EPYC 7643 vs i5-8420

Primary details

Comparing Core i5-8420 and EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	39
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	6.37
Market segment	Desktop processor	Server
Series	Intel Core i5	AMD EPYC
Power efficiency	no data	20.14
Architecture codename	Coffee Lake (2017−2019)	Milan (2021−2023)
Release date	1 September 2018 (6 years ago)	15 March 2021 (3 years ago)
Launch price (MSRP)	no data	$4,995

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i5-8420 and EPYC 7643 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)	48 (Octatetraconta-Core)
Threads	6	96
Base clock speed	2.9 GHz	2.3 GHz
Boost clock speed	4.1 GHz	3.6 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	no data	23
L1 cache	64K (per core)	64 KB (per core)
L2 cache	256K (per core)	512 KB (per core)
L3 cache	9 MB (shared)	256 MB (shared)
Chip lithography	14 nm	7 nm+
Die size	126 mm2	8x 81 mm2
Maximum case temperature (TCase)	72 °C	no data
Number of transistors	no data	33,200 million
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Core i5-8420 and EPYC 7643 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	1 (Uniprocessor)	2
Socket	1151	SP3
Power consumption (TDP)	65 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8420 and EPYC 7643. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-8420 and EPYC 7643 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-8420 and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Dual-channel	DDR4-3200
Maximum memory size	64 GB	4 TiB
Max memory channels	2	no data
Maximum memory bandwidth	42.671 GB/s	204.795 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

Intel UHD Graphics 630

N/A

Peripherals

Specifications and connection of peripherals supported by Core i5-8420 and EPYC 7643.

PCIe version	3.0	4.0
PCI Express lanes	no data	128

Pros & cons summary

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Recency	1 September 2018	15 March 2021
Physical cores	6	48
Threads	6	96
Chip lithography	14 nm	7 nm
Power consumption (TDP)	65 Watt	225 Watt

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