Xeon E-2456 vs Atom C3955

Primary details

Comparing Atom C3955 and Xeon E-2456 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1484	469
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.97	92.83
Market segment	Server	Server
Series	Intel Atom	no data
Power efficiency	10.80	17.70
Architecture codename	Goldmont (2016−2017)	Raptor Lake-S (2023−2024)
Release date	15 August 2017 (7 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	$434	$375

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E-2456 has 9470% better value for money than Atom C3955.

Detailed specifications

Atom C3955 and Xeon E-2456 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)	6 (Hexa-Core)
Threads	16	12
Base clock speed	2.1 GHz	3.3 GHz
Boost clock speed	2.4 GHz	5.1 GHz
Bus rate	no data	16 GT/s
Multiplier	21	no data
L1 cache	896 KB	80 KB (per core)
L2 cache	16 MB	1.25 MB (per core)
L3 cache	16 MB	18 MB (shared)
Chip lithography	14 nm	Intel 7 nm
Die size	no data	163 mm2
Maximum core temperature	78 °C	100 °C
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Atom C3955 and Xeon E-2456 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)	1
Socket	FCBGA1310	FCLGA1700
Power consumption (TDP)	32 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Atom C3955 and Xeon E-2456. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
QuickAssist	-	no data
Turbo Boost Technology	2.0	2
Hyper-Threading Technology	-	+
Idle States	no data	+
Thermal Monitoring	-	+
Turbo Boost Max 3.0	no data	-

Security technologies

Atom C3955 and Xeon E-2456 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Atom C3955 and Xeon E-2456 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Atom C3955 and Xeon E-2456. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4: 2400	DDR5-4800
Maximum memory size	256 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	38.397 GB/s	no data
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Atom C3955 and Xeon E-2456.

PCIe version	3	5
PCI Express lanes	16	16
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

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	3.79	15.53
Recency	15 August 2017	14 December 2023
Physical cores	16	6
Threads	16	12
Power consumption (TDP)	32 Watt	80 Watt

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Should you still have questions on choice between Atom C3955 and Xeon E-2456, ask them in Comments section, and we shall answer.

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