Athlon X4 840 vs Xeon E5-2643 v4

Primary details

Comparing Xeon E5-2643 v4 and Athlon X4 840 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	997	1873
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.29	no data
Market segment	Server	Desktop processor
Series	Intel Xeon E5	4x Athlon
Power efficiency	4.91	3.04
Architecture codename	Broadwell (2015−2019)	Kaveri (2014−2015)
Release date	20 June 2016 (8 years ago)	August 2014 (10 years ago)
Launch price (MSRP)	$1,552	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2643 v4 and Athlon X4 840 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	6 (Hexa-Core)	4 (Quad-Core)
Threads	12	4
Base clock speed	3.4 GHz	3.1 GHz
Boost clock speed	3.7 GHz	3.8 GHz
Bus type	QPI	no data
Bus rate	2 × 9.6 GT/s	no data
Multiplier	34	no data
L1 cache	no data	256K
L2 cache	1.5 MB	4 MB
L3 cache	20 MB	no data
Chip lithography	14 nm	28 nm
Die size	246.24 mm2	245 mm2
Maximum core temperature	75 °C	no data
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	3200 Million	2,411 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	-	+

Compatibility

Information on Xeon E5-2643 v4 and Athlon X4 840 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)	1
Socket	FCLGA2011	Socket FM2+
Power consumption (TDP)	135 Watt	65 watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2643 v4 and Athlon X4 840. You'll probably need this information if you require some particular technology.

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

Security technologies

Xeon E5-2643 v4 and Athlon X4 840 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 Xeon E5-2643 v4 and Athlon X4 840 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 Xeon E5-2643 v4 and Athlon X4 840. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866, DDR4-2133, DDR4-2400	DDR3
Maximum memory size	1.5 TB	no data
Max memory channels	4	no data
Maximum memory bandwidth	76.8 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2643 v4 and Athlon X4 840.

PCIe version	3.0	3.0
PCI Express lanes	40	16

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	7.14	2.13
Recency	20 June 2016	on August 2014
Physical cores	6	4
Threads	12	4
Chip lithography	14 nm	28 nm
Power consumption (TDP)	135 Watt	65 Watt

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Should you still have questions on choice between Xeon E5-2643 v4 and Athlon X4 840, ask them in Comments section, and we shall answer.

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