Pentium 4 2.66 vs Xeon E5440

Primary details

Comparing Xeon E5440 and Pentium 4 2.66 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2137	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Server	Desktop processor
Power efficiency	1.77	no data
Architecture codename	no data	Northwood (2002−2004)
Release date	1 January 2008 (16 years ago)	August 2002 (22 years ago)

Detailed specifications

Xeon E5440 and Pentium 4 2.66 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	no data	1 (Single-Core)
Threads	no data	1
Base clock speed	2.83 GHz	no data
Boost clock speed	no data	2.66 GHz
L1 cache	no data	8 KB
L2 cache	no data	512 KB
L3 cache	12 MB L2 Cache	0 KB
Chip lithography	45 nm	130 nm
Die size	no data	146 mm2
Maximum core temperature	67 °C	no data
Number of transistors	no data	55 million
64 bit support	+	-
Windows 11 compatibility	-	-
VID voltage range	0.85V-1.35V	no data

Compatibility

Information on Xeon E5440 and Pentium 4 2.66 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	no data	1
Socket	LGA771	478
Power consumption (TDP)	80 Watt	110 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5440 and Pentium 4 2.66. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	+	no data
FSB parity	+	no data

Security technologies

Xeon E5440 and Pentium 4 2.66 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5440 and Pentium 4 2.66 are enumerated here.

VT-x	+	no data
EPT	-	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5440 and Pentium 4 2.66. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

no data

DDR1, DDR2

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Pros & cons summary

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Chip lithography	45 nm	130 nm
Power consumption (TDP)	80 Watt	110 Watt

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Should you still have questions on choice between Xeon E5440 and Pentium 4 2.66, ask them in Comments section, and we shall answer.

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