Ryzen 9 9950X vs Xeon D-1521

Primary details

Comparing Xeon D-1521 and Ryzen 9 9950X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1507	59
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.40	61.82
Market segment	Server	Desktop processor
Series	Intel Xeon D	no data
Power efficiency	7.53	23.26
Architecture codename	Broadwell (2015−2019)	Granite Ridge (2024)
Release date	1 November 2015 (9 years ago)	15 August 2024 (less than a year ago)
Launch price (MSRP)	$199	$649

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 9950X has 2476% better value for money than Xeon D-1521.

Detailed specifications

Xeon D-1521 and Ryzen 9 9950X 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)	16 (Hexadeca-Core)
Threads	8	32
Base clock speed	2.4 GHz	4.3 GHz
Boost clock speed	2.7 GHz	5.7 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)	64 MB (shared)
Chip lithography	14 nm	4 nm
Die size	246.24 mm2	2x 70.6 mm2
Maximum core temperature	no data	95 °C
Maximum case temperature (TCase)	80 °C	no data
Number of transistors	3,200 million	16,630 million
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	-	+

Compatibility

Information on Xeon D-1521 and Ryzen 9 9950X 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	FCBGA1667	AM5
Power consumption (TDP)	45 Watt	170 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon D-1521 and Ryzen 9 9950X. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	SMT, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A
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 Ryzen 9 9950X 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 Ryzen 9 9950X 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 Ryzen 9 9950X. 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

AMD Radeon Graphics

Peripherals

Specifications and connection of peripherals supported by Xeon D-1521 and Ryzen 9 9950X.

PCIe version	2.0/3.0	5.0
PCI Express lanes	24	24
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

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	3.58	41.79
Recency	1 November 2015	15 August 2024
Physical cores	4	16
Threads	8	32
Chip lithography	14 nm	4 nm
Power consumption (TDP)	45 Watt	170 Watt

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Should you still have questions on choice between Xeon D-1521 and Ryzen 9 9950X, ask them in Comments section, and we shall answer.

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