EPYC 9645 vs Celeron 420

Primary details

Comparing Celeron 420 and EPYC 9645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	3309	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Power efficiency	0.41	no data
Architecture codename	Conroe-L (2007−2008)	Turin (2024)
Release date	June 2007 (17 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$23	$11,048

Detailed specifications

Celeron 420 and EPYC 9645 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)	96
Threads	1	192
Base clock speed	1.6 GHz	2.3 GHz
Boost clock speed	1.6 GHz	3.7 GHz
L1 cache	64 KB	80 KB (per core)
L2 cache	512 KB	1 MB (per core)
L3 cache	0 KB	256 MB (shared)
Chip lithography	65 nm	3 nm
Die size	77 mm2	no data
Maximum case temperature (TCase)	60 °C	no data
Number of transistors	105 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
VID voltage range	1V-1.3375V	no data

Compatibility

Information on Celeron 420 and EPYC 9645 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	SP5
Power consumption (TDP)	35 Watt	320 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron 420 and EPYC 9645. 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
Precision Boost 2	no data	+

Security technologies

Celeron 420 and EPYC 9645 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 9645 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 9645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR5

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 9645.

PCIe version	no data	5.0
PCI Express lanes	no data	128

Pros & cons summary

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Physical cores	1	96
Threads	1	192
Chip lithography	65 nm	3 nm
Power consumption (TDP)	35 Watt	320 Watt

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