Xeon w5-2455X vs i9-12900KS

Primary details

Comparing Core i9-12900KS and Xeon w5-2455X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	175	216
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	62.20
Market segment	Desktop processor	Server
Power efficiency	17.46	11.26
Architecture codename	Alder Lake-S (2022)	Sapphire Rapids (2023−2024)
Release date	5 April 2022 (2 years ago)	15 February 2023 (1 year ago)
Launch price (MSRP)	no data	$1,039

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-12900KS and Xeon w5-2455X 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)	12 (Dodeca-Core)
Threads	24	24
Base clock speed	3.4 GHz	3.2 GHz
Boost clock speed	5.3 GHz	4.6 GHz
L1 cache	80K (per core)	80 KB (per core)
L2 cache	1.25 MB (per core)	2 MB (per core)
L3 cache	30 MB (shared)	30 MB
Chip lithography	Intel 7 nm	Intel 7 nm
Die size	215 mm2	no data
Maximum core temperature	90 °C	no data
Maximum case temperature (TCase)	72 °C	77 °C
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	+

Compatibility

Information on Core i9-12900KS and Xeon w5-2455X 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	FCLGA1700	FCLGA4677
Power consumption (TDP)	150 Watt	200 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-12900KS and Xeon w5-2455X. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i9-12900KS and Xeon w5-2455X technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-12900KS and Xeon w5-2455X are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-12900KS and Xeon w5-2455X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5-4800, DDR4-3200	DDR5-4800
Maximum memory size	128 GB	2 TB
Max memory channels	2	4
Maximum memory bandwidth	76.8 GB/s	no data
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel UHD Graphics 770	N/A
Quick Sync Video	+	-
Clear Video HD	+	no data
Graphics max frequency	1.55 GHz	no data
Execution Units	32	no data

Graphics interfaces

Available interfaces and connections of Core i9-12900KS and Xeon w5-2455X integrated GPUs.

Number of displays supported

4

no data

Graphics image quality

Maximum display resolutions supported by Core i9-12900KS and Xeon w5-2455X integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	4096 x 2160 @ 60Hz	no data
Max resolution over eDP	5120 x 3200 @ 120Hz	no data
Max resolution over DisplayPort	7680 x 4320 @ 60Hz	no data

Graphics API support

APIs supported by Core i9-12900KS and Xeon w5-2455X integrated GPUs, sometimes API versions are included.

DirectX	12	no data
OpenGL	4.5	no data

Peripherals

Specifications and connection of peripherals supported by Core i9-12900KS and Xeon w5-2455X.

PCIe version	5.0 and 4.0	5.0
PCI Express lanes	20	64

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	27.67	23.80
Recency	5 April 2022	15 February 2023
Physical cores	16	12
Power consumption (TDP)	150 Watt	200 Watt

---

Should you still have questions on choice between Core i9-12900KS and Xeon w5-2455X, 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.

---