Intel Core Ultra 9 275HX VS Intel Core Ultra 9 285H

Both the Core Ultra 9 275HX and Core Ultra 9 285H are laptop-class processors built on the same 3 nm manufacturing node, and they share a common feature set: PCIe 5 support, integrated graphics, and full 64-bit compatibility. This means that at a foundational level, both chips benefit from the same modern manufacturing efficiency and platform capabilities.

The most meaningful differentiator in this group is Thermal Design Power. The 275HX carries a 55W TDP versus the 285H's 45W, a 22% higher power envelope. In practice, this means the 275HX is designed for thicker, more aggressively cooled laptops — think mobile workstations — where sustained performance headroom matters more than battery life or chassis thinness. The 285H, by contrast, fits the mainstream high-performance ultrabook mold, balancing power and thermals more conservatively. Notably, despite its higher TDP, the 275HX has a lower maximum CPU temperature ceiling at 105 °C compared to the 285H's 110 °C, suggesting the 275HX is tuned to rely on robust system cooling rather than thermal headroom in the silicon itself.

The two chips also use entirely different sockets — BGA 2114 for the 275HX and BGA 2049 for the 285H — confirming they target distinct laptop platform designs and are not interchangeable. Overall, the 275HX has a clear edge for users who need maximum sustained performance in a workstation-class system, while the 285H is the better-suited choice for thinner, battery-conscious builds where a lower thermal footprint is a priority.

The Intel Core Ultra 9 275HX and Intel Core Ultra 9 285H differ in several aspects of performance, particularly in CPU speed, threads, and cache. The 275HX features a CPU speed of 8 x 2.7 GHz and 16 x 2.1 GHz, with a turbo clock speed of 5.4 GHz and 24 threads. In contrast, the 285H has a CPU speed of 6 x 2.9 GHz and 8 x 2.7 GHz, also with a turbo clock speed of 5.4 GHz, but it supports only 16 threads. This means the 275HX has a higher number of cores, which could provide advantages in multi-threaded tasks.

Both processors use big.LITTLE technology, allowing them to optimize power and performance by switching between high-performance and energy-efficient cores. The 275HX has an unlocked multiplier, giving more flexibility for overclocking, while the 285H does not offer this feature. Additionally, the 275HX has a larger L3 cache at 36 MB, compared to the 285H’s 24 MB, which could potentially improve performance in cache-sensitive tasks.

Finally, the 275HX uses a clock multiplier of 27, while the 285H uses a clock multiplier of 29. These differences reflect slight variations in their architecture and clock control, but they both share the same turbo clock speed of 5.4 GHz.

In the benchmark results, the Intel Core Ultra 9 275HX significantly outperforms the Intel Core Ultra 9 285H. The 275HX has a total PassMark score of 56426, while the 285H scores 33969. This shows a notable difference in overall processing power between the two. For single-threaded performance, the 275HX scores 4723, slightly higher than the 285H's single-threaded score of 4472.

While the 275HX leads in both total and single-thread performance, the difference is more pronounced in the overall PassMark score. However, the 285H still performs strongly in single-threaded tasks, with only a small gap to the 275HX in that area.

Overall, the 275HX delivers better benchmark results in both single and multi-threaded tasks, indicating higher overall performance when compared to the 285H.

The integrated graphics of the Intel Core Ultra 9 275HX and Intel Core Ultra 9 285H show some notable differences in performance and features. Both processors have a GPU clock speed of 300 MHz, but the 285H features a higher GPU turbo of 2350 MHz compared to the 275HX’s turbo of 1900 MHz, offering a faster boost in graphics performance.

In terms of DirectX support, the 275HX supports DirectX 12, while the 285H supports DirectX 12 Ultimate, offering additional features and enhancements, though both processors are compatible with the latest version of DirectX. Both processors also support up to 4 displays, so multi-monitor setups are equally feasible on both. The OpenGL version differs slightly, with the 275HX supporting OpenGL 4.5, while the 285H supports OpenGL 4.6, providing slightly more advanced graphics capabilities in the 285H.

Both processors support OpenCL version 3, indicating equal support for parallel computing tasks using the GPU. Overall, the 285H has a slight edge with its higher GPU turbo, support for DirectX 12 Ultimate, and OpenGL 4.6, though both processors share a similar foundation in integrated graphics performance.

The memory specifications of the Intel Core Ultra 9 275HX and Intel Core Ultra 9 285H show both similarities and differences. Both processors support DDR5 memory with two memory channels, but they differ in terms of maximum memory speed, capacity, and support for error-correcting code (ECC) memory. The 275HX supports a maximum RAM speed of 6400 MHz, while the 285H supports a faster RAM speed of 8400 MHz. This means the 285H can potentially deliver faster memory performance.

In terms of maximum memory capacity, the 275HX supports up to 192GB, whereas the 285H supports a lower maximum of 128GB. This provides the 275HX with a greater memory ceiling for handling larger datasets and demanding applications. Neither processor supports ECC memory, meaning neither is designed to automatically detect and correct memory errors, which is typically a feature found in server-grade chips.

Overall, while both processors share some core memory features, the 275HX offers more memory capacity, while the 285H offers faster RAM speeds. Both are suited to different needs depending on whether raw memory size or memory speed is a higher priority.

The Intel Core Ultra 9 275HX and Intel Core Ultra 9 285H have identical features in terms of instruction sets and security features. Both processors support the same instruction sets, including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2. This means both chips offer the same set of capabilities for various computing tasks like multimedia processing, encryption, and advanced vector extensions.

Additionally, both processors feature the NX bit (No eXecute bit), which is a security feature that helps protect against malicious software by marking certain areas of memory as non-executable. This is an important feature for ensuring system security.

In summary, both the 275HX and the 285H share the same instruction sets and security features, meaning there is no difference between the two in this area.