AMD Ryzen 7 8745HS VS AMD Ryzen 7 H 255

In terms of general characteristics, the AMD Ryzen 7 8745HS and the AMD Ryzen 7 255H are effectively identical across every available data point in this group. Both are designed for Laptop and Desktop form factors, feature integrated graphics, share the same 45W TDP, are built on a 4 nm process node, cap at a 100 °C thermal ceiling, support PCIe 4.0, and are fully 64-bit compatible.

The shared 45W TDP means both chips operate within the same power envelope, so neither holds a thermal or efficiency advantage at the platform level. The 4 nm fabrication node places both in the same manufacturing generation, implying comparable transistor density and energy efficiency potential. The identical PCIe 4.0 support ensures both will offer the same bandwidth headroom for NVMe storage and discrete GPU connectivity.

Based strictly on the general info specs provided, these two processors are in a complete tie. There is no differentiating factor within this group — users should look to other spec groups such as CPU performance, core configuration, or memory support to identify any meaningful distinction between the two.

Across every performance metric in this group, the Ryzen 7 8745HS and the Ryzen 7 255H are a perfect match. Both chips field 8 cores and 16 threads, with a base clock of 3.8 GHz and a turbo ceiling of 4.9 GHz. In practice, this means identical responsiveness under light workloads and the same peak frequency headroom when tasks demand a burst of single-threaded power.

Cache architecture tells a similar story — both carry 8 MB of L2 and 16 MB of L3, distributed at the same 1 MB L2 per core and 2 MB L3 per core ratios. A well-sized L3 pool like this helps keep frequently accessed data close to the execution units, reducing memory latency in data-intensive workloads such as video encoding, compilation, or large spreadsheet operations. Neither chip gains any advantage here.

The absence of an unlocked multiplier on both processors means overclocking is off the table for enthusiasts, and neither employs big.LITTLE heterogeneous core design — all 8 cores operate as equals. The verdict for this group is a definitive tie: there is no performance differentiator whatsoever between the two based on the provided data. Users must look beyond this spec group to find any meaningful distinction.

For the first time in this comparison, the benchmark data reveals a measurable — if modest — gap between the two chips. The Ryzen 7 8745HS scores 29,179 in PassMark's multi-threaded test, versus 28,797 for the Ryzen 7 255H. That roughly 1.3% difference in multi-core throughput is unlikely to be perceptible in everyday workloads like web browsing or office productivity, but it does suggest a slight edge in sustained parallel tasks such as rendering, compression, or multi-threaded compilation.

The more telling gap emerges in the single-threaded result: the 8745HS posts 3,768 against the 255H's 3,556 — a difference of approximately 6%. Single-threaded performance is what governs responsiveness in everyday tasks — application launch times, UI fluidity, gaming frame pacing, and most general-purpose code that cannot be parallelized. A 6% lead here is modest but more tangible than the multi-core margin, and it is the metric that most directly influences perceived snappiness.

The Ryzen 7 8745HS holds a clear, if not dramatic, edge in this group. The multi-core advantage is negligible in practice, but the single-thread lead is meaningful enough to give the 8745HS a real-world responsiveness advantage. Buyers prioritizing snappy day-to-day performance should take note of this distinction.

Both the Ryzen 7 8745HS and the Ryzen 7 255H integrate the same Radeon 780M GPU, and the spec sheet confirms there is no differentiation whatsoever between the two implementations. Base and turbo clocks are identical at 800 MHz and 2,600 MHz respectively, and the shader configuration — 768 shading units, 48 TMUs, and 32 ROPs — is a carbon copy across both chips.

The 2,600 MHz turbo frequency is a notable ceiling for an integrated GPU, enabling light gaming at reduced settings, smooth 4K media playback, and capable hardware-accelerated video encode/decode. Support for up to 4 simultaneous displays, DirectX 12, OpenGL 4.6, and OpenCL 2.1 means both processors are equally well-equipped for multi-monitor productivity setups and GPU-accelerated compute workloads like machine learning inference or creative software previews.

This group is a complete tie — every graphics specification is numerically identical. Users relying on integrated graphics for thin-and-light use cases, content consumption, or light creative work will experience no difference between these two chips based on the available data.

Memory capability is another area where the two chips converge entirely. Both the Ryzen 7 8745HS and the Ryzen 7 255H support DDR5 with a maximum validated speed of 7,500 MHz. That high ceiling matters in practice: faster RAM directly feeds the integrated Radeon 780M GPU with more bandwidth, which translates to better frame rates in light gaming scenarios, and also reduces bottlenecks in memory-bound CPU workloads like large dataset processing or real-time audio.

Both processors operate in dual-channel mode and top out at 256 GB of addressable RAM — a ceiling that is more than sufficient for the most demanding prosumer and professional workloads, including virtualization stacks and large in-memory databases. The absence of ECC memory support on both chips signals that neither is targeting mission-critical or server-grade reliability use cases, which is consistent with their mobile and desktop consumer positioning.

With no divergence on any single memory specification, this group is again a complete tie. Whichever chip ends up in a given platform, memory subsystem behavior will be indistinguishable between the two.

Feature parity continues across this group. Both the Ryzen 7 8745HS and the Ryzen 7 255H carry an identical instruction set portfolio: AVX2 and FMA3 are the headline extensions here, enabling accelerated floating-point math that benefits scientific computing, machine learning inference, image processing, and any application compiled to leverage wide vector operations. AES hardware acceleration is equally present on both, meaning encryption and decryption tasks — from full-disk encryption to secure network traffic — are handled efficiently in silicon rather than burdening general-purpose execution units.

Multithreading support is confirmed on both chips, which aligns with what the performance group already established: 16 threads across 8 cores. The NX bit — a hardware-enforced security feature that marks memory regions as non-executable — is also present on both, providing a foundational layer of protection against certain classes of buffer overflow exploits. Its presence is expected on any modern processor but remains a meaningful security baseline worth noting.

There is no differentiator to be found here. Both processors offer the same instruction set breadth, the same multithreading capability, and the same hardware security primitives — making this group yet another complete tie. Software compatibility and workload acceleration will be identical across both chips.