EPYC Embedded 3251 vs Atom C3955

Primary details

Comparing Atom C3955 and EPYC Embedded 3251 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1400	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.76	no data
Market segment	Server	Server
Series	Intel Atom	AMD EPYC Embedded
Architecture codename	Goldmont (2016−2017)	Zen (2017−2020)
Release date	15 August 2017 (6 years ago)	21 February 2018 (6 years ago)
Launch price (MSRP)	$434	$315
Current price	$850 (2x MSRP)	$858 (2.7x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Atom C3955 and EPYC Embedded 3251 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	16 (Hexadeca-Core)	8 (Octa-Core)
Threads	16	16
Base clock speed	2.1 GHz	2.5 GHz
Boost clock speed	2.4 GHz	3.1 GHz
L1 cache	896 KB	96K (per core)
L2 cache	16 MB	512K (per core)
L3 cache	16 MB	16 MB (shared)
Chip lithography	14 nm	14 nm
Die size	no data	192 mm2
Maximum core temperature	78 °C	no data
Number of transistors	no data	4,800 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	Yes

Compatibility

Information on Atom C3955 and EPYC Embedded 3251 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	1 (Uniprocessor)
Socket	FCBGA1310	TR4
Power consumption (TDP)	32 Watt	50 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Atom C3955 and EPYC Embedded 3251. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	no data	+
Enhanced SpeedStep (EIST)	+	no data
QuickAssist	-	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	-	no data
Status	Launched	no data

Security technologies

Atom C3955 and EPYC Embedded 3251 technologies aimed at improving security, for example, by protecting against hacks.

EDB	+	no data
Secure Boot	+	no data
Secure Key	+	no data
SGX	-	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Atom C3955 and EPYC Embedded 3251 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Atom C3955 and EPYC Embedded 3251. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4: 2400	DDR4 Eight-channel
Maximum memory size	256 GB	512 GB
Max memory channels	2	2
Maximum memory bandwidth	38.397 GB/s	42.671 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Atom C3955 and EPYC Embedded 3251.

PCIe version	3	no data
PCI Express lanes	16	no data
USB revision	3	no data
Total number of SATA ports	16	no data
Max number of SATA 6 Gb/s Ports	16	no data
Number of USB ports	8	no data
Integrated LAN	4x10/2.5/1 GBE	no data

Pros & cons summary

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Recency	15 August 2017	21 February 2018
Physical cores	16	8
Cost	$434	$315
Power consumption (TDP)	32 Watt	50 Watt

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Should you still have questions on choice between Atom C3955 and EPYC Embedded 3251, ask them in Comments section, and we shall answer.

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