Fujitsu Pentium 4 651 vs Fujitsu Pentium D 840

Key differences

The Fujitsu Pentium 4 651 has 0.2 GHz more processor base frequency than the Fujitsu Pentium D 840 (3.4 GHz vs 3.2 GHz). The Fujitsu Pentium D 840 has 25 nm more processor lithography than the Fujitsu Pentium 4 651 (90 nm vs 65 nm). The Fujitsu Pentium 4 651 has 0.2 GHz more l2 cache speed than the Fujitsu Pentium D 840 (3.4 GHz vs 3.2 GHz). Processor family: Intel® Pentium® 4 on the Fujitsu Pentium 4 651, Intel® Pentium® D on the Fujitsu Pentium D 840. VID Voltage Range: 1.200 - 1.325 V on the Fujitsu Pentium 4 651, 1.25 - 1.4 V on the Fujitsu Pentium D 840.

• Processor family
  • Pentium 4 651:Intel® Pentium® 4
  • Pentium D 840:Intel® Pentium® D
• Processor base frequency
  • Pentium 4 651:3.4 GHz
  • Pentium D 840:3.2 GHz
• Processor lithography
  • Pentium 4 651:65 nm
  • Pentium D 840:90 nm
• L2 cache speed
  • Pentium 4 651:3.4 GHz
  • Pentium D 840:3.2 GHz
• Thermal Design Power (TDP)
  • Pentium 4 651:86 W
  • Pentium D 840:130 W
• VID Voltage Range
  • Pentium 4 651:1.200 - 1.325 V
  • Pentium D 840:1.25 - 1.4 V
• Stepping
  • Pentium 4 651:C1
  • Pentium D 840:B0
• CPU multiplier (bus/core ratio)
  • Pentium 4 651:17
  • Pentium D 840:16