Celeron E3400 vs Pentium D 840

Primary details

Comparing Pentium D 840 and Celeron E3400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	2852
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	3.72
Market segment	Desktop processor	Desktop processor
Power efficiency	no data	0.78
Architecture codename	Smithfield (2005)	Wolfdale (2008−2010)
Release date	May 2005 (19 years ago)	17 January 2010 (14 years ago)
Launch price (MSRP)	no data	$76

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium D 840 and Celeron E3400 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	2 (Dual-core)	2 (Dual-core)
Threads	2	2
Base clock speed	3.2 GHz	2.6 GHz
Boost clock speed	3.2 GHz	2.6 GHz
L1 cache	28 KB	64 KB (per core)
L2 cache	2 MB	1 MB (shared)
L3 cache	0 KB	0 KB
Chip lithography	90 nm	45 nm
Die size	206 mm2	82 mm2
Maximum core temperature	70 °C	74 °C
Number of transistors	169 million	228 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	1.2V-1.4V	0.85V-1.3625V

Compatibility

Information on Pentium D 840 and Celeron E3400 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	2	1
Socket	PLGA775	LGA775
Power consumption (TDP)	130 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 840 and Celeron E3400. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	-
Idle States	+	+
Thermal Monitoring	-	+
Demand Based Switching	-	no data
PAE	32 Bit	no data
FSB parity	-	no data

Security technologies

Pentium D 840 and Celeron E3400 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 840 and Celeron E3400 are enumerated here.

VT-d	-	-
VT-x	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 840 and Celeron E3400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR1, DDR2, DDR3

Peripherals

Specifications and connection of peripherals supported by Pentium D 840 and Celeron E3400.

PCIe version

no data

2.0

Pros & cons summary

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Chip lithography	90 nm	45 nm
Power consumption (TDP)	130 Watt	65 Watt

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