Athlon X4 840 vs EPYC 7702

Primary details

Comparing EPYC 7702 and Athlon X4 840 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	45	1875
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.87	no data
Market segment	Server	Desktop processor
Series	AMD EPYC	4x Athlon
Power efficiency	20.89	3.04
Architecture codename	Zen 2 (2017−2020)	Kaveri (2014−2015)
Release date	7 August 2019 (5 years ago)	August 2014 (10 years ago)
Launch price (MSRP)	$6,450	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7702 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	64 (Tetrahexaconta-Core)	4 (Quad-Core)
Threads	128	4
Base clock speed	2 GHz	3.1 GHz
Boost clock speed	3.35 GHz	3.8 GHz
Multiplier	20	no data
L1 cache	96K (per core)	256K
L2 cache	512K (per core)	4 MB
L3 cache	256 MB (shared)	no data
Chip lithography	7 nm, 14 nm	28 nm
Die size	192 mm2	245 mm2
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	4,800 million	2,411 million
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	+	+

Compatibility

Information on EPYC 7702 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	TR4	Socket FM2+
Power consumption (TDP)	200 Watt	65 watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7702 and Athlon X4 840. You'll probably need this information if you require some particular technology.

AES-NI	+	+
FMA	-	+
AVX	+	+
Precision Boost 2	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7702 and Athlon X4 840 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7702 and Athlon X4 840. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR3
Maximum memory size	4 TiB	no data
Max memory channels	8	no data
Maximum memory bandwidth	204.763 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by EPYC 7702 and Athlon X4 840.

PCIe version	no data	3.0
PCI Express lanes	no data	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	44.14	2.09
Recency	7 August 2019	on August 2014
Physical cores	64	4
Threads	128	4
Chip lithography	7 nm	28 nm
Power consumption (TDP)	200 Watt	65 Watt

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Should you still have questions on choice between EPYC 7702 and Athlon X4 840, ask them in Comments section, and we shall answer.

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