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AMD Ryzen 7 H 255

Name: AMD Ryzen 7 H 255
Brand: AMD

AMD Ryzen 7 H 255: what it is and who it’s for

In short: AMD Ryzen 7 H 255 is an 8-core mobile APU from the Hawk Point (Zen 4, 4 nm) family, increasingly found in mini PCs and laptops. It’s essentially close to the Ryzen 7 8745H/8845HS: same CPU configuration and Radeon 780M iGPU, but without an NPU and with slightly different CPU/GPU boost ceilings compared to the Ryzen 7 260.

What this chip is and where it’s used

Ryzen 7 H 255 belongs to the Ryzen 200 lineup (Hawk Point, a refresh of Phoenix) and targets mobile PCs. In practice it most often appears in mini PCs and compact NAS/desktop-class devices from brands like Beelink, Minisforum, and others.

Positioning-wise, H 255 sits “between” Ryzen 7 250 and Ryzen 7 260: all three are 8C/16T Zen 4 parts with Radeon 780M, but H 255 lacks Ryzen AI (NPU), and its base/boost clocks and power limits are closer to the 45-watt class (cTDP 35-54 W). You can think of it as a “slightly simplified” Ryzen 7 260 or a “hotter” Ryzen 7 250 without an NPU.

Key specs (at a glance)

Architecture: Zen 4 (Hawk Point), 4 nm
CPU: 8 cores / 16 threads; advertised boost up to 4.9 GHz
Graphics: Radeon 780M (RDNA 3, 12 CU), clocks up to ~2.6 GHz
Memory: up to DDR5-5600 or LPDDR5X-7500, dual-channel, capacity up to 256 GB (device-dependent)
I/O: up to 20 PCIe 4.0 lanes, up to two USB4 40 Gbps ports, output to up to 4 displays (device-dependent)
Power envelope: default 45 W, cTDP 35-54 W (set by the specific laptop/mini PC)
Ryzen AI (NPU): No / “Not Available”

CPU performance: in the “8745H/8845HS” ballpark

Aggregate synthetic summaries show Ryzen 7 H 255 essentially mirroring 8745H/8845HS results - differences are within a few percent and depend on power limits and the cooling system of the device. In multi-threaded tasks (rendering, archiving, compilation) it’s notably stronger than older Ryzen 7 68xxH parts and comparable to early Core i7 / Core Ultra H-series chips.

Versus newer Zen 5 (e.g., Ryzen AI 9 HX 370), H 255 in classic CPU workloads is usually ~25% slower - expected given architectural and power differences.

For a rough “real-world” pointer, a typical CPU-Z run might show about ~639 (1T) and ~6340 (nT) on an H 255 system - but remember that’s a single sample and varies with firmware and TDP/fan profiles.

Radeon 780M graphics: 1080p gaming on low-medium

The integrated Radeon 780M (RDNA 3, 12 CU) remains one of the strongest iGPUs in its class. In H 255 devices its frequency is typically a notch lower than on Ryzen 7 260 (up to ~2.6 GHz vs. 2.7 GHz), but in practice that translates to only single-digit FPS differences, often within the margin introduced by settings and TDP. For 1080p with low-medium presets and upscalers (FSR), the 780M delivers playability in many esports and AA titles.

Crucial: fast dual-channel memory (LPDDR5X-7500 or DDR5-5600) is the iGPU’s “fuel.” Moving from single- to dual-channel and raising memory speed brings a noticeable FPS uplift.

No NPU: what that means for “AI features”

Unlike Ryzen 7 250/260, H 255 has no active NPU (Ryzen AI). That barely affects office, creative, or gaming use, but some on-device AI features in Windows (on-device dictation/captions, parts of “Copilot+,” etc.) are either unsupported or offloaded to CPU/GPU. If you need energy-efficient on-device AI, look for chips with at least a 16 TOPS NPU (e.g., Ryzen 7 260).

Platform and I/O

H 255’s platform is modern and flexible:

PCIe 4.0 (up to 20 lanes) - enough for fast SSDs and discrete controllers (including OCuLink/external GPU enclosures via bridges).
USB4 (up to 2× 40 Gbps) - for speedy NVMe boxes, external graphics, and docks.
Up to 4 displays - handy for mini-PC workstations.

Power and cooling

Vendors commonly set ~45 W TDP (with a 35-54 W range possible). Compact mini PCs often run 45-54 W limits, boosting sustained clocks under load, but requiring more robust cooling and potentially noticeable acoustics under turbo. Laptop profiles depend on BIOS/EC and performance modes.

Where you can already find Ryzen 7 H 255

Beelink SER9 Pro - a mini PC with H 255 and Radeon 780M, with high-spec display outputs and USB4 port(s) listed.
Minisforum N5 (NAS-style mini) - an example NAS/mini-PC on H 255 with two USB4 and OCuLink; the processor also appears in certain local models.
A number of laptops for local lineups. Exact configurations vary by model and year.

Comparisons and positioning

Versus Ryzen 7 250. H 255 draws more power (45 W vs. 28 W default) but has a higher CPU base clock (3.8 GHz vs. 3.3 GHz). However, core/thread counts and iGPU configuration are the same, and only the 260-series has an NPU. If battery life and an AI accelerator matter, the 250 makes sense; if you prefer stable clocks under sustained load and don’t care about “AI extras,” H 255 looks better.

Versus Ryzen 7 260. H 255’s advantage is more about potential cost: the 260 offers higher max CPU/GPU clocks and a 16 TOPS NPU, so it’s generally faster and more capable. H 255 is the “slightly simpler and cheaper” alternative without an NPU.

Who should consider Ryzen 7 H 255

Buyers of mini PCs for office/creative workloads, light photo/video editing, and 1080p gaming on integrated graphics.
Users who don’t need built-in AI accelerators and care more about Zen 4 price-to-performance and modern I/O (USB4, PCIe 4.0).
Those eyeing locally targeted devices with attractive pricing and a solid Zen 4 + 780M configuration.

Pros and cons

Pros

8C/16T Zen 4 plus fast Radeon 780M - a strong duo without a dGPU.
Modern I/O: USB4, PCIe 4.0, multi-display.
Good TDP scalability and predictable performance on par with 8745H/8845HS.

Cons

No NPU (Ryzen AI): many Windows on-device AI features are unavailable or fall back to CPU/GPU.
Regional availability: more common in local lineups, so global documentation can be scarcer.
Trails Zen 5 solutions (e.g., HX 370) and the “260” within the same Hawk Point family in certain workloads.

Bottom line

AMD Ryzen 7 H 255 is a pragmatic “workhorse” APU in the 8745H/8845HS class, aimed at locally focused devices and missing an NPU. It offers a strong CPU+GPU foundation (Zen 4 + Radeon 780M), a modern platform (USB4/PCIe 4.0, fast memory), and predictable performance across a wide range of tasks. If you need on-device AI or want the very highest clocks/headroom, look to Ryzen 7 260 or Zen 5 parts. But if your priority is price-to-performance in a mini PC or laptop without mandatory AI features, Ryzen 7 H 255 is a very solid buy.

Basic

Label Name

AMD

Platform

Laptop

Launch Date

January 2025

Model Name

The Intel processor number is just one of several factors - along with processor brand, system configurations, and system-level benchmarks - to be considered when choosing the right processor for your computing needs.

Ryzen 7 H 255

Code Name

Zen 4 (Hawk Point)

CPU Specifications

Total Cores

Cores is a hardware term that describes the number of independent central processing units in a single computing component (die or chip).

Total Threads

Where applicable, Intel® Hyper-Threading Technology is only available on Performance-cores.

Performance-cores

Performance-core Base Frequency

3.8 GHz

Performance-core Max Turbo Frequency

Maximum P-core turbo frequency derived from Intel® Turbo Boost Technology.

4.9 GHz

L1 Cache

64 K per core

L2 Cache

1 MB per core

L3 Cache

16 MB shared

Unlocked Multiplier

Multiplier

Bus Frequency

100 MHz

CPU Socket

The socket is the component that provides the mechanical and electrical connections between the processor and motherboard.

FP8

Technology

Lithography refers to the semiconductor technology used to manufacture an integrated circuit, and is reported in nanometer (nm), indicative of the size of features built on the semiconductor.

4 nm

TDP

Max. Operating Temperature

Junction Temperature is the maximum temperature allowed at the processor die.

100 °C

PCIe Version

PCI Express is a high-speed serial computer expansion bus standard used for connecting high-speed components, replacing older standards such as AGP, PCI, and PCI-X. It has gone through multiple revisions and improvements since its initial release. PCIe 1.0 was first introduced in 2002, and in order to meet the growing demand for higher bandwidth, subsequent versions have been released over time.

4.0

Instruction Set

The instruction set is a hard program stored inside the CPU that guides and optimizes CPU operations. With these instruction sets, the CPU can run more efficiently. There are many manufacturers that design CPUs, which results in different instruction sets, such as the 8086 instruction set for the Intel camp and the RISC instruction set for the ARM camp. x86, ARM v8, and MIPS are all codes for instruction sets. Instruction sets can be extended; for example, x86 added 64-bit support to create x86-64. Manufacturers developing CPUs that are compatible with a certain instruction set need authorization from the instruction set patent holder. A typical example is Intel authorizing AMD, enabling the latter to develop CPUs compatible with the x86 instruction set.

x86-64

Transistor Count

25 billions

Memory Specifications

Memory Type

Intel® processors come in four different types: Single Channel, Dual Channel, Triple Channel, and Flex Mode. Maximum supported memory speed may be lower when populating multiple DIMMs per channel on products that support multiple memory channels.

LPDDR5X-7500,DDR5-5600

Max Memory Size

Max memory size refers to the maximum memory capacity supported by the processor.

256 GB

Memory Channels

The number of memory channels refers to the bandwidth operation for real world application.

Max Memory Bandwidth

Max Memory bandwidth is the maximum rate at which data can be read from or stored into a semiconductor memory by the processor (in GB/s).

120 GB/s

ECC Memory Support

GPU Specifications

Integrated Graphics Model

An integrated GPU refers to the graphics core that is integrated into the CPU processor. Leveraging the processor's powerful computational capabilities and intelligent power efficiency management, it delivers outstanding graphics performance and a smooth application experience at a lower power consumption.

true

GPU Max Dynamic Frequency

2600 MHz

GPU Base Frequency

800 MHz

Execution Units

The Execution Unit is the foundational building block of Intel’s graphics architecture. Execution Units are compute processors optimized for simultaneous Multi-Threading for high throughput compute power.