Xeon E5-4660 v4 vs E5-4640

Primary details

Comparing Xeon E5-4640 and Xeon E5-4660 v4 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1331	788
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.29	0.83
Market segment	Server	Server
Series	no data	Intel Xeon E5
Power efficiency	4.39	7.63
Architecture codename	Sandy Bridge-EP (2012)	Broadwell (2015−2019)
Release date	14 May 2012 (12 years ago)	20 June 2016 (8 years ago)
Launch price (MSRP)	$2,730	$4,727

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E5-4660 v4 has 186% better value for money than Xeon E5-4640.

Detailed specifications

Xeon E5-4640 and Xeon E5-4660 v4 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	8 (Octa-Core)	16 (Hexadeca-Core)
Threads	16	32
Base clock speed	2.4 GHz	2.2 GHz
Boost clock speed	2.8 GHz	3 GHz
Bus type	no data	QPI
Bus rate	8 GT/s	2 × 9.6 GT/s
Multiplier	no data	22
L1 cache	64 KB (per core)	no data
L2 cache	256 KB (per core)	4 MB
L3 cache	20480 KB (shared)	40 MB
Chip lithography	32 nm	14 nm
Die size	435 mm2	456.12 mm2
Maximum core temperature	no data	83 °C
Number of transistors	2,270 million	7200 Million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-4640 and Xeon E5-4660 v4 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 (Multiprocessor)
Socket	FCLGA2011	FCLGA2011
Power consumption (TDP)	95 Watt	120 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-4640 and Xeon E5-4660 v4. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX	Intel® AVX2
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	-	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	-
Demand Based Switching	+	no data
PAE	no data	46 Bit

Security technologies

Xeon E5-4640 and Xeon E5-4660 v4 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	no data	+
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-4640 and Xeon E5-4660 v4 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-4640 and Xeon E5-4660 v4. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4
Maximum memory size	384 GB	1.5 TB
Max memory channels	4	4
Maximum memory bandwidth	51.2 GB/s	68 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Xeon E5-4640 and Xeon E5-4660 v4.

PCIe version	3.0	3.0
PCI Express lanes	40	40

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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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	4.41	9.68
Recency	14 May 2012	20 June 2016
Physical cores	8	16
Threads	16	32
Chip lithography	32 nm	14 nm
Power consumption (TDP)	95 Watt	120 Watt

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Should you still have questions on choice between Xeon E5-4640 and Xeon E5-4660 v4, ask them in Comments section, and we shall answer.

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