Ryzen Threadripper PRO 3975WX vs Xeon D-1521

Primary details

Comparing Xeon D-1521 and Ryzen Threadripper PRO 3975WX processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1420	58
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.15	18.22
Market segment	Server	Desktop processor
Series	Intel Xeon D	AMD Ryzen Threadripper
Architecture codename	Broadwell (2015−2019)	Matisse (2019−2020)
Release date	1 November 2015 (8 years ago)	14 July 2020 (3 years ago)
Launch price (MSRP)	$199	no data
Current price	$2202 (11.1x MSRP)	$2200

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen Threadripper PRO 3975WX has 12047% better value for money than Xeon D-1521.

Detailed specifications

Xeon D-1521 and Ryzen Threadripper PRO 3975WX 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)	32 (Dotriaconta-Core)
Threads	8	64
Base clock speed	2.4 GHz	3.5 GHz
Boost clock speed	2.7 GHz	4.2 GHz
L1 cache	64K (per core)	64K (per core)
L2 cache	256K (per core)	512K (per core)
L3 cache	1.5 MB (per core)	128 MB
Chip lithography	14 nm	7 nm
Die size	246.24 mm2	74 mm2
Maximum core temperature	no data	95 °C
Maximum case temperature (TCase)	80 °C	95 °C
Number of transistors	3,200 million	3,800 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	No	Yes

Compatibility

Information on Xeon D-1521 and Ryzen Threadripper PRO 3975WX 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
Socket	FCBGA1667	sWRX8
Power consumption (TDP)	45 Watt	280 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon D-1521 and Ryzen Threadripper PRO 3975WX. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AES, AVX, AVX2, BMI1, BMI2, SHA, F16C, FMA3, AMD64, EVP, AMD-V, SMAP, SMEP, SMT, Precision Boost 2, XFR 2
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	no data
Idle States	+	no data
Thermal Monitoring	+	no data
GPIO	+	no data
Status	Launched	no data

Security technologies

Xeon D-1521 and Ryzen Threadripper PRO 3975WX 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 Threadripper PRO 3975WX 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 Xeon D-1521 and Ryzen Threadripper PRO 3975WX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR3	DDR4-3200
Maximum memory size	128 GB	2 TiB
Max memory channels	2	no data
Maximum memory bandwidth	34.124 GB/s	204.8 GB/s
ECC memory support	+	no data

Peripherals

Specifications and connection of peripherals supported by Xeon D-1521 and Ryzen Threadripper PRO 3975WX.

PCIe version	2.0/3.0	4.0
PCI Express lanes	32	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

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

---

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.

Ryzen Threadripper PRO 3975WX outperforms Xeon D-1521 by 1002% based on our aggregate benchmark results.

---

Pros & cons summary

---

Performance score	3.68	40.55
Recency	1 November 2015	14 July 2020
Physical cores	4	32
Threads	8	64
Chip lithography	14 nm	7 nm
Power consumption (TDP)	45 Watt	280 Watt

---

Should you still have questions on choice between Xeon D-1521 and Ryzen Threadripper PRO 3975WX, 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.

---