Ultra 9 285K vs Xeon W-11855M

Primary details

Comparing Xeon W-11855M and Core Ultra 9 285K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	681	50
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	70.90
Market segment	Server	Desktop processor
Series	Intel Tiger Lake	no data
Power efficiency	30.88	32.79
Architecture codename	Tiger Lake-H (2021)	Arrow Lake-S (2024−2025)
Release date	11 May 2021 (3 years ago)	24 October 2024 (less than a year ago)
Launch price (MSRP)	no data	$589

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon W-11855M and Core Ultra 9 285K 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	6 (Hexa-Core)	24 (Tetracosa-Core)
Threads	12	24
Base clock speed	3.2 GHz	3.7 GHz
Boost clock speed	4.9 GHz	5.7 GHz
Bus rate	8 GT/s	250 MHz
L1 cache	96K (per core)	112 KB (per core)
L2 cache	1.25 MB (per core)	3 MB (per core)
L3 cache	18 MB (shared)	36 MB (shared)
Chip lithography	10 nm SuperFin	3 nm
Die size	no data	243 mm2
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	72 °C	no data
Number of transistors	no data	17,800 million
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	-	+

Compatibility

Information on Xeon W-11855M and Core Ultra 9 285K 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	FCBGA1787	1851
Power consumption (TDP)	35 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon W-11855M and Core Ultra 9 285K. You'll probably need this information if you require some particular technology.

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

Security technologies

Xeon W-11855M and Core Ultra 9 285K technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon W-11855M and Core Ultra 9 285K are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon W-11855M and Core Ultra 9 285K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR5 Depends on motherboard
Maximum memory size	128 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	51.2 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® UHD Graphics for 11th Gen Intel® Processors	Arc Xe-LPG Graphics 64EU
Quick Sync Video	+	-
Graphics max frequency	1.45 GHz	no data
Execution Units	32	no data

Graphics interfaces

Available interfaces and connections of Xeon W-11855M and Core Ultra 9 285K integrated GPUs.

Number of displays supported

4

no data

Graphics image quality

Maximum display resolutions supported by Xeon W-11855M and Core Ultra 9 285K integrated GPUs, including resolutions over different interfaces.

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

Graphics API support

APIs supported by Xeon W-11855M and Core Ultra 9 285K integrated GPUs, sometimes API versions are included.

DirectX	12.1	no data
OpenGL	4.6	no data

Peripherals

Specifications and connection of peripherals supported by Xeon W-11855M and Core Ultra 9 285K.

PCIe version	4.0	5.0
PCI Express lanes	20	20

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	11.42	43.31
Recency	11 May 2021	24 October 2024
Physical cores	6	24
Threads	12	24
Chip lithography	10 nm	3 nm
Power consumption (TDP)	35 Watt	125 Watt

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Should you still have questions on choice between Xeon W-11855M and Core Ultra 9 285K, ask them in Comments section, and we shall answer.

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