Intel Core Ultra 9 275HX

Intel Core Ultra 9 275HX is a 24-thread mobile processor based on Arrow Lake-HX architecture, built on a 3 nm TSMC process. It sits in the 97th percentile of all CPUs tracked in the database, with an average benchmark score of 76024. The chip pairs a 55 W TDP with a 5.40 GHz boost clock, and its nearest rivals in the database are all AMD EPYC or Ryzen Threadripper PRO parts — server and workstation silicon that this mobile chip trades blows with in aggregate scoring.

How It Compares

Against the AMD EPYC 4545P, the Core Ultra 9 275HX trails by a razor-thin 0.5% in average benchmark score. The EPYC 4545P posts an average score of 76433 versus 76024 for the Intel part. This is effectively a statistical tie; the mobile chip is within rounding error of a server processor designed for dense compute workloads.

Versus the AMD EPYC 8224P, the Intel chip comes out slightly ahead, with a 0.6% delta in its favor. The EPYC 8224P averages 75582, while the Core Ultra 9 275HX reaches 76024. The margin is small, but the data shows the mobile part edging out this server chip in aggregate performance.

The AMD EPYC Embedded 8224P is the closest competitor, scoring 76492 on average, which puts the Core Ultra 9 275HX 0.6% behind. This embedded variant is built for power-constrained environments, and the fact that a 55 W mobile chip lands within 0.6% of it underscores how competitive the Intel part is in raw throughput.

The AMD Ryzen Threadripper PRO 9945WX leads the group slightly, with an average score of 76513. The Core Ultra 9 275HX trails by 0.6%. This is a workstation-class processor, yet the gap is negligible in percentage terms, meaning the Intel mobile chip delivers comparable aggregate benchmark results despite its lower power class.

Power and Thermals

The Core Ultra 9 275HX carries a 55 W TDP, which classifies it as a high-performance mobile processor. This TDP figure places it in the range where a capable air cooler or a robust laptop cooling solution is necessary; the data does not support any specific cooler size, but the thermal load implied by 55 W is manageable for premium gaming or workstation laptops.

The chip is built on a 3 nm process node manufactured by TSMC, which helps explain how 24 threads can operate within that power envelope. The die size is 243 mm², and the transistor count is 17,800 million. The combination of a leading-edge process and a modest TDP suggests efficiency is a priority, though the database does not include specific thermal or power consumption measurements beyond the TDP figure.

Given the 55 W TDP and the 5.40 GHz boost clock, the chip will require sustained cooling under load. The integrated graphics — Arc Xe-LPG Graphics with 64 execution units — add to the thermal budget, but the data does not quantify that impact. For system integrators, the 55 W figure implies a cooling tier similar to other high-end mobile HX parts, but no direct comparisons are available in the fact pack.

Benchmark Performance

In Cinebench R23 multi-core, the Core Ultra 9 275HX scores 48008, which is its strongest multi-threaded result. The single-core score in the same test is 6777, giving a multi-to-single ratio of roughly 7.1x. This indicates excellent scaling across its 24 threads, which is expected for a chip with no hyperthreading (24 cores, 24 threads).

Cinebench R20 results show 20163 multi-core and 2846 single-core. The R15 run yields 4839 multi-core and 683 single-core. Across all three Cinebench versions, the multi-core scores are consistently strong, placing the chip in the top percentile of the database (97th).

PassMark results reinforce this picture. The multithread score is 56415, while single-thread is 4727. Integer math hits 156314 and floating-point math reaches 193324, showing balanced performance across both arithmetic types. Data compression scores 618338, while data encryption is 48016 — the encryption figure is notably lower relative to compression, suggesting the chip's crypto throughput is not its primary strength.

Extended instructions score 47687, and find prime numbers is 457, which is a comparatively weak result. Random string sorting reaches 75710, and physics scores 3377. The aggregate benchmark score of 76024, combined with the 97th percentile ranking, indicates this processor outperforms the vast majority of CPUs in the database, despite its mobile form factor.

FAQ

Q: How many cores and threads does the Intel Core Ultra 9 275HX have?

A: It has 24 cores and 24 threads, meaning there is no hyperthreading — each core handles one thread.

Q: What is the boost clock speed?

A: The boost clock is 5.40 GHz, while the base clock is 2.70 GHz.

Q: Does this processor support ECC memory?

A: No, ECC memory is not supported. The memory support is DDR5 with a dual-channel bus and 102.4 GB/s bandwidth.

Q: What socket does the Core Ultra 9 275HX use?

A: It uses Intel BGA 2114, which is a ball-grid array socket for mobile applications.

Q: What is the process node and foundry for this chip?

A: It is built on a 3 nm process at TSMC, with a die size of 243 mm² and 17,800 million transistors.

Q: How does it compare to the AMD EPYC 4545P in average score?

A: The Core Ultra 9 275HX is 0.5% behind the EPYC 4545P, which averages 76433 versus 76024 for the Intel part.

Single-Thread vs Multi-Thread Behavior

The split between single-thread and multi-thread performance reveals a processor tuned for parallel workloads. In Cinebench R23, the multi-core score of 48008 is over 7x the single-core score of 6777. This is a strong scaling ratio, indicating that the 24 physical cores are efficiently utilized across all threads.

In PassMark, the multithread score of 56415 versus single-thread of 4727 yields a ratio of roughly 11.9x. The discrepancy between the Cinebench and PassMark ratios is explained by the nature of the tests — Cinebench scales nearly linearly with core count, while PassMark's multithread suite includes memory and cache contention effects. Either way, the data shows the chip excels when all cores are active.

For single-threaded tasks, the 5.40 GHz boost clock ensures competitive performance. The Cinebench R23 single-core score of 6777 is high for a mobile part, and the PassMark single-thread score of 4727 places it well above average. This means the chip handles legacy or lightly-threaded applications without a significant penalty, even though its design clearly prioritizes multi-core throughput.

Real-world implications: workloads like video rendering, code compilation, and scientific simulations — which scale across many cores — will see near-linear gains from the 24 threads. Conversely, applications that rely on a single thread, such as some older games or scripting tasks, will still perform well thanks to the high boost clock, but the chip's advantage over rivals narrows in those scenarios. The benchmark data does not show any single-threaded weakness; rather, it highlights that the Core Ultra 9 275HX is a multi-core monster that remains competent in single-threaded tasks.