Xeon W-10855M vs i9-9940X

Primary details

Comparing Core i9-9940X and Xeon W-10855M processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	350	943
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	5.10	no data
Market segment	Desktop processor	Mobile workstation
Series	Intel Core i9	Intel Comet Lake
Power efficiency	10.10	16.68
Architecture codename	Skylake (server) (2017−2018)	Comet Lake-H (2020)
Release date	19 October 2018 (6 years ago)	13 May 2020 (4 years ago)
Launch price (MSRP)	$1,387	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-9940X and Xeon W-10855M 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	14 (Tetradeca-Core)	6 (Hexa-Core)
Threads	28	12
Base clock speed	3.3 GHz	2.8 GHz
Boost clock speed	4.5 GHz	4.9 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	8 GT/s
Multiplier	33	no data
L1 cache	64 KB (per core)	384 KB
L2 cache	1 MB (per core)	1.5 MB
L3 cache	19.25 MB (shared)	12 MB
Chip lithography	14 nm	14 nm
Die size	484 mm2	no data
Maximum core temperature	88 °C	100 °C
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	-

Compatibility

Information on Core i9-9940X and Xeon W-10855M 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	FCLGA2066	FCBGA1440
Power consumption (TDP)	165 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9940X and Xeon W-10855M. 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	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
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	-	+
Turbo Boost Max 3.0	+	+

Security technologies

Core i9-9940X and Xeon W-10855M technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	+	+
Secure Key	no data	+
Identity Protection	-	+
SGX	no data	Yes with Intel® ME
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9940X and Xeon W-10855M are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9940X and Xeon W-10855M. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR4
Maximum memory size	128 GB	128 GB
Max memory channels	4	2
Maximum memory bandwidth	85.33 GB/s	45.8 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	N/A	Intel UHD Graphics for 10th Gen Intel Processors
Quick Sync Video	-	+
Graphics max frequency	no data	1.2 GHz

Graphics interfaces

Available interfaces and connections of Core i9-9940X and Xeon W-10855M integrated GPUs.

Number of displays supported	no data	3
eDP	no data	+
DisplayPort	-	+
HDMI	-	+
DVI	no data	+

Graphics image quality

Maximum display resolutions supported by Core i9-9940X and Xeon W-10855M integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096x2304@30Hz
Max resolution over eDP	no data	4096x2304@60Hz
Max resolution over DisplayPort	no data	4096x2304@60Hz

Graphics API support

APIs supported by Core i9-9940X and Xeon W-10855M integrated GPUs, sometimes API versions are included.

DirectX	no data	12
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Core i9-9940X and Xeon W-10855M.

PCIe version	3.0	3.0
PCI Express lanes	44	16

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	17.61	7.93
Recency	19 October 2018	13 May 2020
Physical cores	14	6
Threads	28	12
Power consumption (TDP)	165 Watt	45 Watt

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Should you still have questions on choice between Core i9-9940X and Xeon W-10855M, ask them in Comments section, and we shall answer.

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