Xeon E5-4640 v2 vs EPYC 7642

Primary details

Comparing EPYC 7642 and Xeon E5-4640 v2 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	91	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	5.26	no data
Market segment	Server	Server
Series	AMD EPYC	no data
Power efficiency	15.56	no data
Architecture codename	Zen 2 (2017−2020)	no data
Release date	7 August 2019 (5 years ago)	1 January 2014 (10 years ago)
Launch price (MSRP)	$4,775	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7642 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	48 (Octatetraconta-Core)	10 (Deca-Core)
Threads	96	20
Base clock speed	2.4 GHz	2.2 GHz
Boost clock speed	3.3 GHz	2.7 GHz
Bus rate	no data	8 GT/s
Multiplier	23	no data
L1 cache	3 MB	no data
L2 cache	24 MB	no data
L3 cache	256 MB (shared)	20 MB Intel® Smart Cache
Chip lithography	7 nm, 14 nm	22 nm
Die size	192 mm2	no data
Maximum core temperature	no data	75 °C
Number of transistors	4,800 million	no data
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	+	-

Compatibility

Information on EPYC 7642 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	2 (Multiprocessor)	4
Socket	TR4	FCLGA2011
Power consumption (TDP)	225 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7642 and Xeon E5-4640 v2. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® AVX
AES-NI	+	+
AVX	+	-
Enhanced SpeedStep (EIST)	no data	+
Turbo Boost Technology	no data	2.0
Hyper-Threading Technology	no data	+
Idle States	no data	+
Thermal Monitoring	-	+
Demand Based Switching	no data	+
PAE	no data	46 Bit
Precision Boost 2	+	no data

Security technologies

EPYC 7642 and Xeon E5-4640 v2 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7642 and Xeon E5-4640 v2 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7642 and Xeon E5-4640 v2. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR3-800, DDR3-1066, DDR3-1333, DDR3-1600, DDR3-1866
Maximum memory size	4 TiB	768 GB
Max memory channels	8	4
Maximum memory bandwidth	204.763 GB/s	59.7 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by EPYC 7642 and Xeon E5-4640 v2.

PCIe version	no data	3.0
PCI Express lanes	no data	40

Pros & cons summary

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Recency	7 August 2019	1 January 2014
Physical cores	48	10
Threads	96	20
Chip lithography	7 nm	22 nm
Power consumption (TDP)	225 Watt	95 Watt

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