Intel Core 2 Quad Q9400 vs Intel Core2 Duo E4400. Specifications, performance, tests

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

• Segment
  Desktop Desktop
• Family
  Intel Core2 Duo Intel Core2 Duo
• Generation
  2 1
• CPU group
  Intel Core 2 Quad Q8000/Q9000 Intel Core 2 Duo E4000/E6000
• Predecessor
  No No
• Successor
  No No

Basic parameters such as number of cores, number of threads, base and turbo frequency, and cache size. These parameters indirectly tell about the speed of the processor, the higher they are the better.

• Frequency
  2.66 GHz 2.00 GHz
• CPU Cores
  4 2
• Turbo (1 Core)
  No No
• CPU Threads
  4 2
• Turbo (2 Cores)
  No turbo No turbo
• Hyperthreading
  No No
• Overclocking
  No Yes
• Core architecture
  normal normal

Types, channel quantity of RAM supported by Intel Core2 Duo E4400 and Intel Core 2 Quad Q9400. Depending on the motherboards, higher or lower memory frequencies may be supported.

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

• AES-NI
  No No

Compare the TDP requirements of TDP Intel Core 2 Quad Q9400 and Intel Core2 Duo E4400 to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  95 W 65 W
• TDP up
  No No
• TDP (PL2)
  No No
• TDP down
  No No
• Tjunction max.
  90 °C 70 °C

Architecture, interfaces, additional instructions supported by Intel Core 2 Quad Q9400 and Intel Core 2 Quad Q9400, virtual machine technologies and process technology.

• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• Virtualization
  VT-x, VT-d VT-x
• ISA extensions
  MMX, SSE2, SSE3, SSE4.1 MMX, SSE, SSE2, SSE3
• L2-Cache
  6.00 MB 2.00 MB
• L3-Cache
  No No
• Architecture
  Yorkfield Conroe
• Technology
  45 nm 65 nm
• Socket
  LGA 775 LGA 775
• Release date
  Q3/2008 Q3/2007