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An immediate step up from the Q8300, the Quad Q8400 differs only in its core speed. Like its peer.

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Pros

priced reasonably for the extreme performance attained

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stays fairly cool while in operation

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generally sits at about 4% usage when not running any high-demand applications

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can handle heavy processing loads gracefully with room to spare

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well supported by a wide range of motherboard manufacturers, often has custom areas within the BIOS for maximizing performance

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stable operation at default settings and stays stable when moderately overclocked

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good flexibility with overclocking, can be pushed to even higher speeds

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Edit

 

The Intel Core 2 Quad Q8400 is a 45nm, ‘Yorkfield’ quad-core 2.66GHz microprocessor designed as a competitive solution to AMD’s quad-core processors. An immediate step up from the Q8300, the Quad Q8400 differs only in its core speed. Like its peer, it features a 1333MHz FSB, as well as Intel 64 architecture, Intel Trusted Executed Technology, Execute Disable Bit, and Enhanced Intel SpeedStep Technology. The Q8400 has a smaller die—all cores on one die—and should therefore function as a great overclocker. However, its low multiplier of 7.5 drastically limits the overclocking power of the chip due to its standard FSB.

Features
  • ‘Yorkfield’ Quad-Core
  • Intel 64
  • Intel Trusted Executed Technology
  • Execute Disable Bit
  • Enhanced Intel SpeedStep Technology
  • Intel Wide Dynamic Execution
  • Intel Intelligent Power Capability
  • Intel Smart Memory Access
  • Intel Advanced Smart Cache
  • Intel Advanced Digital Media Boost
Specifications
  • Mfr Part Number: AT80580PJ0604MN
  • Process Type: Intel Core 2 Quad Processor Q8400
  • Frequency: 2.5 GHz
  • FSB: 1333 MHz
  • Cache: 4 MB
  • Process: 45 nm
  • Socket: Socket 775
  • Power Consumption: 95 W
  • Package: OEM
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