Intel Core i5-12500H vs Intel Core Ultra 5 135U Comparison

The Intel Core i5-12500H and Intel Core Ultra 5 135U are two mobile processors that, on the surface, appear to be near-identical in overall performance. Both sit at the 76th percentile among all CPUs, and their average benchmark scores are virtually tied, with the i5-12500H at 22625 and the Ultra 5 135U at 22618. Yet, this statistical dead heat in aggregate scores masks a fundamental split in their capabilities. The data reveals a clear performance hierarchy based on workload type, with the i5-12500H dominating in heavy, multi-threaded tasks, while the Ultra 5 135U shows surprising, albeit narrow, strengths in specific algorithmic workloads. The question is not which is faster, but which is faster at what you actually do.

Where Each One Wins

The benchmark results paint a stark picture of two very different performance profiles. The Intel Core i5-12500H is the undisputed champion of sustained, high-intensity computing. Out of the 17 head-to-head benchmark comparisons, it secures a decisive 15 wins. This includes every single Cinebench test, which are classic indicators of rendering and CPU-intensive productivity performance. Its victories are not marginal either; they are substantial, ranging from an 18.8% lead in Passmark multithread to a staggering 113% advantage in Cinebench R23 multicore. This processor is built for workloads that can utilize its full architecture, such as video editing, 3D rendering, and software compilation.

Conversely, the Intel Core Ultra 5 135U wins only two benchmarks, but they are telling. It takes the crown in Passmark find prime numbers and Passmark physics. The former is a test of pure integer arithmetic and algorithmic efficiency, while the latter often indicates strengths in specific physics simulation instruction sets. The Ultra 5 135U’s wins are narrow, with a 10.9% lead in prime number calculation and a 9.3% lead in physics, but they suggest that in certain specialized, single-threaded or latency-sensitive tasks, its newer architecture has a distinct edge. For everything else that demands raw throughput, the data is unequivocal: the i5-12500H is the superior choice.

Architecture Differences

The performance split is rooted in the fundamental architectural differences between the two chips. The i5-12500H is built on Intel’s Alder Lake-H architecture, fabricated on a 10 nm process node, and features a large 217 mm² die. In contrast, the Ultra 5 135U is a Meteor Lake part, built on a more advanced 7 nm process. This generational leap is evident in the cache hierarchy, where the Ultra 5 135U has a larger L1 cache of 112 KB per core and a 2 MB L2 cache per core, compared to 80 KB and 1.25 MB respectively on the i5-12500H. However, the i5-12500H counters with a larger 18 MB shared L3 cache versus the 12 MB on the Ultra 5 135U.

The core and thread configurations tell another part of the story. Both chips have 12 cores, but the i5-12500H supports 16 threads, while the Ultra 5 135U supports only 14. This difference is likely due to a different mix of Performance-cores (P-cores) and Efficient-cores (E-cores) in each hybrid design. The i5-12500H also has a significantly higher TDP of 45W, compared to just 15W for the Ultra 5 135U. This allows the i5-12500H to sustain much higher clock speeds, with a boost clock of 4.50 GHz against the Ultra 5 135U’s 4.40 GHz. The Ultra 5 135U is clearly designed for power efficiency, while the i5-12500H is designed for maximum performance within a mobile chassis. These are different design philosophies: one for raw power, the other for efficiency and portability.

Head-to-Head Benchmarks

Examining the individual benchmark results provides the clearest view of their respective strengths. The most dramatic divergence occurs in Cinebench R23 multicore, where the i5-12500H scores 19840, a full 113% higher than the Ultra 5 135U’s 9315. This result is not an outlier; it is consistent with a trend of massive multi-threaded superiority. In Cinebench R20 multicore, the i5-12500H leads by 40.4%, scoring 8332 versus 5934. Even in the Cinebench R15 multicore test, the lead is a solid 22.3% (1999 vs 1634). This pattern confirms that under sustained multi-core load, the i5-12500H’s higher TDP and thread count translate into a dominant performance advantage.

The single-core story is similar, though the margins are smaller. In Cinebench R23 single-core, the i5-12500H scores 2801, which is 79.2% ahead of the Ultra 5 135U’s 1563. The lead in Cinebench R20 single-core is 40.5% (1176 vs 837). This is a surprising result, given the Ultra 5 135U’s newer architecture, but it suggests that the i5-12500H’s higher boost clock of 4.50 GHz is a decisive factor in these tests. However, in the newer Passmark single-thread test, the gap narrows dramatically to just 2.2% (3418 vs 3343), indicating that the Ultra 5 135U’s architecture is more competitive in modern, instruction-level workloads.

The Ultra 5 135U’s wins are isolated but noteworthy. In Passmark find prime numbers, it scores 64 versus the i5-12500H’s 57, a 10.9% advantage. Similarly, in Passmark physics, it scores 1122 against 1018, a 9.3% lead. These results, coupled with the narrow 2.2% deficit in single-thread performance, suggest that for certain integer-heavy or physics-simulation tasks, the Meteor Lake architecture has a measurable efficiency advantage that can overcome the i5-12500H’s raw clock speed advantage.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Core i5-12500H is overwhelmingly faster. It leads by 113% in Cinebench R23 multicore and by 40.4% in Cinebench R20 multicore, demonstrating a massive advantage in rendering and other multi-threaded tasks.

Q: Is the Intel Core Ultra 5 135U faster in any benchmark?

A: Yes, it wins in two specific tests: Passmark find prime numbers with a score of 64 (a 10.9% lead) and Passmark physics with a score of 1122 (a 9.3% lead). These wins point to strengths in specialized integer and physics workloads.

Q: How do their single-core performances compare?

A: The i5-12500H generally wins, but the margin varies wildly by test. It leads by 79.2% in Cinebench R23 single-core but only by 2.2% in Passmark single-thread, suggesting the Ultra 5 135U is far more competitive in modern single-threaded applications.

Q: Why is there such a large performance gap in multi-core tests?

A: The i5-12500H has a 45W TDP, more threads (16 vs 14), and a higher boost clock of 4.50 GHz. This allows it to sustain much higher power draw and clock speeds under load, which is a major factor in its dominant multi-core performance.

Q: Do both processors support the same memory?

A: Both support dual-channel memory, but the i5-12500H supports DDR4 and DDR5, while the Ultra 5 135U supports DDR5 only, with the exact type depending on the motherboard.

Q: What is the overall performance ranking of these CPUs?

A: Both are in the 76th percentile of all CPUs, and their average benchmark scores are nearly identical (22625 vs 22618). The i5-12500H’s nearest rival is the Ultra 5 135U with a 0% delta, confirming they are considered performance equals in aggregate.

Specification Differences

• Architecture: The i5-12500H is based on Alder Lake (Alder Lake-H), while the Ultra 5 135U uses Meteor Lake.
• Process Node: The i5-12500H is built on a 10 nm process, whereas the Ultra 5 135U uses a 7 nm process.
• Threads: The i5-12500H has 16 threads, while the Ultra 5 135U has 14 threads.
• Base/Boost Clock: The i5-12500H has a base clock of 2.50 GHz and a boost clock of 4.50 GHz. The Ultra 5 135U has a base clock of 1600.00 MHz (1.60 GHz) and a boost of 4.40 GHz.
• TDP: The i5-12500H has a 45W TDP, the Ultra 5 135U has a 15W TDP.
• Socket: The i5-12500H uses Intel BGA 1744, while the Ultra 5 135U uses Intel BGA 2049.
• Cache: The i5-12500H has 80 KB L1 and 1.25 MB L2 per core, with 18 MB shared L3. The Ultra 5 135U has 112 KB L1 and 2 MB L2 per core, with 12 MB shared L3.
• Memory Support: The i5-12500H supports DDR4 and DDR5, while the Ultra 5 135U supports DDR5 only.
• PCIe Lanes: The i5-12500H has 20 Gen 4 lanes (CPU only), while the Ultra 5 135U has 12 Gen 4 lanes (CPU only).
• Integrated Graphics: The i5-12500H has Iris Xe 80EU, while the Ultra 5 135U has Arc Xe-LPG 64EU.
• Die Size: The i5-12500H has a 217 mm² die; the Ultra 5 135U’s die size is not listed.

The Verdict

The data presents a clear choice based on user needs. The Intel Core i5-12500H is the definitive pick for anyone whose workload involves sustained, heavy multi-threading. Its 113% lead in Cinebench R23 multicore and 40.4% lead in R20 multicore make it the obvious choice for content creators, engineers, and analysts who rely on rendering, video encoding, and complex simulations. Its 15 wins across the benchmark suite underscore its versatility as a high-performance mobile processor.

The Intel Core Ultra 5 135U, however, is not without merit. Its narrow victories in prime number finding and physics, along with its competitive 2.2% single-thread deficit in Passmark, suggest it is a more efficient architecture for specific, latency-sensitive tasks. Its 15W TDP is a critical detail; for users who prioritize battery life and low heat output in an ultraportable laptop, the Ultra 5 135U offers a more balanced profile. While it cannot match the i5-12500H’s raw performance, its architectural efficiency makes it a superior choice for users who need a capable processor for everyday tasks and specialized workloads without the power draw of a high-performance H-series chip.