Xeon E5-4640 v2 vs E5-4657L v2

Primary details

Comparing Xeon E5-4657L v2 and Xeon E5-4640 v2 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	978	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Server	Server
Power efficiency	6.02	no data
Release date	1 January 2014 (10 years ago)	1 January 2014 (10 years ago)

Detailed specifications

Xeon E5-4657L v2 and Xeon E5-4640 v2 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	12 (Dodeca-Core)	10 (Deca-Core)
Threads	24	20
Base clock speed	2.4 GHz	2.2 GHz
Boost clock speed	2.9 GHz	2.7 GHz
Bus rate	8 GT/s	8 GT/s
L3 cache	30 MB Intel® Smart Cache	20 MB Intel® Smart Cache
Chip lithography	22 nm	22 nm
Maximum core temperature	81 °C	75 °C
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-4657L v2 and Xeon E5-4640 v2 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	4	4
Socket	FCLGA2011	FCLGA2011
Power consumption (TDP)	115 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-4657L v2 and Xeon E5-4640 v2. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX	Intel® AVX
AES-NI	+	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	+	+
Demand Based Switching	+	+
PAE	46 Bit	46 Bit

Security technologies

Xeon E5-4657L v2 and Xeon E5-4640 v2 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	+
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-4657L v2 and Xeon E5-4640 v2 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-4657L v2 and Xeon E5-4640 v2. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3-800, DDR3-1066, DDR3-1333, DDR3-1600, DDR3-1866	DDR3-800, DDR3-1066, DDR3-1333, DDR3-1600, DDR3-1866
Maximum memory size	768 GB	768 GB
Max memory channels	4	4
Maximum memory bandwidth	59.7 GB/s	59.7 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Xeon E5-4657L v2 and Xeon E5-4640 v2.

PCIe version	3.0	3.0
PCI Express lanes	40	40

Pros & cons summary

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Physical cores	12	10
Threads	24	20
Power consumption (TDP)	115 Watt	95 Watt

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Should you still have questions on choice between Xeon E5-4657L v2 and Xeon E5-4640 v2, ask them in Comments section, and we shall answer.

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