i9-12900 vs Xeon W-11855M

Primary details

Comparing Xeon W-11855M and Core i9-12900 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	678	242
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	33.50
Market segment	Server	Desktop processor
Series	Intel Tiger Lake	no data
Power efficiency	30.90	31.42
Architecture codename	Tiger Lake-H (2021)	Alder Lake-S (2022)
Release date	11 May 2021 (3 years ago)	4 January 2022 (2 years ago)
Launch price (MSRP)	no data	$489

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon W-11855M and Core i9-12900 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)	16 (Hexadeca-Core)
Threads	12	24
Base clock speed	3.2 GHz	2.4 GHz
Boost clock speed	4.9 GHz	5.1 GHz
Bus rate	8 GT/s	no data
L1 cache	96K (per core)	80K (per core)
L2 cache	1.25 MB (per core)	1.25 MB (per core)
L3 cache	18 MB (shared)	30 MB (shared)
Chip lithography	10 nm SuperFin	Intel 7 nm
Die size	no data	215 mm2
Maximum core temperature	100 °C	100 °C
Maximum case temperature (TCase)	72 °C	72 °C
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	-	+

Compatibility

Information on Xeon W-11855M and Core i9-12900 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	FCLGA1700
Power consumption (TDP)	35 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon W-11855M and Core i9-12900. 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	+	+
FMA	+	-
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	+
Turbo Boost Technology	no data	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Idle States	no data	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
SIPP	+	+
Turbo Boost Max 3.0	+	+
Deep Learning Boost	+	+

Security technologies

Xeon W-11855M and Core i9-12900 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 W-11855M and Core i9-12900 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon W-11855M and Core i9-12900. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR4, DDR5
Maximum memory size	128 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	51.2 GB/s	76.8 GB/s
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® UHD Graphics for 11th Gen Intel® Processors	Intel UHD Graphics 770
Quick Sync Video	+	+
Clear Video HD	no data	+
Graphics max frequency	1.45 GHz	1.55 GHz
Execution Units	32	32

Graphics interfaces

Available interfaces and connections of Xeon W-11855M and Core i9-12900 integrated GPUs.

Number of displays supported

4

4

Graphics image quality

Maximum display resolutions supported by Xeon W-11855M and Core i9-12900 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	4096x2304@60Hz	4096 x 2160 @ 60Hz
Max resolution over eDP	4096x2304@60Hz	5120 x 3200 @ 120Hz
Max resolution over DisplayPort	7680x4320@60Hz	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Xeon W-11855M and Core i9-12900 integrated GPUs, sometimes API versions are included.

DirectX	12.1	12
OpenGL	4.6	4.5

Peripherals

Specifications and connection of peripherals supported by Xeon W-11855M and Core i9-12900.

PCIe version	4.0	5.0 and 4.0
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.

---

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.

---

Pros & cons summary

---

Performance score	11.86	22.40
Recency	11 May 2021	4 January 2022
Physical cores	6	16
Threads	12	24
Power consumption (TDP)	35 Watt	65 Watt

---

Should you still have questions on choice between Xeon W-11855M and Core i9-12900, 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.

---