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Intel Core i5-8400 desktop processor in green PCB with silver heat spreader and gold contact pads

Intel

Intel Core i5-8400 BX80684I58400 desktop processor

SKU CH-E8SA-KBXYC

Six-core desktop CPU running at 2.8 GHz with 4.0 GHz turbo, 9 MB L3 cache, 65 W TDP, LGA 1151 socket and Intel UHD Graphics 630

  • Processors TypeDesktop
  • NameCore i5-8400
  • CPU Socket TypeLGA 1151 (300 Series)
  • Core NameCoffee Lake
  • # of Cores6-Core
  • # of Threads6-Threads
  • Six cores handle multi-tasking workloads at 2.8 GHz base frequency
  • Turbo boost reaches 4.0 GHz for burst performance demands
  • 9 MB L3 cache reduces memory latency for large data sets
  • Integrated UHD Graphics 630 drives displays without a discrete card
  • 65 W TDP keeps cooling requirements modest for compact builds

Six-core Coffee Lake desktop processor

The Intel Core i5-8400 is a six-core desktop CPU built on the 14nm Coffee Lake architecture. It operates at a base frequency of 2.8 GHz and can reach a maximum turbo frequency of 4.0 GHz across its six threads. The processor includes 9MB of L3 cache and supports 64-bit instruction sets. It is designed for the LGA 1151 socket on Intel 300 Series motherboards.

65W thermal design with integrated graphics

With a thermal design power of 65W, the i5-8400 is suited for standard cooling solutions in typical desktop chassis. The integrated Intel UHD Graphics 630 runs at a base frequency of 350 MHz, providing display output without a discrete graphics card. This configuration keeps system power draw moderate during everyday workloads and light gaming. Virtualization technology support is included for hardware-assisted virtual machines.

Dual-channel DDR4 memory controller on LGA 1151

The processor’s dual-channel memory controller works with DDR4 modules on compatible Intel 300 Series boards. Installation uses the LGA 1151 socket, which aligns with existing cooler mounting patterns for that platform. The boxed BX80684I58400 package includes the CPU and stock cooler for immediate assembly. Six physical cores without Hyper-Threading deliver predictable performance per thread in multi-tasking scenarios.

Points forts

  • Six cores handle multi-tasking workloads at 2.8 GHz base frequency
  • Turbo boost reaches 4.0 GHz for burst performance demands
  • 9 MB L3 cache reduces memory latency for large data sets
  • Integrated UHD Graphics 630 drives displays without a discrete card
  • 65 W TDP keeps cooling requirements modest for compact builds

Caractéristiques

BrandIntel
Processors TypeDesktop
SeriesCore i5 8th Gen
NameCore i5-8400
ModelBX80684I58400
CPU Socket TypeLGA 1151 (300 Series)
Core NameCoffee Lake
# of Cores6-Core
# of Threads6-Threads
Operating Frequency2.8 GHz
Max Turbo Frequency4.0 GHz
L2 Cache6 x 256KB
L3 Cache9MB
Manufacturing Tech14nm
Instruction Set64-Bit
Hyper-Threading SupportNo
Memory Channel2
Virtualization Technology SupportYes
Integrated GraphicsIntel HD Graphics 630
Graphics Base Frequency350 MHz
Graphics Max Dynamic Frequency1.05 GHz
PCI Express Revision3.0
Max Number of PCI Express Lanes16
Thermal Design Power65W
Cooling DeviceCooling device not included - Processor Only
Operating System SupportedWindows 11

Questions sur cet article

How do I install the Core i5-8400 into an LGA 1151 (300 Series) socket without bending pins?

Align the triangle marker on the processor with the socket key, lower it gently without force, close the retention lever fully, then attach the supplied cooler using the pre-applied thermal paste and the four push-pin mounts in a diagonal sequence.

What component will need replacement first during long-term ownership of the i5-8400?

The bundled air cooler's fan is the only moving part; expect to replace it when noise increases or speeds drop, while the processor itself has no serviceable items.

Which limit appears first when the i5-8400 runs at 4.0 GHz Turbo across all six cores?

The 65 W power envelope caps sustained all-core turbo, so the processor will throttle back toward 2.8 GHz once the cooler saturates.

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