EPYC 9455 vs Xeon D-1521

Primary details

Comparing Xeon D-1521 and EPYC 9455 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1509	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.40	no data
Market segment	Server	Server
Series	Intel Xeon D	no data
Power efficiency	7.53	no data
Architecture codename	Broadwell (2015−2019)	Turin (2024)
Release date	1 November 2015 (9 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$199	$5,412

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon D-1521 and EPYC 9455 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)	48 (Octatetraconta-Core)
Threads	8	96
Base clock speed	2.4 GHz	3.15 GHz
Boost clock speed	2.7 GHz	4.4 GHz
Bus type	DMI 2.0	no data
Multiplier	24	no data
L1 cache	64K (per core)	80 KB (per core)
L2 cache	256K (per core)	1 MB (per core)
L3 cache	1.5 MB (per core)	192 MB (shared)
Chip lithography	14 nm	4 nm
Die size	246.24 mm2	6x 70.6 mm2
Maximum case temperature (TCase)	80 °C	no data
Number of transistors	3,200 million	49,890 million
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Xeon D-1521 and EPYC 9455 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)	2
Socket	FCBGA1667	SP5
Power consumption (TDP)	45 Watt	300 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon D-1521 and EPYC 9455. 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
Precision Boost 2	no data	+

Security technologies

Xeon D-1521 and EPYC 9455 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 9455 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 9455. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR3	DDR5
Maximum memory size	128 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	34.124 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 Xeon D-1521 and EPYC 9455.

PCIe version	2.0/3.0	5.0
PCI Express lanes	24	128
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

---

Recency	1 November 2015	10 October 2024
Physical cores	4	48
Threads	8	96
Chip lithography	14 nm	4 nm
Power consumption (TDP)	45 Watt	300 Watt

---

Should you still have questions on choice between Xeon D-1521 and EPYC 9455, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---