Fujitsu Pentium D 840 vs Fujitsu Pentium IV 660

Key differences

The Fujitsu Pentium IV 660 has 0.4 GHz more processor base frequency than the Fujitsu Pentium D 840 (3.6 GHz vs 3.2 GHz). The Fujitsu Pentium IV 660 has 0.4 GHz more l2 cache speed than the Fujitsu Pentium D 840 (3.6 GHz vs 3.2 GHz). The Fujitsu Pentium D 840 has 15 W more thermal Design Power (TDP) than the Fujitsu Pentium IV 660 (130 W vs 115 W). Processor family: Intel® Pentium® D on the Fujitsu Pentium D 840, Intel® Pentium® 4 on the Fujitsu Pentium IV 660. VID Voltage Range: 1.25 - 1.4 V on the Fujitsu Pentium D 840, 1.287 - 1.400 V on the Fujitsu Pentium IV 660.

• Processor family
  • Pentium D 840:Intel® Pentium® D
  • Pentium IV 660:Intel® Pentium® 4
• Processor base frequency
  • Pentium D 840:3.2 GHz
  • Pentium IV 660:3.6 GHz
• L2 cache speed
  • Pentium D 840:3.2 GHz
  • Pentium IV 660:3.6 GHz
• Thermal Design Power (TDP)
  • Pentium D 840:130 W
  • Pentium IV 660:115 W
• VID Voltage Range
  • Pentium D 840:1.25 - 1.4 V
  • Pentium IV 660:1.287 - 1.400 V
• Stepping
  • Pentium D 840:B0
  • Pentium IV 660:R0
• CPU multiplier (bus/core ratio)
  • Pentium D 840:16
  • Pentium IV 660:18
• Processor code
  • Pentium D 840:SL8CM
  • Pentium IV 660:SL8PZ