EPYC 7643 vs Celeron 420

Primary details

Comparing Celeron 420 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	no data	AMD EPYC
Power efficiency	no data	20.14
Architecture codename	Conroe-L (2007−2008)	Milan (2021−2023)
Release date	June 2007 (17 years ago)	15 March 2021 (3 years ago)
Launch price (MSRP)	$23	$4,995

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Celeron 420 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	1 (Single-Core)	48 (Octatetraconta-Core)
Threads	1	96
Base clock speed	1.6 GHz	2.3 GHz
Boost clock speed	1.6 GHz	3.6 GHz
Multiplier	no data	23
L1 cache	64 KB	64 KB (per core)
L2 cache	512 KB	512 KB (per core)
L3 cache	0 KB	256 MB (shared)
Chip lithography	65 nm	7 nm+
Die size	77 mm2	8x 81 mm2
Maximum case temperature (TCase)	60 °C	no data
Number of transistors	105 million	33,200 million
64 bit support	+	+
Windows 11 compatibility	-	+
VID voltage range	1V-1.3375V	no data

Compatibility

Information on Celeron 420 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	2
Socket	LGA775	SP3
Power consumption (TDP)	35 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron 420 and EPYC 7643. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	-	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
FSB parity	-	no data

Security technologies

Celeron 420 and EPYC 7643 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron 420 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 Celeron 420 and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR4-3200
Maximum memory size	no data	4 TiB
Maximum memory bandwidth	no data	204.795 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Celeron 420 and EPYC 7643.

PCIe version	no data	4.0
PCI Express lanes	no data	128

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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Pros & cons summary

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Physical cores	1	48
Threads	1	96
Chip lithography	65 nm	7 nm
Power consumption (TDP)	35 Watt	225 Watt

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Should you still have questions on choice between Celeron 420 and EPYC 7643, ask them in Comments section, and we shall answer.

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