Intel Core i7-1255U vs Intel Core i7-1365U Comparison

Head-to-Head Benchmarks

The recorded data shows a clean sweep for the Intel Core i7-1365U across all 17 head-to-head benchmark comparisons. The i7-1255U does not win a single test. The largest gaps appear in single-threaded workloads and specific compute tasks.

The most decisive victory for the i7-1365U comes in the Cinebench R23 single-core test, where it scores 1887 against 1647 for the i7-1255U, a delta of 12.7 percent. This pattern repeats in Cinebench R15 single-core, with the i7-1365U scoring 265.5 versus 237.5, a 10.5 percent advantage. The boost clock difference of 5.20 GHz versus 4.70 GHz clearly translates into measurable single-thread performance gains.

Multi-core rendering also favors the newer part, though by smaller margins. In Cinebench R23 multi-core, the i7-1365U scores 8946 against 8285, a 7.4 percent lead. Cinebench R20 multi-core shows a 5.1 percent gap (4882 versus 4635), and Cinebench R15 multi-core shows a 5.4 percent gap (1466.5 versus 1387). These results indicate that the i7-1365U maintains its advantage even when all cores are active, not just in lightly threaded scenarios.

The PassMark suite reveals some interesting outliers. The largest percentage difference anywhere is in the PassMark find prime numbers test, where the i7-1365U scores 58 against just 40 for the i7-1255U, a 31 percent gap. This is a highly specialized workload, but the magnitude is striking. PassMark physics also shows a substantial difference: 966 versus 789, an 18.3 percent lead for the i7-1365U.

Other PassMark tests show more modest but consistent advantages. Integer math: 50881 versus 48498, a 4.7 percent lead. Floating point math: 33689 versus 32618, a 3.2 percent lead. Multithread: 14045 versus 13234, a 5.8 percent lead. Single thread: 3411 versus 3192, a 6.4 percent lead.

The narrowest margins appear in data compression and random string sorting. Data compression shows only a 1.5 percent gap (149585 versus 147320), and random string sorting is nearly identical at 0.3 percent (16977 versus 16934). Extended instructions and data encryption also show small single-digit gaps of 1.1 percent and 2.8 percent respectively.

The average benchmark score tells the same story. The i7-1365U records an average of 18177, while the i7-1255U records 17656. The percentile rankings are close, with the i7-1365U at the 72nd percentile versus the 71st percentile for the i7-1255U. The nearest rivals for the i7-1255U include the Intel Core i3-13100F with an average score of 17653 and a delta of 0 percent, and the AMD EPYC 9374F at 17693 with a delta of negative 0.2 percent. For the i7-1365U, the nearest rivals include the AMD Ryzen 7 5700U at 18176 with a delta of 0 percent, and the Intel Core i7-9700 at 18180 with a delta of 0 percent.

Architecture Differences

Both processors share the same core and thread configuration: 10 cores and 12 threads. They also share the same process node, 10 nm, and the same foundry, Intel. The cache hierarchy is identical as well: 80 KB of L1 per core, 1.25 MB of L2 per core, and 12 MB of shared L3 cache.

The fundamental architectural difference lies in the generation. The i7-1255U is based on Alder Lake with the codename Alder Lake-U, while the i7-1365U uses Raptor Lake with the codename Raptor Lake-U. This newer architecture is reflected in the boost clock, which rises from 4.70 GHz on the i7-1255U to 5.20 GHz on the i7-1365U. The base clock also increases from 1700 MHz to 1800 MHz.

The integrated graphics differ slightly in naming: the i7-1255U has Iris Xe 96EU, while the i7-1365U has Iris Xe Graphics 96EU. Both are 96 execution unit configurations, so the naming difference appears cosmetic. The PCIe configuration is a notable divergence: the i7-1255U offers Gen 4 with 20 lanes (CPU only), while the i7-1365U drops to Gen 4 with 8 lanes (CPU only). This could affect expansion capabilities on the platform level.

Both processors support DDR4 and DDR5 memory in a dual-channel configuration, and neither supports ECC memory. Both are locked multipliers, meaning no overclocking. The release dates differ by roughly eleven months: the i7-1255U launched on 2022-02-22, while the i7-1365U launched on 2023-01-03. The part numbers are SRLFP for the i7-1255U and SRMM0 for the i7-1365U. Both are listed as Active in production status and target the Mobile market segment.

FAQ

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

A: The Intel Core i7-1365U wins every single-core benchmark. In Cinebench R23 single-core, it scores 1887 versus 1647 for the i7-1255U, a 12.7 percent advantage. In PassMark single thread, it scores 3411 versus 3192, a 6.4 percent lead.

Q: Are the core and thread counts identical?

A: Yes, both processors have 10 cores and 12 threads. They also share the same L3 cache size of 12 MB shared, the same L1 cache of 80 KB per core, and the same L2 cache of 1.25 MB per core.

Q: What is the largest performance gap between the two chips?

A: The largest gap is in the PassMark find prime numbers test. The i7-1365U scores 58, while the i7-1255U scores 40, a 31 percent difference. The second largest is in PassMark physics, where the i7-1365U leads by 18.3 percent.

Q: Do the processors support the same memory types?

A: Yes, both support DDR4 and DDR5 memory in a dual-channel configuration. Neither supports ECC memory.

Q: What is the difference in PCIe lanes?

A: The i7-1255U supports PCIe Gen 4 with 20 lanes (CPU only), while the i7-1365U supports PCIe Gen 4 with 8 lanes (CPU only). This is a significant platform-level difference.

Q: How do the average benchmark scores compare?

A: The i7-1365U has an average benchmark score of 18177, while the i7-1255U has an average of 17656. The i7-1365U sits at the 72nd percentile of all CPUs, versus the 71st percentile for the i7-1255U.

Specification Differences

| Specification | Intel Core i7-1255U | Intel Core i7-1365U |

|---|---|---|

| Base Clock | 1700.00 MHz | 1800.00 MHz |

| Boost Clock | 4.70 GHz | 5.20 GHz |

| Architecture | Alder Lake | Raptor Lake |

| Codename | Alder Lake-U | Raptor Lake-U |

| Generation | Core i7 (Alder Lake-U) | Core i7 (Raptor Lake-U) |

| PCIe | Gen 4, 20 Lanes (CPU only) | Gen 4, 8 Lanes (CPU only) |

| Integrated Graphics | Iris Xe 96EU | Iris Xe Graphics 96EU |

| Release Date | 2022-02-22 | 2023-01-03 |

| Launch MSRP | Not available | $426 |

| Part Number | SRLFP | SRMM0 |

Identical specifications include: 10 cores, 12 threads, 15W TDP, Intel BGA 1744 socket, 10 nm process node, Intel foundry, 80 KB L1 per core, 1.25 MB L2 per core, 12 MB shared L3, DDR4/DDR5 memory support, dual-channel memory bus, no ECC support, locked multiplier, Mobile market segment, and Active production status.

The Verdict

The benchmark data is unambiguous: the Intel Core i7-1365U outperforms the Intel Core i7-1255U in every recorded test. The i7-1365U wins all 17 head-to-head comparisons, with no wins for the i7-1255U. The average benchmark score difference of 521 points (18177 versus 17656) represents a meaningful overall performance uplift.

The i7-1365U's advantages are most pronounced in single-threaded workloads, where the 5.20 GHz boost clock delivers a 10.5 to 12.7 percent edge depending on the Cinebench version. For users who prioritize raw single-core speed, the i7-1365U is clearly the better choice.

The multi-core results show a smaller but still consistent lead for the i7-1365U, ranging from 5.1 percent in Cinebench R20 to 7.4 percent in Cinebench R23. This suggests that the architectural refresh from Alder Lake to Raptor Lake brings efficiency improvements that benefit all-core workloads as well.

The i7-1255U does offer one notable platform advantage: 20 PCIe Gen 4 lanes versus only 8 on the i7-1365U. This could matter for systems that need more high-speed expansion options. However, for pure processor performance, the data shows no area where the i7-1255U comes out ahead.

The launch MSRP for the i7-1365U is $426, while no launch MSRP is recorded for the i7-1255U. The i7-1365U also carries a newer release date, indicating it is the more recent design.

Where Each One Wins

Intel Core i7-1365U wins in:

• All 17 head-to-head benchmark comparisons
• Single-core performance by 6.4 to 12.7 percent depending on the test
• Multi-core performance by 5.1 to 7.4 percent in Cinebench tests
• Specialized compute tasks, with a 31 percent lead in PassMark find prime numbers and an 18.3 percent lead in PassMark physics
• Integer math (4.7 percent), floating point math (3.2 percent), and multithread (5.8 percent) workloads
• Data encryption (2.8 percent) and extended instructions (1.1 percent)
• Higher boost clock at 5.20 GHz versus 4.70 GHz

Intel Core i7-1255U wins in:

• No benchmark comparisons, as the data records zero wins for this processor
• PCIe connectivity, offering 20 Gen 4 lanes versus 8 on the i7-1365U

For users who need maximum processor performance across all workload types, the i7-1365U is the choice supported by the data. The i7-1255U may still be relevant for platform designs that require the additional PCIe lanes, but in every measured CPU benchmark, the i7-1365U delivers superior results.