EPYC Embedded 3251 vs Xeon D-1521

Primary details

Comparing Xeon D-1521 and EPYC Embedded 3251 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1501	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.46	no data
Market segment	Server	Server
Series	Intel Xeon D	AMD EPYC Embedded
Power efficiency	7.54	no data
Architecture codename	Broadwell (2015−2019)	Zen (2017−2020)
Release date	1 November 2015 (9 years ago)	21 February 2018 (6 years ago)
Launch price (MSRP)	$199	$315

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon D-1521 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	4 (Quad-Core)	8 (Octa-Core)
Threads	8	16
Base clock speed	2.4 GHz	2.5 GHz
Boost clock speed	2.7 GHz	2.5 GHz
Bus type	DMI 2.0	no data
Multiplier	24	25
L1 cache	256 KB	768 KB
L2 cache	1 MB	4 MB
L3 cache	6 MB	16 MB (shared)
Chip lithography	14 nm	14 nm
Die size	246.24 mm2	213 mm2
Maximum case temperature (TCase)	80 °C	no data
Number of transistors	3200 Million	4800 Million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	-	+

Compatibility

Information on Xeon D-1521 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 (Uniprocessor)	1 (Uniprocessor)
Socket	FCBGA1667	TR4
Power consumption (TDP)	45 Watt	55 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon D-1521 and EPYC Embedded 3251. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	no data
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	-
Idle States	+	no data
Thermal Monitoring	+	-
GPIO	+	no data

Security technologies

Xeon D-1521 and EPYC Embedded 3251 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data
Secure Key	+	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon D-1521 and EPYC Embedded 3251 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon D-1521 and EPYC Embedded 3251. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR3	DDR4 Eight-channel
Maximum memory size	128 GB	512 GB
Max memory channels	2	2
Maximum memory bandwidth	34.124 GB/s	42.671 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Xeon D-1521 and EPYC Embedded 3251.

PCIe version	2.0/3.0	no data
PCI Express lanes	24	no data
USB revision	2.0/3.0	no data
Total number of SATA ports	6	no data
Number of USB ports	8	no data
Integrated LAN	+	no data
UART	+	no data

Pros & cons summary

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Recency	1 November 2015	21 February 2018
Physical cores	4	8
Threads	8	16
Power consumption (TDP)	45 Watt	55 Watt

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Should you still have questions on choice between Xeon D-1521 and EPYC Embedded 3251, ask them in Comments section, and we shall answer.

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