AMD EPYC 9255

Server CPUAMD

Also called amd epyc 9255, epyc 9255, 9255, epyc-9255

AMDServer CPUZen 5

AMD EPYC server processor on Zen 5, with 24 cores and 48 threads and 128 MB L3 at 200 W TDP and no integrated graphics.

What you need to know

Still a capable EPYC desktop chip.

AMD EPYC 9255 launched in October 10, 2024., It has 24 cores and 48 threads on Zen 5. 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: 1 year old
Upgrade pressure: Low

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 1 year old: Current generation. Launched October 10, 2024. 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. Upgrade pressure is low unless you need a different platform feature.

Where does it sit?

Zen 5 sits on AMD's recent Zen desktop and laptop timeline. Later chips keep the brand and change the core.

Zen 2

Zen 3

Zen 4

Zen 5

Performance context

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

Gaming: Poor fit

Not the job. Use a desktop or workstation part if games are the point.

Productivity: Excellent

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

Multithreaded workloads: Very Good

48 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 if this chip already matches your work.

Upgrade makes more sense if

Your workload is strongly CPU limited
You need a platform this SKU cannot offer
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

AMD EPYC 9255 is built on Zen 5.

AMD EPYC 9255 specifications: Processor
Manufacturer	AMD
Family	EPYC
Architecture	Zen 5
Generation	EPYC 9005 Series
Segment	Server

Cores and threads

AMD EPYC 9255 has 24 cores and 48 threads.

AMD EPYC 9255 specifications: Cores and threads
Cores	24
Threads	48

Clock speeds

Base clock is 3.2 GHz. Boost reaches 4.3 GHz.

AMD EPYC 9255 specifications: Clock speeds
Base frequency	3.2 GHz
Max boost	4.3 GHz

Cache

Cache on this sheet is 128 MB L3.

AMD EPYC 9255 specifications: Cache
L3 cache	128 MB
Total cache	128 MB

Memory

AMD EPYC 9255 specifications: Memory
Supported types	DDR5
Channels	12

Package and power

AMD EPYC 9255 lists 200 W board power.

AMD EPYC 9255 specifications: Package and power
TDP	200 W
PCIe	Revision 5.0

Integrated graphics

AMD EPYC 9255 does not include integrated graphics.

AMD EPYC 9255 specifications: Integrated graphics
Integrated graphics	None

Market

AMD EPYC 9255 launched October 10, 2024.

AMD EPYC 9255 specifications: Market
Launch date	October 10, 2024
Model	9255

Features

AMD EPYC 9255 records 35 instruction sets on this sheet.

AMD EPYC 9255 specifications: Features
Instruction sets	AES-NIAVX-512AVX2AVXFMASHAx86-64-v464-bit (x86-64)BMI1BMI2CLMULF16CPCLMULQDQRDRANDRDSEEDSSE4.1SSE4.2x86-64-v3ABMADXCMPXCHG16BFXSRInvariant TSCLZCNTPOPCNTRDTSCPSSESSE2SSE3SSSE3x86-64-v2XSAVEXSAVEOPTMMXMOVBE
Security	AMD SEVAMD SMEExecute Disable (NX)
Virtualization	AMD SVMAMD-V (Hardware Virtualization)NPT / RVIIOMMU
OS capabilities	Docker / Hyper-V readyLinux KVM readyWindows 11 eligibleAndroid emulator readyWSL2 ready

Independent scores

These are PassMark CPU figures. They are not Feex measurements.

AMD EPYC 9255 specifications: Independent scores
Single-core score	3,655
Multi-core score	76,580
Overall score	16,730
Productivity score	54,894
Creator score	48,698
Engineering score	97,640
Gaming score	30,110
Performance per watt	382.9

Compatibility

Compatibility
Memory	DDR5
Graphics	Requires a discrete GPU. This SKU has no iGPU.

Confirm the platform from the manufacturer sheet before you buy a board for this SKU.

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.
PassMark Software · CPU benchmark page for AMD EPYC 9255

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