Intel Xeon w5-2455X

Workstation CPUIntel

Also called intel xeon w5-2455x, xeon w5-2455x, w5-2455x, xeon-w5-2455x

IntelWorkstation CPUSapphire Rapids

Intel Xeon W workstation processor on Sapphire Rapids, with 12 cores and 24 threads and 30 MB L3 at 200 W TDP addressing up to 2 GB and no integrated graphics.

What you need to know

Still a capable Xeon W desktop chip.

Intel Xeon w5-2455X launched in January 1, 2023., It has 12 cores and 24 threads on Sapphire Rapids, dropping into the FCLGA4677 socket. It is no longer the newest SKU in every store, but the chip is still useful when the rest of the PC keeps up.

Still good?: Yes, for most work this class is sold for
Product age: 3 years old
Upgrade pressure: Low to moderate

Feex says

This SKU has no picture of its own. If the machine has no discrete GPU, a black screen after install is expected, not a dead CPU.

What this hardware means today

Age and usefulness are not the same number. This page keeps them separate.

Performance today: Excellent. Excellent for the class when RAM, storage, and the GPU keep up.
Product age 3 years old: Previous generation. Launched January 1, 2023. Newer platforms exist. That does not make this chip unusable by itself.
Support status: Supported. Current Windows and current applications still run on this class of CPU. Platform BIOS support depends on the motherboard or laptop vendor.
Upgrade pressure: Low to moderate. Upgrade pressure comes from platform features and specific CPU-bound work, not from the chip being unusable.

Where does it sit?

Sapphire Rapids sits on Intel's recent Core timeline. Later desktop branding moved toward Core Ultra.

11th Gen

12th Gen

13th Gen

14th Gen

Core Ultra

Performance context

These are qualitative readings, not a fake 8.7 out of 10. Workload still wins.

Gaming: Very Good

Plenty for current games when the GPU is the limit, which it often is.

Productivity: Excellent

12 cores cover office, browser, and compile work in this class.

Multithreaded workloads: Very Good

24 threads. Heavy encodes still scale further on higher-core parts.

General use: Excellent

Everyday Windows use is not where most people notice this SKU first.

Efficiency: Average

Rated 200 W base power. That is a platform number, not a promise about your cooler.

Should you upgrade?

Probably not based on CPU performance alone.

Upgrade makes more sense if

Your workload is strongly CPU limited
You need a newer platform for memory, I/O, or chipset features
You need substantially more multicore performance
You need newer connectivity that your current board cannot offer

Upgrade makes less sense if

The GPU is the real bottleneck
Current applications are already responsive
The CPU rarely limits your workload

Specifications

Figures below follow the Feex Hardware Database record for this SKU. Fields without a recorded value are omitted.

Processor

Intel Xeon w5-2455X is built on Sapphire Rapids.

Intel Xeon w5-2455X specifications: Processor
Manufacturer	Intel
Family	Xeon W
Architecture	Sapphire Rapids
Generation	Intel Xeon W Processor
Segment	Workstation

Cores and threads

Intel Xeon w5-2455X has 12 cores and 24 threads.

Intel Xeon w5-2455X specifications: Cores and threads
Cores	12
P-cores	12
Threads	24
Hybrid architecture	No

Clock speeds

Base clock is 3.2 GHz. Boost reaches 4.6 GHz.

Intel Xeon w5-2455X specifications: Clock speeds
Base frequency	3.2 GHz
Max boost	4.6 GHz

Cache

Cache on this sheet is 30 MB L3.

Intel Xeon w5-2455X specifications: Cache
L3 cache	30 MB
Total cache	30 MB

Memory

Intel Xeon w5-2455X addresses 2 GB across 4 memory channels.

Intel Xeon w5-2455X specifications: Memory
Supported types	DDR5
Max capacity	2 GB
Channels	4

Package and power

Intel Xeon w5-2455X uses the FCLGA4677 socket and a 200 W TDP.

Intel Xeon w5-2455X specifications: Package and power
Socket	FCLGA4677
TDP	200 W
PCIe	Revision 5.0, 64 lanes

Integrated graphics

Intel Xeon w5-2455X does not include integrated graphics.

Intel Xeon w5-2455X specifications: Integrated graphics
Integrated graphics	None

Market

Intel Xeon w5-2455X launched January 1, 2023 at USD 1143 (suggested price at launch).

Intel Xeon w5-2455X specifications: Market
Launch date	January 1, 2023
Launch MSRP	USD 1143 (suggested price at launch)
Model	w5-2455X

Features

Intel Xeon w5-2455X records 10 instruction sets on this sheet.

Intel Xeon w5-2455X specifications: Features
Instruction sets	AES-NIAMXAVX-512AVX2AVXFMASHA64-bit (x86-64)SSE4.1SSE4.2
Security	Control-flow Enforcement (CET)Execute Disable (NX)Boot GuardOS GuardSGXTrusted ExecutionMode-Based Execute Control
Virtualization	Extended Page Tables (EPT)VT-d (DMA Remapping)VT-x (Hardware Virtualization)

Compatibility

Compatibility
Socket	FCLGA4677
Board	A shared socket is not automatic compatibility. Check the motherboard CPU list and BIOS revision.
Memory	DDR5, up to 2 GB
Graphics	Requires a discrete GPU. This SKU has no iGPU.

A shared socket is not automatic compatibility. Boards often need a BIOS update before a newer chip in the same socket will post.

Cooler clearance, VRM quality, and power limits matter as much as the socket name.

Do not expect a display from the motherboard video ports. This SKU has no integrated graphics.

No display after install

This SKU has no integrated graphics. A machine with no discrete GPU will not show a picture. That is expected, not a dead CPU.

Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Partially Verified. How we research.

Feex Hardware Database · Specification source used for this sheet. CC BY 4.0.

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