Xeon 6756E vs Core 2 Duo E4400

Primary details

Comparing processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	3258	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Power efficiency	0.27	no data
Designer	Intel	Intel
Manufacturer	no data	Intel
Architecture codename	Allendale (2006−2009)	Sierra Forest (2024)
Release date	July 2007 (18 years ago)	3 June 2024 (1 year ago)
Launch price (MSRP)	no data	$8,428

Detailed specifications

Core 2 Duo E4400 and Xeon 6756E 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)	128
Threads	2	128
Base clock speed	2 GHz	1.8 GHz
Boost clock speed	2 GHz	2.6 GHz
Bus rate	800 MHz	no data
L1 cache	64 KB	96 KB (per core)
L2 cache	2 MB	4 MB (per module)
L3 cache	0 KB	96 MB (shared)
Chip lithography	65 nm	Intel 3 nm
Die size	111 mm2	no data
Maximum core temperature	L2=61 °C, M0=73 °C	no data
Maximum case temperature (TCase)	no data	80 °C
Number of transistors	167 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
VID voltage range	0.85V-1.5V	no data

Compatibility

Information on Core 2 Duo E4400 and Xeon 6756E 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	FCLGA4710
Power consumption (TDP)	65 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo E4400 and Xeon 6756E. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® AVX2
AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
TSX	-	+
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
FSB parity	-	no data
Deep Learning Boost	-	+

Security technologies

Core 2 Duo E4400 and Xeon 6756E technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+
SGX	no data	+
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo E4400 and Xeon 6756E are enumerated here.

VT-d	no data	+
VT-x	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E4400 and Xeon 6756E. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR5-6400
Maximum memory size	no data	4 TB
Max memory channels	no data	8
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo E4400 and Xeon 6756E.

PCIe version	no data	5.0
PCI Express lanes	no data	88

Pros & cons summary

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Physical cores	2	128
Threads	2	128
Power consumption (TDP)	65 Watt	225 Watt