Xeon W-11855M vs D-1581

Place in the ranking	882	663
Place by popularity	not in top-100	not in top-100
Market segment	Server	Server
Series	Intel Xeon D	Intel Tiger Lake
Architecture codename	Broadwell (2015−2019)	Tiger Lake-H (2021)
Release date	24 February 2016 (8 years ago)	11 May 2021 (3 years ago)

Detailed specifications

Xeon D-1581 and Xeon W-11855M 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	32	12
Base clock speed	1.8 GHz	3.2 GHz
Boost clock speed	2.4 GHz	4.9 GHz
Bus type	DMI 2.0	no data
Bus rate	no data	8 GT/s
Multiplier	18	no data
L1 cache	1 MB	96K (per core)
L2 cache	4 MB	1.25 MB (per core)
L3 cache	24 MB	18 MB (shared)
Chip lithography	14 nm	10 nm SuperFin
Die size	306.18 mm²	no data
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	80 °C	72 °C
Number of transistors	4700 Million	no data
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Xeon D-1581 and Xeon W-11855M 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	FCBGA1787
Power consumption (TDP)	65 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon D-1581 and Xeon W-11855M. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
FMA	-	+
AVX	+	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	+
TSX	+	+
Idle States	+	no data
Thermal Monitoring	+	+
Flex Memory Access	no data	+
SIPP	-	+
GPIO	+	no data
Turbo Boost Max 3.0	no data	+
Status	Launched	Discontinued
Deep Learning Boost	-	+

Security technologies

Xeon D-1581 and Xeon W-11855M technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon D-1581 and Xeon W-11855M are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon D-1581 and Xeon W-11855M. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR3	DDR4
Maximum memory size	128 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	34.124 GB/s	51.2 GB/s
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel® UHD Graphics for 11th Gen Intel® Processors
Quick Sync Video	-	+
Graphics max frequency	no data	1.45 GHz
Execution Units	no data	32

Graphics interfaces

Available interfaces and connections of Xeon D-1581 and Xeon W-11855M integrated GPUs.

Number of displays supported

no data

Graphics image quality

Maximum display resolutions supported by Xeon D-1581 and Xeon W-11855M integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	4096x2304@60Hz
Max resolution over eDP	no data	4096x2304@60Hz
Max resolution over DisplayPort	no data	7680x4320@60Hz

Graphics API support

APIs supported by Xeon D-1581 and Xeon W-11855M integrated GPUs, sometimes API versions are included.

DirectX	no data	12.1
OpenGL	no data	4.6

Peripherals

Specifications and connection of peripherals supported by Xeon D-1581 and Xeon W-11855M.

PCIe version	2.0/3.0	4.0
PCI Express lanes	24	20
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.

Xeon D-1581 8.70

Xeon W-11855M 11.89
+36.7%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Xeon D-1581 13282

Xeon W-11855M 18160
+36.7%

Gaming performance

Pros & cons summary

Performance score	8.70	11.89
Recency	24 February 2016	11 May 2021
Physical cores	16	6
Threads	32	12
Chip lithography	14 nm	10 nm
Power consumption (TDP)	65 Watt	35 Watt

Xeon D-1581 has 166.7% more physical cores and 166.7% more threads.

Xeon W-11855M, on the other hand, has a 36.7% higher aggregate performance score, an age advantage of 5 years, a 40% more advanced lithography process, and 85.7% lower power consumption.

The Xeon W-11855M is our recommended choice as it beats the Xeon D-1581 in performance tests.

Should you still have questions on choice between Xeon D-1581 and Xeon W-11855M, ask them in Comments section, and we shall answer.