Intel Core Ultra 7 265HX vs Intel Core Ultra 7 356H Comparison

The Intel Core Ultra 7 265HX is the decisive winner in this comparison, outperforming the Intel Core Ultra 7 356H in all 17 recorded head-to-head benchmarks. The 265HX holds a substantial lead in multi-threaded workloads, with its largest advantage appearing in Cinebench R23 multi-core, where it scores 40,642 against 18,395, a 120.9% delta. This pattern confirms that the 265HX is the superior processor for demanding computational tasks, while the 356H, with its lower power envelope, serves a different performance tier.

Head-to-Head Benchmarks

The benchmark data demonstrates a comprehensive victory for the Intel Core Ultra 7 265HX across every measured category. The most striking single-core result comes from Cinebench R23, where the 265HX delivers a score of 5,737 compared to the 356H's 2,040, a massive 181.2% advantage. This indicates that the 265HX's architecture and higher boost clock provide a significant per-thread performance advantage, not just raw throughput from additional cores.

Multi-threaded benchmarks reinforce this dominance. In Cinebench R20 multi-core, the 265HX scores 17,069 versus 12,153 for the 356H, a 40.5% delta. The Cinebench R15 multi-core test shows a similar pattern: 4,096 for the 265HX against 3,055 for the 356H, a 34.1% gap. These results align with the core count difference, as the 265HX features 20 cores and 20 threads, while the 356H provides 16 cores and 16 threads.

PassMark tests reveal consistent advantages across varied workloads. Data compression favors the 265HX at 511,817 versus 336,177, a 52.2% delta. Integer math shows a 52.8% lead for the 265HX, scoring 126,954 against 83,111. Floating-point math results are similarly lopsided, with the 265HX at 161,605 and the 356H at 103,128, a 56.7% difference. Extended instructions tests give the 265HX a 46% edge, with scores of 40,741 and 27,898 respectively.

Random string sorting, a memory-latency-sensitive workload, shows a 52.4% delta, with the 265HX scoring 62,458 against 40,990. Data encryption follows with a 49.8% advantage for the 265HX, at 39,472 versus 26,345. Prime number finding, a test sensitive to integer throughput, gives the 265HX a 24.2% lead, scoring 406 against 327.

The closest competition appears in single-threaded PassMark testing. The 265HX scores 4,500 against 4,072 for the 356H, a 10.5% delta. Physics simulation is the narrowest margin of all, with the 265HX at 2,978 and the 356H at 2,895, a 2.9% difference. This near-parity in physics suggests that the 356H's architecture handles this specific workload efficiently despite its lower clock speeds.

The overall average benchmark scores reflect this disparity. The 265HX achieves an average score of 63,173, placing it in the 93rd percentile of all CPUs. The 356H averages 41,215, sitting in the 87th percentile. The 265HX's nearest rival, the Intel Core i7-13790F, scores 63,080, a 0.1% delta, while the 356H's closest competitor, the AMD Ryzen AI 5 PRO 440, scores 41,208, a 0% delta. These figures place both processors in distinct performance brackets.

The Verdict

The data dictates a clear choice. The Intel Core Ultra 7 265HX is the stronger processor for every benchmark category recorded, from single-core to multi-core, and from integer math to memory-heavy workloads. Its 17 wins out of 17 head-to-head tests leave no ambiguity. The 265HX is the appropriate selection for users who prioritize raw processing capability, as indicated by its 120.9% lead in Cinebench R23 multi-core and its 93rd percentile ranking.

The Intel Core Ultra 7 356H, while less performant, is not without merit. Its 25 W TDP, compared to the 265HX's 55 W TDP, indicates a design focused on efficiency rather than maximum throughput. The 356H's 87th percentile ranking still places it above the majority of CPUs, and its 16 cores and 16 threads provide adequate multi-tasking capability. The 356H suits systems where power draw is a primary constraint and where the performance delta of 53.2% in average benchmark score is acceptable.

The 265HX also demonstrates a significant advantage in single-core performance, which affects responsiveness and lightly threaded applications. Its 181.2% lead in Cinebench R23 single-core is the largest margin in the entire comparison. This makes the 265HX the better choice for workloads that depend on per-core speed, such as legacy software or certain simulation tasks. The 356H, with its 1.90 GHz base clock and 4.70 GHz boost clock, cannot match the 265HX's 2.60 GHz base and 5.30 GHz boost.

Architecture Differences

The two processors stem from different architectural lineages. The Intel Core Ultra 7 265HX uses the Arrow Lake architecture, specifically the Arrow Lake-HX codename, and belongs to the Core Ultra Series 2. The Intel Core Ultra 7 356H uses the Panther Lake architecture, also its codename, and belongs to the Core Ultra Series 3. Both are fabricated on a 3 nm process node, but the foundries differ: TSMC produces the 265HX, while Intel produces the 356H.

The core configurations diverge significantly. The 265HX features 20 cores and 20 threads, while the 356H has 16 cores and 16 threads. Neither processor supports hyper-threading, as indicated by equal core and thread counts. The 265HX carries a transistor count of 17,800 million on a 243 mm² die, while the 356H's transistor count and die size are not recorded in the database.

Cache hierarchies show structural differences. Both processors allocate 192 KB of L1 cache per core. The L2 cache differs, with the 265HX providing 3 MB per core and the 356H providing 2.5 MB per core. The L3 cache also differs substantially: the 265HX has 30 MB shared, while the 356H has 18 MB shared. These cache differences contribute to the performance gap in memory-sensitive benchmarks, such as random string sorting, where the 265HX leads by 52.4%.

Memory support and PCIe capabilities also differentiate the two. The 265HX supports DDR5 memory, while the 356H supports both DDR5 and LPDDR5X. Both use a dual-channel memory bus. The 265HX has a memory bandwidth of 102.4 GB/s, while the 356H has a higher figure of 115.2 GB/s. PCIe connectivity favors the 265HX, which provides Gen 5 with 20 lanes, compared to the 356H's Gen 5 with 12 lanes.

Integrated graphics differ as well. The 265HX uses Arc Xe-LPG Graphics with 64 execution units, while the 356H uses Intel Xe3 Graphics. The 265HX has an unlocked multiplier, allowing overclocking, while the 356H's multiplier is locked. The sockets are incompatible: the 265HX uses Intel BGA 2114, and the 356H uses Intel BGA 2540.

Specification Differences

The core count is the most fundamental specification difference: 20 cores for the 265HX versus 16 cores for the 356H, with matching thread counts. Clock speeds favor the 265HX, which has a base clock of 2.60 GHz and a boost clock of 5.30 GHz, against the 356H's 1.90 GHz base and 4.70 GHz boost. The TDP reflects the performance hierarchy: 55 W for the 265HX and 25 W for the 356H.

Cache specifications differ in L2 and L3. The 265HX has 3 MB of L2 per core and 30 MB of shared L3, while the 356H has 2.5 MB of L2 per core and 18 MB of shared L3. L1 cache is identical at 192 KB per core. Memory bandwidth is higher on the 356H at 115.2 GB/s, versus 102.4 GB/s for the 265HX, despite the 265HX's superior benchmark performance.

PCIe lane count favors the 265HX, which offers 20 CPU lanes versus 12 for the 356H, both on Gen 5. The 265HX uses TSMC as its foundry, while the 356H uses Intel. The 265HX has an unlocked multiplier; the 356H does not. The release dates differ, with the 265HX appearing in January 2025 and the 356H in January 2026. The 265HX is part of Core Ultra Series 2, and the 356H is part of Core Ultra Series 3.

FAQ

Q: Which processor has a higher multi-core benchmark score?

A: The Intel Core Ultra 7 265HX dominates multi-core tests. In Cinebench R23 multi-core, it scores 40,642 versus 18,395 for the 356H, a 120.9% delta. This pattern holds across Cinebench R20 and R15 multi-core tests as well.

Q: How do the single-core performances compare?

A: The 265HX leads in every single-core benchmark. The largest gap is in Cinebench R23 single-core, where the 265HX scores 5,737 against 2,040, a 181.2% delta. PassMark single-thread shows a smaller but still significant 10.5% lead, with scores of 4,500 and 4,072.

Q: What are the core and thread counts for each processor?

A: The Intel Core Ultra 7 265HX has 20 cores and 20 threads. The Intel Core Ultra 7 356H has 16 cores and 16 threads. Neither processor uses hyper-threading, as core and thread counts are equal.

Q: What is the difference in power consumption?

A: The 265HX has a TDP of 55 W, while the 356H has a TDP of 25 W. This 30 W difference indicates that the 356H is designed for lower power draw, at the cost of significant performance, as shown by the 53.2% gap in average benchmark scores.

Q: Which processor supports a wider range of memory types?

A: The 356H supports both DDR5 and LPDDR5X memory, while the 265HX supports only DDR5. Both use a dual-channel memory bus. The 356H also has higher memory bandwidth at 115.2 GB/s, compared to 102.4 GB/s for the 265HX.

Q: Are the integrated graphics different?

A: Yes. The 265HX uses Arc Xe-LPG Graphics with 64 execution units, while the 356H uses Intel Xe3 Graphics. The database does not provide benchmark scores for either integrated GPU, so a performance comparison cannot be made from the recorded data.

Where Each One Wins

The Intel Core Ultra 7 265HX wins in all recorded benchmark categories. Its largest margins appear in Cinebench R23 single-core at 181.2% and Cinebench R23 multi-core at 120.9%. The 265HX also excels in PassMark tests, with leads of 56.7% in floating-point math, 52.8% in integer math, and 52.4% in random string sorting. Its average benchmark score of 63,173 and 93rd percentile ranking place it in a higher performance class.

The Intel Core Ultra 7 356H does not win any head-to-head benchmark, but its specification sheet offers advantages in specific areas. Its 25 W TDP makes it suitable for power-constrained mobile designs. Its memory bandwidth of 115.2 GB/s exceeds that of the 265HX, and its support for LPDDR5X memory provides flexibility for thin-and-light systems. Its 87th percentile ranking still indicates above-average performance among all CPUs, and its 16 cores handle moderate multi-threaded workloads without issue.

The closest benchmark margin, physics simulation at 2.9%, suggests that the 356H's architecture is comparatively efficient in that specific workload. The 41.2% delta in PassMark multi-thread and the 40.5% delta in Cinebench R20 multi-core highlight the performance cost of the 356H's lower TDP and core count. For users seeking maximum processing power, the 265HX is the clear choice. For users prioritizing low power consumption and memory flexibility, the 356H presents a viable alternative, accepting a substantial performance reduction.