Intel Core 7 251TE vs Intel Core Ultra X7 358H Comparison

Intel Core 7 251TE and Intel Core Ultra X7 358H represent two distinct Intel design philosophies, with the former as a desktop-focused Bartlett Lake part and the latter as a mobile Panther Lake-H processor. The benchmark data reveals a clear split: the Ultra X7 358H wins 12 of 17 head-to-head tests, while the Core 7 251TE takes 5 decisive victories, often by substantial margins. This analysis walks through the raw scores, architectural underpinnings, and practical implications of each processor's strengths.

Head-to-Head Benchmarks

The most dramatic divergence appears in Cinebench testing. In Cinebench R23 multi-core, the Core 7 251TE scores 25,518 against the Ultra X7 358H's 18,747, a 36.1% advantage. The single-core gap is even larger: the 251TE posts 3,602 versus 2,080, a 73.2% lead. However, this pattern reverses in older Cinebench versions. In R15 multi-core, the Ultra X7 358H wins 3,027 to 2,572 (-15% delta), and in R20 multi-core it leads 12,011 to 10,717 (-10.8%). Even more curious, the R20 single-core test favors the Ultra X7 358H at 1,695 versus 1,512 (-10.8%), contradicting the R23 single-core result where the 251TE dominates.

PassMark tests show a similar split. The Core 7 251TE wins integer math decisively at 125,739 versus 83,147, a 51.2% margin. It also edges out data compression at 334,399 versus 332,508, a slim 0.6% win. The Ultra X7 358H counters with strong showings in extended instructions (27,274 versus 16,974, a 37.8% lead), find prime numbers (337 versus 140, a 58.5% lead), and floating point math (103,842 versus 85,607, a 17.6% lead). The mobile chip also wins data encryption (26,046 versus 22,176, a 14.9% lead), physics (3,021 versus 1,938, a 35.8% lead), and multithread (33,802 versus 30,022, an 11.2% lead). Single-thread performance favors the Ultra X7 358H at 4,124 versus 3,568, a 13.5% advantage.

Looking at overall averages, the Core 7 251TE holds an average benchmark score of 41,650, placing it in the 88th percentile of all CPUs. The Ultra X7 358H averages 40,967, sitting in the 87th percentile. The nearest rival data clarifies positioning: the 251TE is within 0.1% of the Intel Core Ultra 7 265H (41,621) and 0.2% of the Intel Core i7-14650HX (41,576), while trailing the Intel Core i7-14700T by 0.6%. The Ultra X7 358H sits within 0.6% of the AMD Ryzen AI 5 PRO 440 (41,208) and Intel Core Ultra 7 356H (41,215), and is 0.6% ahead of the AMD Ryzen AI 5 PRO 435G (40,718).

Architecture Differences

The architectural gap is substantial. The Core 7 251TE uses Bartlett Lake on a 10 nm Intel process, while the Ultra X7 358H employs Panther Lake on a 3 nm node. This explains the power and efficiency differences: the 251TE runs at a 45 W TDP, whereas the Ultra X7 358H draws only 25 W. The desktop part features 24 cores and 32 threads, compared to 16 cores and 16 threads on the mobile chip. Notably, the Ultra X7 358H has no hyper-threading, which directly impacts its multi-threaded performance in certain workloads.

Cache hierarchies differ significantly. The Core 7 251TE provides 80 KB of L1 per core, 1.25 MB of L2 per core, and 36 MB of shared L3 cache. The Ultra X7 358H counters with 192 KB L1 per core, 3 MB L2 per core, but only 18 MB of L3. The larger L3 on the 251TE likely contributes to its Cinebench R23 multi-core lead, while the smaller per-core L2 on the desktop part may hinder certain single-threaded tasks. The Ultra X7 358H's larger L1 and L2 per core help explain its PassMark single-thread win.

Memory support also diverges. The 251TE supports DDR4 and DDR5 with dual-channel memory and 89.6 GB/s bandwidth, plus ECC memory. The Ultra X7 358H supports LPDDR5X with dual-channel and 153.6 GB/s bandwidth, but no ECC. The mobile chip's higher memory bandwidth (153.6 GB/s versus 89.6 GB/s) likely boosts its data encryption and extended instruction scores. PCIe lanes differ as well: the 251TE offers Gen 5 with 16 lanes, while the Ultra X7 358H provides Gen 5 with only 4 lanes. The integrated graphics are also distinct: UHD Graphics 770 on the desktop part versus Arc B390 on the mobile chip.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core 7 251TE averages 41,650 across all benchmarks, while the Intel Core Ultra X7 358H averages 40,967. The 251TE also ranks in the 88th percentile versus the Ultra X7's 87th.

Q: Why does the Core 7 251TE win Cinebench R23 but lose R15 and R20?

A: The data shows a 36.1% lead in R23 multi-core for the 251TE, but the Ultra X7 358H wins R15 multi-core by 15% and R20 multi-core by 10.8%. This suggests workload-specific scaling differences tied to the core counts and cache configurations.

Q: What is the biggest single-benchmark margin between the two?

A: The largest delta is in Cinebench R23 single-core, where the Core 7 251TE leads by 73.2% (3,602 versus 2,080). The second-largest is PassMark find prime numbers, where the Ultra X7 358H leads by 58.5% (337 versus 140).

Q: Does the Ultra X7 358H always win single-threaded tests?

A: No. The Ultra X7 358H wins PassMark single-thread (4,124 versus 3,568) and R20 single-core (1,695 versus 1,512), but the Core 7 251TE wins R15 single-core (362 versus 301.5) and R23 single-core (3,602 versus 2,080).

Q: How do the two compare in power consumption?

A: The Core 7 251TE has a 45 W TDP, while the Ultra X7 358H has a 25 W TDP. The mobile chip is designed for lower power draw, which aligns with its mobile market segment.

Q: What are the release dates?

A: The Core 7 251TE was released on January 12, 2025, with a launch MSRP of $384. The Ultra X7 358H was released on January 4, 2026, with no launch MSRP provided.

The Verdict

The data points to a clear role separation. The Intel Core 7 251TE is the stronger choice for heavily multi-threaded desktop workloads that benefit from its 24 cores, 32 threads, and 36 MB L3 cache. Its 36.1% lead in Cinebench R23 multi-core and 51.2% advantage in integer math make it suitable for rendering, compilation, and simulation tasks. The 73.2% R23 single-core win is anomalous but indicates strong per-core performance in specific scenarios.

The Intel Core Ultra X7 358H is better suited for mobile and efficiency-constrained environments. Its 25 W TDP, 3 nm process, and higher memory bandwidth (153.6 GB/s) give it advantages in encryption, extended instructions, and floating-point math. The 58.5% lead in find prime numbers and 37.8% lead in extended instructions suggest strong cryptographic and SIMD performance. For users prioritizing battery life or compact systems, the Ultra X7 358H's wins in PassMark multithread (33,802 versus 30,022) and physics (3,021 versus 1,938) are notable.

Neither chip dominates universally. The 251TE wins 5 of 17 head-to-head tests, while the Ultra X7 358H wins 12. However, the wins are asymmetric: the 251TE's victories tend to be larger (average delta of winning tests is 36.2%), while the Ultra X7 358H wins by smaller but more frequent margins (average delta of -20.5%). The choice depends on whether the user needs extreme multi-core throughput or balanced, efficient performance across a wider range of tasks.

Specification Differences

| Specification | Intel Core 7 251TE | Intel Core Ultra X7 358H |

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

| Cores | 24 | 16 |

| Threads | 32 | 16 |

| Base Clock | 1.40 GHz | 1.90 GHz |

| Boost Clock | 5.40 GHz | 4.80 GHz |

| TDP | 45 W | 25 W |

| Socket | Intel Socket 1700 | Intel BGA 2540 |

| Codename | Bartlett Lake | Panther Lake |

| Process Node | 10 nm | 3 nm |

| Die Size | 215 mm² | Not provided |

| L1 Cache | 80 KB (per core) | 192 KB (per core) |

| L2 Cache | 1.25 MB (per core) | 3 MB (per core) |

| L3 Cache | 36 MB (shared) | 18 MB (shared) |

| Memory Support | DDR4, DDR5 | LPDDR5X |

| Memory Bandwidth | 89.6 GB/s | 153.6 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 5, 16 Lanes | Gen 5, 4 Lanes |

| Integrated Graphics | UHD Graphics 770 | Arc B390 |

| Market Segment | Desktop | Mobile |

| Release Date | 2025-01-12 | 2026-01-04 |

| Launch MSRP | $384 | Not provided |

| Part Number | SRQAXQ5ZG | SA4RAQ9ET |

Where Each One Wins

Intel Core 7 251TE wins in scenarios requiring raw multi-core throughput with high thread counts. The 32 threads and 36 MB L3 cache deliver a 36.1% advantage in Cinebench R23 multi-core and a 51.2% lead in integer math. It also wins data compression by a hair (0.6%) and R15 single-core by 20.1%. This chip is suited for desktop workstations handling video encoding, 3D rendering, or software compilation where the 45 W TDP is acceptable. Its ECC memory support and Gen 5 PCIe with 16 lanes make it appropriate for professional environments needing data integrity and expansion.

Intel Core Ultra X7 358H wins in efficiency-sensitive and specialized compute tasks. Its 25 W TDP and 3 nm process allow sustained performance in thin-and-light laptops. The 58.5% lead in find prime numbers and 37.8% lead in extended instructions point to strong cryptography and AVX-512-like workloads. The 153.6 GB/s memory bandwidth supports its 14.9% win in data encryption and 17.6% win in floating-point math. For general productivity, the 13.5% single-thread advantage and 11.2% multithread lead make it a more balanced daily driver. The Arc B390 integrated graphics also provide a more capable iGPU than UHD Graphics 770, though no direct benchmark data is provided for either. Users needing a mobile processor with lower power draw and faster memory access should choose the Ultra X7 358H.