Intel Core2 Duo E8400 vs Intel Core 2 Quad Q8400. Specifications, performance, tests

Background information about the processors being compared, series, generation and market segment.

• CPU group
  Intel Core 2 Duo E7000/E8000 Intel Core 2 Quad Q8000/Q9000
• Family
  Intel Core2 Duo Intel Core2 Duo
• Generation
  2 2
• Predecessor
  No No
• Segment
  Desktop Desktop
• Successor
  No No

Core counts, threads, cache and clock modes describe the CPU configuration. Performance depends on the workload and comparable measured results.

• Base Frequency
  3 GHz 2.66 GHz
• Core architecture
  normal normal
• CPU Cores
  2 4
• CPU Threads
  2 4
• Hyperthreading / SMT
  No No
• Overclocking
  Yes No
• Turbo Frequency (1 Core)
  No No
• Turbo Frequency (2 Cores)
  No turbo No turbo

Types, channel quantity of RAM supported by Intel Core 2 Quad Q8400 and Intel Core2 Duo E8400. Depending on the motherboards, higher or lower memory frequencies may be supported.

• ECC
  No No
• Max. Memory
  16 GB 16 GB
• Memory channels
  2 2
• Memory type
  DDR2-1066 / DDR3-1333 DDR2-800 / DDR3-1066

• AES-NI
  No No

Compare the TDP requirements of TDP Intel Core2 Duo E8400 and Intel Core 2 Quad Q8400 Power specifications describe different manufacturer limits. TDP, base power and maximum turbo power are separate values; they do not establish measured system consumption.

• Maximum Operating Temperature
  80 °C 90 °C
• TDP (PL1, legacy label)
  65 W 95 W
• TDP (PL2)
  No No
• TDP down
  No No
• TDP up
  No No

Architecture, interfaces, additional instructions supported by Intel Core2 Duo E8400 and Intel Core 2 Quad Q8400, virtual machine technologies and process technology.

• Architecture
  Wolfdale Yorkfield
• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• ISA extensions
  MMX, SSE, SSE2, SSE3, SSE 4.1 MMX, SSE2, SSE3, SSE4.1
• L2-Cache
  6 MB 4 MB
• L3-Cache
  No No
• Release date
  Q1/2008 Q2/2009
• Socket
  LGA 775 LGA 775
• Technology
  45 nm 45 nm
• Virtualization
  VT-x VT-x, VT-d