Intel Core i5-13500HX vs Intel Core Ultra 5 135H Comparison

The Intel Core i5-13500HX and Intel Core Ultra 5 135H are both 14-core mobile processors, yet the benchmark data reveals a decisive performance split. The data shows the Core i5-13500HX winning all 17 head-to-head comparisons, with the largest margins appearing in heavily threaded workloads. The average benchmark scores are close — 29270 for the i5-13500HX against 29093 for the Ultra 5 135H — but the distribution of wins tells a story of architectural priorities. Both chips land in the 81st percentile of all CPUs, yet the i5-13500HX does so with a 55W TDP while the Ultra 5 135H operates at 28W.

Head-to-Head Benchmarks

The most decisive victory for the Intel Core i5-13500HX comes in Cinebench R15 multi-core, where it scores 2863 against the Ultra 5 135H’s 1718. That is a 66.6% delta, the largest gap in the entire benchmark set. Cinebench R23 multi-core shows a similar trend, with the i5-13500HX scoring 18334 versus 11875.5, a 54.4% advantage. These are not marginal differences; they indicate a fundamental throughput advantage in rendering and CPU-bound creative tasks.

The multi-core theme continues across the Passmark suite. In data compression, the i5-13500HX scores 331896 against 251651, a 31.9% lead. Floating point math shows a 29.2% gap (70885 vs 54867), while integer math is 30.9% ahead (96195 vs 73509). Extended instructions tell a similar story: 20200 versus 15028, a 34.4% delta. Data encryption is 28.2% faster at 19267 versus 15026. Even random string sorting, a memory-latency-sensitive test, favors the i5-13500HX by 25.5% (36373 vs 28980).

Single-threaded performance is where the two chips nearly converge. The i5-13500HX leads in Cinebench R23 single-core by just 1.8% (1730.5 vs 1700) and in Passmark single-thread by 1.7% (3582 vs 3521). Cinebench R15 single-core shows a 3.3% edge (252 vs 244). The largest single-thread gap is in Cinebench R20, where the i5-13500HX scores 1382 against 1105, a 25.1% delta. This suggests the i5-13500HX’s boost clock of 4.70 GHz provides a tangible advantage in lightly threaded bursts, despite the Ultra 5 135H’s higher 3.60 GHz base clock.

The mid-range multi-threaded tests show consistent but smaller leads. Cinebench R20 multi-core gives the i5-13500HX a 25% edge (9792 vs 7834). Passmark multithread shows a 23.8% lead (27753 vs 22422). Passmark physics is 10.3% ahead (1634 vs 1482), and find prime numbers is 10.1% ahead (98 vs 89). The only sub-10% wins outside single-thread are these two, indicating that the i5-13500HX’s advantage grows with thread count and workload complexity.

Architecture Differences

The two processors come from different Intel generations and design philosophies. The Core i5-13500HX is built on Raptor Lake architecture using a 10 nm process node, while the Core Ultra 5 135H uses Meteor Lake on a 7 nm node. The i5-13500HX features 14 cores and 20 threads, whereas the Ultra 5 135H also has 14 cores but only 18 threads. This thread deficit likely contributes to the Ultra 5 135H’s multi-core losses.

Cache allocations differ significantly. The i5-13500HX has 80 KB of L1 cache per core, 2 MB of L2 per core, and 24 MB of shared L3 cache. The Ultra 5 135H has 112 KB of L1 per core, 2 MB of L2 per core, but only 18 MB of shared L3. The i5-13500HX therefore provides 33% more L3 cache, which helps explain its lead in data-heavy workloads like compression and encryption.

The process node and power envelope are starkly different. The i5-13500HX has a 55W TDP and uses the Intel BGA 1964 socket, while the Ultra 5 135H has a 28W TDP and uses Intel BGA 2049. The i5-13500HX also has a higher boost clock at 4.70 GHz versus 4.60 GHz, but a lower base clock at 2.50 GHz versus 3.60 GHz. The i5-13500HX supports ECC memory, while the Ultra 5 135H does not. Memory support also diverges: the i5-13500HX officially supports DDR4 and DDR5, while the Ultra 5 135H’s memory support is listed as “DDR5, depends on motherboard.” The Ultra 5 135H does list a memory bandwidth of 89.6 GB/s, a figure absent for the i5-13500HX.

PCIe lanes differ considerably. The i5-13500HX provides Gen 5 with 20 lanes (CPU only), while the Ultra 5 135H provides Gen 5 with only 8 lanes (CPU only). Integrated graphics are also different: the i5-13500HX has UHD Graphics 710, while the Ultra 5 135H has Arc Xe-LPG 96EU. The i5-13500HX has an unlocked multiplier, whereas the Ultra 5 135H does not. The i5-13500HX has a die size of 257 mm²; no die size is listed for the Ultra 5 135H.

The Verdict

The data is unambiguous: the Intel Core i5-13500HX wins every benchmark where both chips have scores. For users prioritizing multi-threaded performance — rendering, video encoding, scientific computing — the i5-13500HX is the clear choice. Its 66.6% lead in Cinebench R15 multi-core and 54.4% lead in Cinebench R23 multi-core are substantial. The 55W TDP indicates the i5-13500HX is designed for performance-first laptops where thermals and battery life are secondary.

The Intel Core Ultra 5 135H, despite losing all head-to-head tests, is not without merit. Its 28W TDP suggests it is built for efficiency and portability. The 7 nm process node, smaller than the i5-13500HX’s 10 nm, indicates a more modern manufacturing approach. The Ultra 5 135H’s higher base clock of 3.60 GHz gives it a baseline responsiveness that the i5-13500HX lacks at its 2.50 GHz base. In single-threaded tests, the Ultra 5 135H is within 1.8% of the i5-13500HX in Cinebench R23 and 1.7% in Passmark single-thread, showing that for everyday tasks the difference is minor.

However, the Ultra 5 135H’s lower thread count (18 vs 20) and smaller L3 cache (18 MB vs 24 MB) hamper its multi-core performance. The i5-13500HX also has more PCIe lanes (20 vs 8), making it better suited for discrete GPUs and high-speed storage. From a benchmark perspective, there is no scenario where the Ultra 5 135H wins. The choice comes down to whether the user needs the i5-13500HX’s raw throughput or the Ultra 5 135H’s efficiency profile.

Specification Differences

• Process Node: The i5-13500HX uses 10 nm; the Ultra 5 135H uses 7 nm.
• Threads: The i5-13500HX has 20 threads; the Ultra 5 135H has 18.
• Base Clock: The i5-13500HX runs at 2.50 GHz; the Ultra 5 135H at 3.60 GHz.
• Boost Clock: The i5-13500HX boosts to 4.70 GHz; the Ultra 5 135H to 4.60 GHz.
• TDP: The i5-13500HX is rated at 55W; the Ultra 5 135H at 28W.
• Socket: The i5-13500HX uses Intel BGA 1964; the Ultra 5 135H uses Intel BGA 2049.
• L1 Cache: The i5-13500HX has 80 KB per core; the Ultra 5 135H has 112 KB per core.
• L3 Cache: The i5-13500HX has 24 MB shared; the Ultra 5 135H has 18 MB shared.
• Memory Support: The i5-13500HX supports DDR4 and DDR5; the Ultra 5 135H supports DDR5 (depends on motherboard).
• ECC Memory: Supported on the i5-13500HX; not supported on the Ultra 5 135H.
• PCIe Lanes: The i5-13500HX has 20 Gen 5 lanes; the Ultra 5 135H has 8 Gen 5 lanes.
• Integrated Graphics: The i5-13500HX has UHD Graphics 710; the Ultra 5 135H has Arc Xe-LPG 96EU.
• Unlocked Multiplier: Yes on the i5-13500HX; no on the Ultra 5 135H.
• Release Date: The i5-13500HX launched January 3, 2023; the Ultra 5 135H launched December 13, 2023.
• Memory Bandwidth: The Ultra 5 135H lists 89.6 GB/s; no figure is given for the i5-13500HX.
• Die Size: The i5-13500HX is 257 mm²; no die size is listed for the Ultra 5 135H.

FAQ

Q: Which processor has the higher multi-core performance?

A: The Intel Core i5-13500HX wins all multi-core benchmarks. It leads by 66.6% in Cinebench R15 multi-core (2863 vs 1718) and 54.4% in Cinebench R23 multi-core (18334 vs 11875.5).

Q: Are the single-threaded scores close?

A: Yes, the i5-13500HX leads by 1.8% in Cinebench R23 single-core (1730.5 vs 1700) and 1.7% in Passmark single-thread (3582 vs 3521). The largest single-thread gap is 25.1% in Cinebench R20 (1382 vs 1105).

Q: What is the core and thread count difference?

A: Both processors have 14 cores. The i5-13500HX has 20 threads, while the Ultra 5 135H has 18 threads.

Q: How does cache size compare?

A: The i5-13500HX has 80 KB L1 per core and 24 MB shared L3. The Ultra 5 135H has 112 KB L1 per core and 18 MB shared L3. Both have 2 MB L2 per core.

Q: Which processor has a higher TDP?

A: The i5-13500HX has a TDP of 55W, while the Ultra 5 135H has a TDP of 28W.

Q: Are both processors unlocked for overclocking?

A: No. The i5-13500HX has an unlocked multiplier, while the Ultra 5 135H does not.

Where Each One Wins

The Intel Core i5-13500HX wins every category where benchmark data exists. Its most significant advantages are in multi-threaded rendering and compute workloads. For Cinebench R15 multi-core, the i5-13500HX’s 66.6% lead makes it the obvious pick for 3D rendering and animation. Cinebench R23 multi-core’s 54.4% gap reinforces this for longer rendering tasks. The 34.4% lead in extended instructions suggests the i5-13500HX is better for AVX-heavy scientific and engineering software.

For data-centric workloads, the i5-13500HX excels. Data compression is 31.9% faster, making it suitable for archive management and file compression tools. Data encryption is 28.2% faster, which benefits full-disk encryption and secure communication. Integer math (30.9% ahead) and floating-point math (29.2% ahead) indicate superior performance in spreadsheets, financial modeling, and simulations.

The i5-13500HX also wins in memory-intensive tasks, with random string sorting 25.5% faster. Its 24 MB L3 cache versus 18 MB likely drives this advantage. The 20 PCIe Gen 5 lanes versus 8 on the Ultra 5 135H mean the i5-13500HX is better suited for systems with discrete GPUs or multiple NVMe drives.

The Intel Core Ultra 5 135H has no benchmark wins, but its profile suggests a different use case. The 28W TDP makes it suitable for thin-and-light laptops where battery life is prioritized. The 7 nm process node indicates a more power-efficient design. Its higher base clock of 3.60 GHz means it may feel more responsive in short, light tasks despite losing in sustained workloads. The Arc Xe-LPG 96EU integrated graphics are likely more capable than UHD Graphics 710 for light gaming or media playback, though no benchmark data confirms this. The 89.6 GB/s memory bandwidth figure, absent for the i5-13500HX, suggests the Ultra 5 135H may have a memory throughput advantage, yet this does not translate into wins in the provided tests. For users who need maximum performance, the i5-13500HX is the only choice. For users who value efficiency and are willing to sacrifice multi-core throughput, the Ultra 5 135H offers a lower-power alternative.