AMD Ryzen 7 8745H VS AMD Ryzen 7 H 255

In terms of general characteristics, the AMD Ryzen 7 8745H and the AMD Ryzen 7 H 255 are effectively identical across every measured spec in this group. Both are designed for Laptop and Desktop form factors, include integrated graphics, and share a 45W TDP, a 4 nm manufacturing process, a maximum CPU temperature of 100 °C, PCIe 4.0 support, and full 64-bit compatibility.

The shared 4 nm node and 45W TDP are worth noting: a modern sub-5 nm process generally delivers a favorable balance of performance per watt and thermal efficiency, while a 45W envelope places both firmly in the performance laptop tier — capable of sustained workloads without crossing into desktop-only power territory. Neither chip carries an inherent thermal or platform disadvantage over the other based on this data.

Based strictly on the general info specs provided, these two processors are in a complete tie. There is no differentiator in this group that would give either chip an advantage. Buyers should look to other spec groups — such as core counts, clock speeds, or cache — to find meaningful distinctions between the two.

Across every performance metric in this group, the Ryzen 7 8745H and the Ryzen 7 H 255 are a perfect mirror of each other. Both pack 8 cores and 16 threads, run at a base clock of 3.8 GHz, and boost up to 4.9 GHz — a healthy spread that allows both chips to scale well from lightly-threaded tasks up to demanding multi-core workloads.

Cache configuration is equally matched: each processor carries 8 MB of L2 and 16 MB of L3, translating to 1 MB L2 and 2 MB L3 per core. Adequate L3 in particular reduces how often the CPU must reach out to slower main memory, which keeps latency-sensitive workloads like gaming and real-time data processing running smoothly. Neither chip uses big.LITTLE heterogeneous core architecture, meaning all eight cores operate at the same performance level — a design choice that favors consistency and predictability over peak efficiency gains.

The verdict here is a complete tie. With identical core counts, clock speeds, turbo headroom, cache sizes, and multiplier configurations, there is no performance advantage to be found on either side within this spec group. Prospective buyers will need to weigh specs from other categories to differentiate the two.

Both the Ryzen 7 8745H and the Ryzen 7 H 255 feature the same integrated GPU: the Radeon 780M. This is a meaningful detail in itself — the 780M sits at the upper end of AMD's integrated graphics lineup, and its presence in both chips means users get a capable iGPU capable of light gaming, hardware-accelerated video processing, and multi-display productivity without a discrete card.

The underlying GPU specs reinforce that parity: both chips run at a base clock of 800 MHz and a turbo of 2600 MHz, backed by 768 shading units, 48 TMUs, and 32 ROPs. That shading unit count is substantial for an integrated solution and directly underpins the 780M's ability to handle graphically demanding tasks beyond basic display output. Support for up to 4 simultaneous displays also makes either chip a practical choice for multi-monitor workstation setups. API compatibility — DirectX 12, OpenGL 4.6, and OpenCL 2.1 — is modern and consistent across both, ensuring broad software and compute workload support.

This category is another complete tie. Every GPU specification — from shader counts to API versions to clock speeds — is identical. Neither chip holds any integrated graphics advantage over the other based on the data provided.

Memory capability is another area where the Ryzen 7 8745H and Ryzen 7 H 255 are indistinguishable. Both support DDR5 at speeds up to 7500 MHz across a dual-channel configuration — a combination that provides substantial memory bandwidth, directly benefiting the integrated Radeon 780M GPU (which draws on system RAM) as well as CPU-bound workloads that are sensitive to data throughput.

A maximum addressable capacity of 256 GB is notably generous for the mobile and desktop segments these chips target, leaving ample headroom for memory-intensive professional applications such as virtualization, large dataset processing, or in-memory databases. The absence of ECC support on both chips is worth noting for anyone considering workstation or mission-critical deployments — neither processor can offer hardware-level memory error correction, which is expected at this tier but worth flagging.

No differentiation exists in this category. With matching DDR5 generations, identical peak speeds, the same channel count, and equal capacity ceilings, this is a complete tie. The memory subsystem will perform identically regardless of which chip a buyer selects.

Feature parity continues into this category. The Ryzen 7 8745H and Ryzen 7 H 255 share an identical instruction set roster — including AVX2, FMA3, AES, and SSE 4.1/4.2, among others. AVX2 and FMA3 are particularly relevant for real-world performance: they enable wide vectorized operations and fused multiply-add calculations that accelerate workloads like scientific computing, media encoding, machine learning inference, and even certain game physics engines.

The built-in AES hardware instruction is a quiet but impactful inclusion — it offloads encryption and decryption tasks directly to dedicated silicon, meaning full-disk encryption, HTTPS traffic, and secure file operations carry virtually no CPU overhead. Both chips also support multithreading and the NX bit, the latter being a hardware-enforced security feature that marks memory regions as non-executable, providing a foundational layer of protection against a class of buffer overflow exploits.

As with every preceding group, this is a complete tie. The instruction set support, security features, and threading capabilities are byte-for-byte identical between the two processors. There is no feature-level differentiator here that would favor one chip over the other.