDP 65 W, memory RAM: maximum 128 GB, DDR4 2666 MHz
Intel LGA 1151 v2, cores 8, threads 16, 3.1 GHz, TurboBoost 5 GHz, process technology 14 nm, UHD Graphics 630, integrated graphics, multithreading, TDP 65 W, memory RAM: maximum 128 GB, DDR4 2666 MHz
Intel LGA 1151 v2, cores 4, threads 4, 3.2 GHz, process technology 14 nm, UHD Graphics 630, integrated graphics, TDP 35 W, memory RAM: maximum 64 GB, DDR4 2400 MHz
Intel LGA 1151 v2, cores 2, threads 4, 3.3 GHz, process technology 14 nm, UHD Graphics 630, integrated graphics, multithreading, TDP 35 W, memory RAM: maximum 64 GB, DDR4 2400 MHz
Intel LGA 1151 v2, cores 4, threads 4, 3.1 GHz, TurboBoost 3.7 GHz, process technology 14 nm, UHD Graphics 630, integrated graphics, TDP 35 W, memory RAM: maximum 64 GB, DDR4 2400 MHz
Intel LGA 1200, 65 / 125 W, cores 8 , threads 16 threads, process technology 14 nm, 2.5 / 3.6 GHz, TurboBoost 4.9 / 5 GHz, maximum 128 GB, DDR4 3200 MHz, - / UHD Graphics 750
AMD AM4, 65 W, cores 8 , threads 16 threads, process technology 7 nm, 3.7 / 3.8 GHz, TurboBoost 4.6 GHz, DDR4 3200 MHz, - / Radeon Vega 8
AMD AM4, 65 W, cores 6 , threads 12 threads, process technology 7 nm, 3.6 / 3.9 GHz, TurboBoost 4.2 - 4.6 GHz, maximum - / 128 GB, DDR4 3200 MHz
Intel LGA 1700, 65 / 125 W, cores 10 / 14 , 6P+4E, 6P+8E, threads 16 / 20 threads, process technology 10 nm, maximum 128 GB, DDR4 3200 MHz, DDR5 4800 / 5600 MHz
AMD AM5, 65 - 120 W, cores 8 , threads 16 threads, process technology 5 nm, 3.8 - 4.5 GHz, TurboBoost 4.5 - 5.4 GHz, maximum 128 GB, DDR5 5200 MHz, Radeon