AMD Ryzen 9 8945HX VS Intel Core Ultra 9 275HX

At the foundational level, both the AMD Ryzen 9 8945HX and the Intel Core Ultra 9 275HX share a number of key architectural similarities: both are 55W TDP processors with integrated graphics, full PCIe 5.0 support, and 64-bit capability. This means neither has an inherent platform-level advantage in terms of bandwidth headroom or software compatibility — they are evenly matched on those fronts.

The most meaningful differentiator in this group is manufacturing process: the Ryzen 9 8945HX is built on a 5 nm node, while the Core Ultra 9 275HX steps down to 3 nm. A smaller node generally translates to better transistor density, which can support improved power efficiency or higher performance within the same thermal envelope. Paired with this, the Intel chip has a slightly higher maximum CPU temperature ceiling of 105 °C versus AMD's 100 °C, suggesting Intel's design tolerates — and may require — a marginally more aggressive thermal operating range to extract its performance.

One notable asymmetry is deployment scope: the Ryzen 9 8945HX is rated for both desktop and laptop use, whereas the Core Ultra 9 275HX is a laptop-only part. This gives AMD broader platform flexibility for system integrators. Overall, Intel holds a process node edge in this group, but AMD counters with wider deployment versatility — making this category close, with a slight manufacturing advantage to Intel if raw node advancement is prioritized.

The AMD Ryzen 9 8945HX and Intel Core Ultra 9 275HX show some key differences in their performance specifications. Starting with CPU speed, the Ryzen 9 8945HX runs at 16 x 2.5 GHz, while the Intel Core Ultra 9 275HX has a more complex configuration of 8 cores running at 2.7 GHz and 16 cores running at 2.1 GHz. This difference in core configuration and speeds may influence how each processor handles multi-threaded tasks.

Both processors have the same turbo clock speed of 5.4 GHz, ensuring high-performance bursts when needed. The Ryzen 9 8945HX features 32 threads, compared to the Intel Core Ultra 9 275HX's 24 threads, which could give the Ryzen processor an advantage in heavily multi-threaded workloads, though this depends on how well each processor handles those threads.

In terms of cache, the Ryzen 9 8945HX has a larger L3 cache with 64 MB, while the Intel Core Ultra 9 275HX has 36 MB. However, the Intel processor has a significantly larger L2 cache of 40 MB, compared to 16 MB in the Ryzen 9 8945HX. Another difference is that the Intel Core Ultra 9 275HX uses big.LITTLE technology, while the Ryzen 9 8945HX does not. This means the Intel processor can dynamically adjust between performance and efficiency cores for better power management.

The benchmark results for the AMD Ryzen 9 8945HX and Intel Core Ultra 9 275HX show some differences in overall performance. The Ryzen 9 8945HX has a PassMark result of 53181, while the Intel Core Ultra 9 275HX achieves a higher PassMark score of 56426. This indicates that the Intel processor may have a slight edge in multi-threaded tasks or general workload performance.

Looking at the single-thread performance, the Ryzen 9 8945HX scores 3980, while the Intel Core Ultra 9 275HX scores 4723. This suggests that the Intel processor also leads in single-threaded performance, which could result in better performance in tasks that rely heavily on single-core speeds, such as gaming or certain productivity applications.

In summary, both processors deliver strong benchmark results, with the Intel Core Ultra 9 275HX leading in both overall and single-thread performance compared to the AMD Ryzen 9 8945HX.

The integrated graphics on the AMD Ryzen 9 8945HX and Intel Core Ultra 9 275HX show some notable differences. The Ryzen 9 8945HX has a GPU clock speed of 400 MHz, while the Intel Core Ultra 9 275HX is slightly lower at 300 MHz. In terms of turbo GPU clock speeds, the Ryzen 9 8945HX supports up to 2200 MHz, whereas the Intel processor offers a slightly lower turbo speed of 1900 MHz.

Both processors support 4 displays, and the number of supported displays is the same. The Ryzen 9 8945HX supports DirectX 12 Ultimate, while the Intel Core Ultra 9 275HX supports the earlier version, DirectX 12. The Ryzen processor also supports OpenGL version 4.6, whereas the Intel processor supports OpenGL version 4.5.

Finally, the Ryzen 9 8945HX supports OpenCL 2.1, while the Intel Core Ultra 9 275HX supports the newer OpenCL 3 version. These differences in graphics specifications highlight some variation in graphics capabilities and supported technologies between the two processors.

The memory specifications of the AMD Ryzen 9 8945HX and Intel Core Ultra 9 275HX show some important differences. Both processors support DDR5 memory and utilize 2 memory channels. However, the Ryzen 9 8945HX supports a maximum RAM speed of 5200 MHz, while the Intel Core Ultra 9 275HX supports a higher maximum RAM speed of 6400 MHz.

In terms of maximum memory capacity, the Ryzen 9 8945HX supports up to 64 GB of RAM, while the Intel Core Ultra 9 275HX can handle a much larger maximum capacity of 192 GB.

Both processors do not support ECC memory, meaning they are not designed for error-correcting memory, which is typically used in servers and high-reliability systems.

Both the AMD Ryzen 9 8945HX and Intel Core Ultra 9 275HX feature the same instruction sets, including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2. This means that both processors support a broad range of modern instruction sets designed to optimize performance in various computing tasks.

Additionally, both processors have the NX bit, which is a security feature that helps prevent certain types of malicious software from executing in non-executable memory areas.

In summary, the AMD Ryzen 9 8945HX and Intel Core Ultra 9 275HX are identical in terms of instruction sets and the presence of the NX bit, offering similar features in this category.