AMD Ryzen 9 8940HX VS Intel Core Ultra 7 255HX

At the foundational level, both the AMD Ryzen 9 8940HX and the Intel Core Ultra 7 255HX share a common thermal envelope of 55W TDP, PCIe 5.0 support, integrated graphics, and 64-bit compatibility — meaning neither holds a structural advantage in terms of platform integration or bandwidth capability at the bus level.

The most significant differentiator in this group is process node: the Ryzen 9 8940HX is built on a 5 nm process, while the Core Ultra 7 255HX steps down to 3 nm. A smaller node generally translates to better transistor density, which can yield improved power efficiency or higher performance within the same thermal budget. At identical TDPs, this gives Intel a theoretical efficiency edge. The Intel chip also has a marginally higher maximum CPU temperature ceiling (105 °C vs 100 °C), which allows its thermal management firmware slightly more headroom before throttling — a subtle but real advantage in sustained workloads.

One notable asymmetry is deployment scope: the Ryzen 9 8940HX is rated for both laptop and desktop form factors, whereas the Core Ultra 7 255HX is laptop-only. This gives AMD broader platform flexibility for system integrators. Overall, Intel holds the edge in this group thanks to its more advanced process node and marginally higher thermal ceiling, while AMD counters with greater deployment versatility.

The AMD Ryzen 9 8940HX and Intel Core Ultra 7 255HX show several differences in terms of performance-related specifications. The AMD Ryzen 9 8940HX has 16 cores running at a base speed of 2.4 GHz, while the Intel Core Ultra 7 255HX uses a more complex configuration with 8 cores running at 2.4 GHz and 12 additional cores running at 1.8 GHz. This indicates a hybrid architecture for the Intel processor, which is designed to balance performance and efficiency with its big.LITTLE technology, a feature not present in the AMD Ryzen 9 8940HX.

In terms of CPU threads, the Ryzen 9 8940HX has 32 threads, whereas the Intel Core Ultra 7 255HX supports 20 threads. This difference in thread count may affect multitasking and parallel processing performance, with the Ryzen 9 potentially having an edge in heavily threaded tasks. Both processors have an unlocked multiplier, meaning users can overclock them for additional performance, though neither product provides further information on overclocking limits.

The turbo clock speed of the AMD Ryzen 9 8940HX reaches 5.3 GHz, slightly surpassing the Intel Core Ultra 7 255HX's 5.2 GHz turbo boost. The Ryzen 9 also has an L2 cache of 16 MB, while the Intel chip offers a larger 36 MB L2 cache. Both processors use a clock multiplier of 24, providing consistency in how their clock speeds scale under different loads. Despite the slight differences in specs, both chips are designed to deliver powerful performance for demanding tasks.

In terms of benchmark results, the AMD Ryzen 9 8940HX and Intel Core Ultra 7 255HX show some differences. The AMD Ryzen 9 8940HX achieves a PassMark result of 51,227, while the Intel Core Ultra 7 255HX has a slightly lower result of 50,739. This suggests that, in multi-core performance, the Ryzen 9 8940HX may have a small edge.

For single-core performance, the Intel Core Ultra 7 255HX performs better with a PassMark result of 4,645, compared to the Ryzen 9 8940HX's 3,860. This indicates that the Intel processor may deliver slightly faster performance in tasks that rely more heavily on single-threaded operations.

Overall, while the AMD Ryzen 9 8940HX shows a stronger multi-core benchmark, the Intel Core Ultra 7 255HX excels in single-core performance. The differences, however, are not vast, and both processors are likely to perform well across a wide range of applications.

The AMD Ryzen 9 8940HX and Intel Core Ultra 7 255HX both feature integrated graphics with some differences in their specifications. The Ryzen 9 8940HX has a GPU clock speed of 400 MHz, which is higher than the Intel Core Ultra 7 255HX's GPU clock speed of 300 MHz. Additionally, the Ryzen 9 8940HX's GPU turbo boost reaches 2200 MHz, while the Intel processor's turbo boost is slightly lower at 1850 MHz.

Both processors support DirectX 12 and offer similar display support, with each capable of handling up to 4 supported displays. However, there is a slight difference in their OpenGL versions, as the Ryzen 9 8940HX supports OpenGL 4.6, while the Intel Core Ultra 7 255HX supports OpenGL 4.5. Additionally, the Intel processor supports OpenCL 3, which is a newer version compared to the Ryzen 9's OpenCL 2.1 support.

Overall, while both processors offer similar core graphics features, the Ryzen 9 8940HX has higher GPU clock speeds and a slightly more advanced OpenGL version. The Intel Core Ultra 7 255HX, however, supports a newer OpenCL version, which could be beneficial for certain applications.

The AMD Ryzen 9 8940HX and Intel Core Ultra 7 255HX differ in several memory-related aspects. The Ryzen 9 8940HX supports a maximum RAM speed of 5200 MHz, while the Intel Core Ultra 7 255HX can handle faster memory with a maximum RAM speed of 6400 MHz. Both processors use DDR5 memory, but the Ryzen 9 8940HX supports up to 64GB of maximum memory, whereas the Intel Core Ultra 7 255HX can accommodate up to 192GB, offering significantly more memory capacity.

Both processors feature two memory channels, ensuring efficient data transfer between the CPU and memory. Neither processor supports ECC (Error-Correcting Code) memory, meaning neither is designed to automatically detect and correct memory errors.

Overall, the Intel Core Ultra 7 255HX has advantages in both memory speed and capacity compared to the AMD Ryzen 9 8940HX, although both processors use the same DDR5 memory version and share similar memory channel configurations.

Both the AMD Ryzen 9 8940HX and Intel Core Ultra 7 255HX support the same set of instruction sets, including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2. This means that both processors offer similar capabilities for handling a range of workloads, from multimedia tasks to cryptographic functions and advanced vector operations.

Additionally, both processors are equipped with the NX bit, a security feature that helps prevent certain types of attacks by marking memory pages as non-executable. This feature is common to both the Ryzen 9 8940HX and the Intel Core Ultra 7 255HX, indicating similar security functionalities between the two.

In summary, the two processors have identical features in this group, with no differences in their instruction sets or security capabilities.