Xeon E5503 vs Core 2 Duo E4400

Primary details

Comparing Core 2 Duo E4400 and Xeon E5503 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	2850
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Power efficiency	no data	0.60
Architecture codename	Allendale (2006−2009)	Gainestown (2009−2010)
Release date	July 2007 (17 years ago)	16 March 2010 (14 years ago)
Launch price (MSRP)	no data	$287

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core 2 Duo E4400 and Xeon E5503 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	2 GHz	2 GHz
Boost clock speed	2 GHz	2 GHz
Bus rate	800 MHz	no data
L1 cache	64 KB	64 KB (per core)
L2 cache	2 MB	256 KB (per core)
L3 cache	0 KB	4 MB (shared)
Chip lithography	65 nm	45 nm
Die size	111 mm2	263 mm2
Maximum core temperature	L2=61 °C, M0=73 °C	76 °C
Number of transistors	167 million	731 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	0.85V-1.5V	no data

Compatibility

Information on Core 2 Duo E4400 and Xeon E5503 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	1	2
Socket	LGA775	FCLGA1366
Power consumption (TDP)	65 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo E4400 and Xeon E5503. 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	-	+
PAE	no data	40 Bit
FSB parity	-	no data
Status	Discontinued	Discontinued

Security technologies

Core 2 Duo E4400 and Xeon E5503 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo E4400 and Xeon E5503 are enumerated here.

VT-d	no data	+
VT-x	-	+
EPT	no data	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E4400 and Xeon E5503. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR3
Maximum memory size	no data	144 GB
Max memory channels	no data	3
Maximum memory bandwidth	no data	19.2 GB/s
ECC memory support	-	+

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo E4400 and Xeon E5503.

PCIe version

no data

2.0

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	65 nm	45 nm
Power consumption (TDP)	65 Watt	80 Watt

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Should you still have questions on choice between Core 2 Duo E4400 and Xeon E5503, ask them in Comments section, and we shall answer.

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