Intel Core 7 251TE vs Intel Core Ultra 7 265H Comparison

The Intel Core 7 251TE and Intel Core Ultra 7 265H are two very different Intel processors that land in nearly the same performance bracket. The 251TE is a 45W desktop chip (launch MSRP $384) built on Intel’s 10nm process, while the 265H is a 28W mobile part built on TSMC’s 3nm node. Despite the architectural gulf, their average benchmark scores are almost identical: the 251TE averages 41650, and the 265H averages 41621, a difference of just 0.1%. The data shows a classic desktop-versus-mobile trade-off, where raw multi-threaded throughput and single-core speed clash with efficiency and specialized workload acceleration. The 251TE wins 4 of 17 head-to-head tests, while the 265H takes 13, but the wins are heavily skewed by workload type. This analysis breaks down exactly where each chip dominates and which user should pick which.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251TE has 24 cores and 32 threads, while the Intel Core Ultra 7 265H has 16 cores and 16 threads. The 251TE offers 8 more cores and 16 more threads, which explains its advantage in certain multi-threaded workloads.

Q: How do their single-core performances compare?

A: The results are mixed across test suites. In Cinebench R15 single-core, the 251TE wins with a score of 362 versus 307 for the 265H, a 17.9% advantage. However, in Cinebench R20 single-core and Passmark single-thread, the 265H wins with scores of 1712 and 4334 respectively, beating the 251TE by 11.7% and 17.7%. The 251TE also dominates Cinebench R23 single-core, scoring 3602 versus 2080, a massive 73.2% lead.

Q: Which chip is better for multi-core rendering?

A: It depends on the benchmark version. The 265H wins Cinebench R15 multi-core (2989 vs 2572, +14%) and R20 multi-core (12131 vs 10717, +11.7%). The 251TE wins Cinebench R23 multi-core decisively, scoring 25518 versus 19940, a 28% lead. Passmark multithread favors the 265H, which scores 34027 versus 30022, an 11.8% margin.

Q: What are the memory bandwidth differences?

A: The 265H has a clear edge in memory bandwidth, rated at 102.4 GB/s, compared to 89.6 GB/s for the 251TE. Both support dual-channel memory, but the 265H supports DDR5 and LPDDR5X, while the 251TE supports DDR4 and DDR5.

Q: Do both processors support ECC memory?

A: Yes, both the Intel Core 7 251TE and the Intel Core Ultra 7 265H list ECC memory support as a feature. This is notable for workstation-oriented builds, though the 251TE is a desktop part and the 265H is a mobile part.

Q: Which chip has a higher boost clock?

A: The 251TE has a higher boost clock at 5.40 GHz, compared to 5.30 GHz for the 265H. The 265H has a higher base clock at 2.20 GHz versus 1.40 GHz for the 251TE.

Architecture Differences

The two processors represent fundamentally different design philosophies from Intel. The Core 7 251TE is a desktop chip on the Intel Socket 1700 platform, codenamed Bartlett Lake, and built on Intel’s 10nm process. It has a die size of 215 mm² and uses a 24-core, 32-thread configuration. The Core Ultra 7 265H, in contrast, is a mobile chip on the Intel BGA 2049 socket, using the Arrow Lake-H architecture and manufactured by TSMC on a 3nm process. This node advantage gives the 265H a significantly smaller and more power-efficient design, reflected in its 28W TDP versus the 251TE’s 45W TDP.

Cache layouts differ substantially. The 251TE has 80 KB of L1 cache per core, 1.25 MB of L2 per core, and a large 36 MB shared L3 cache. The 265H has much larger per-core caches: 192 KB L1 per core and 3 MB L2 per core, but a smaller 24 MB shared L3. This means the 265H has more cache closer to each core, which helps with latency-sensitive workloads, while the 251TE has more total L3, which aids in shared-data scenarios across its many threads.

Memory support is another differentiator. The 251TE supports both DDR4 and DDR5, while the 265H supports DDR5 and LPDDR5X. The 265H also has higher peak memory bandwidth at 102.4 GB/s versus 89.6 GB/s. PCIe lanes also differ: the 251TE offers Gen 5 with 16 lanes (CPU only), while the 265H offers Gen 5 with only 8 lanes. Integrated graphics are different as well, with the 251TE featuring UHD Graphics 770, while the 265H has the more advanced Arc Graphics 140T. Both are active production parts released on the same date, 2025-01-12.

Head-to-Head Benchmarks

The benchmark data reveals a clear split between traditional CPU tasks and specialized instruction workloads. Starting with Cinebench, the 265H takes the lead in R15 multi-core with 2989 versus 2572, a 14% margin. It also wins R20 multi-core, scoring 12131 against 10717, an 11.7% edge. However, in R23 multi-core, the 251TE strikes back with a massive 28% win, scoring 25518 versus 19940. The single-core results are even more polarized. The 251TE wins R15 single-core by 17.9% (362 vs 307) and R23 single-core by a colossal 73.2% (3602 vs 2080). The 265H takes R20 single-core, winning 1712 versus 1512, an 11.7% margin.

Passmark results heavily favor the 265H in most categories. The 265H wins data compression (334711 vs 334399, +0.1%), data encryption (26005 vs 22176, +14.7%), extended instructions (26805 vs 16974, +36.7%), find prime numbers (335 vs 140, +58.2%), floating point math (109123 vs 85607, +21.5%), multithread (34027 vs 30022, +11.8%), physics (2497 vs 1938, +22.4%), random string sorting (40742 vs 39643, +2.7%), and single-thread (4334 vs 3568, +17.7%). The 251TE wins only one Passmark test: integer math, where it scores 125739 versus 85479, a dominant 47.1% lead. This gives the 265H a 13-4 win tally in head-to-head tests, but the 251TE’s wins are often by larger margins in the tests it takes.

The Verdict

The data points to two distinct user profiles. The Intel Core Ultra 7 265H is the better all-round performer for most applications, winning 13 of 17 benchmarks. Its strengths lie in encryption, floating-point math, physics, and single-threaded Passmark tasks, making it a strong choice for mobile workstations and content creation on the go. It also has a lower 28W TDP, which means less heat and better battery life in laptops. The 265H’s higher memory bandwidth and larger per-core cache support its wins in data-heavy tasks.

The Intel Core 7 251TE is the specialist for integer-heavy and specific rendering workloads. Its 47.1% win in integer math and 73.2% win in Cinebench R23 single-core are standout results, suggesting it excels in code compilation, spreadsheet calculations, and certain CAD or simulation tasks. The 251TE also has a higher boost clock (5.40 GHz) and more PCIe lanes (16 vs 8), which benefits desktop builds with multiple GPUs or NVMe drives. Its 45W TDP is higher, but the desktop platform allows for better cooling. Pick the 251TE if you prioritize integer math and Cinebench R23 performance; pick the 265H for virtually everything else.

Specification Differences

| Specification | Intel Core 7 251TE | Intel Core Ultra 7 265H |

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

| Cores | 24 | 16 |

| Threads | 32 | 16 |

| Base Clock | 1.40 GHz | 2.20 GHz |

| Boost Clock | 5.40 GHz | 5.30 GHz |

| TDP | 45W | 28W |

| Socket | Intel Socket 1700 | Intel BGA 2049 |

| Codename | Bartlett Lake | Arrow Lake-H |

| Process Node | 10 nm | 3 nm |

| Foundry | Intel | TSMC |

| Die Size | 215 mm² | N/A |

| 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) | 24 MB (shared) |

| Memory Support | DDR4, DDR5 | DDR5, LPDDR5X |

| Memory Bandwidth | 89.6 GB/s | 102.4 GB/s |

| PCIe | Gen 5, 16 Lanes (CPU only) | Gen 5, 8 Lanes (CPU only) |

| Integrated Graphics | UHD Graphics 770 | Arc Graphics 140T |

| Market Segment | Desktop | Mobile |

| Launch MSRP | $384 | N/A |

Where Each One Wins

The Core Ultra 7 265H wins in scenarios that benefit from modern instruction sets and efficient multi-threading. Its 36.7% lead in extended instructions and 58.2% lead in find prime numbers indicate strong SIMD and cryptographic performance. The 265H is the clear choice for data encryption (14.7% faster), floating-point math (21.5% faster), and physics simulations (22.4% faster). Its 17.7% advantage in single-threaded Passmark also makes it better for general desktop responsiveness and lightly-threaded applications like web browsing or office suites. The 265H’s 11.8% lead in Passmark multithread shows it handles typical multi-core workloads—like video encoding or 3D rendering in Blender—more consistently across test suites, despite losing Cinebench R23.

The Core 7 251TE wins where raw integer throughput and specific single-core bursts matter. Its 47.1% win in integer math is the largest margin in any test, making it superior for database operations, financial modeling, and legacy software that relies on integer arithmetic. The 251TE’s 73.2% victory in Cinebench R23 single-core is anomalous, suggesting it has a unique advantage in that specific rendering engine, possibly tied to its higher boost clock of 5.40 GHz. The 251TE also wins Cinebench R23 multi-core by 28%, which may appeal to users running that specific benchmark for validation. For a desktop workstation with a focus on integer-heavy code and large L3 cache (36 MB), the 251TE is the better fit.