Intel Core 7 251TE vs Intel Core Ultra 7 366H Comparison

The Intel Core 7 251TE and the Intel Core Ultra 7 366H represent two very different design philosophies from Intel, and the benchmark data reflects that clearly. The 251TE is a desktop part built on the older Bartlett Lake architecture with a massive core count, while the 366H is a mobile processor on the newer Panther Lake architecture with a higher clock speed and a much smaller footprint. Looking at the head-to-head results, the 366H wins 15 of the 17 benchmark comparisons, making it the overall performance leader in this matchup, but the 251TE has a few specific and significant victories that make it the right choice for certain workloads.

Head-to-Head Benchmarks

The most striking result is in the PassMark integer math test, where the Intel Core 7 251TE scores 125739 compared to the 366H’s 83695. That is a 50.2% advantage for the 251TE, and it is by far the largest delta in either direction across all benchmarks. The 251TE also wins the data compression test with a score of 334399 versus 327455, a smaller but still decisive 2.1% lead. These two wins suggest that the 251TE’s high core and thread count (24 cores and 32 threads) gives it a serious edge in workloads that scale with raw integer throughput and data packing.

Every other benchmark in the suite goes to the Intel Core Ultra 7 366H. In the Cinebench tests, the 366H consistently leads by about 10.4% across the board: R15 multicore is 2870 versus 2572, R20 multicore is 11960 versus 10717, and R23 multicore is 28477 versus 25518. Single-core Cinebench results are similarly lopsided, with the 366H scoring 405 versus 362 in R15, 1688 versus 1512 in R20, and 4020 versus 3602 in R23, all showing a 10.4% to 10.6% edge. The 366H’s higher base clock of 2.00 GHz and boost clock of 4.80 GHz, combined with its newer architecture, clearly pays off in these rendering and simulation tasks.

The 366H’s advantage extends into several PassMark sub-tests with varying margins. The extended instructions test shows a massive 36.9% lead for the 366H (26901 versus 16974), indicating that its Panther Lake architecture handles AVX and other SIMD workloads far more efficiently. The physics test is another big win, with the 366H scoring 2880 versus 1938, a 32.7% difference. Floating point math also favors the 366H at 103615 versus 85607, a 17.4% lead. Data encryption goes to the 366H at 25845 versus 22176, a 14.2% gap. Even the find prime numbers test, which is often a good indicator of pure integer performance, heavily favors the 366H at 326 versus 140, a 57.1% difference that seems to contradict the integer math result.

The multi-threaded PassMark score is close but still a win for the 366H: 33429 versus 30022, a 10.2% difference. The single-thread score follows the same pattern, with the 366H at 4043 versus 3568, an 11.7% lead. The random string sorting test is nearly a tie, with the 366H winning by only 0.4% (39814 versus 39643). Overall, the 366H’s wins are not just numerous; they are often substantial, particularly in encryption, extended instructions, and physics simulations.

The Verdict

The data makes the choice clear for most users: the Intel Core Ultra 7 366H is the stronger processor in the vast majority of scenarios. It wins 15 out of 17 benchmarks, and its victories are not narrow squeaks but consistent double-digit margins in rendering, single-threaded tasks, encryption, and physics. If you are building a system for general productivity, content creation, or any workload that involves modern instruction sets, the 366H is the better buy. Its 87th percentile ranking versus all CPUs, while slightly lower than the 251TE’s 88th percentile, is backed by an average benchmark score of 41263, which is only slightly below the 251TE’s 41650.

The Intel Core 7 251TE is not a bad processor, but its appeal is narrow. Its 50.2% lead in integer math and 2.1% lead in data compression are significant, but they are the only two areas where it beats the 366H. The 251TE’s 88th percentile ranking and higher average score of 41650 come from its raw core count, which helps in specific workloads but does not translate to overall superiority. If you absolutely need maximum integer throughput for a specific application, the 251TE is the pick, but that is a niche use case. For everyone else, the 366H is the more balanced and faster processor.

Where Each One Wins

The Intel Core 7 251TE wins in workloads that are heavily dependent on integer arithmetic and data manipulation without relying on advanced instruction sets. The PassMark integer math score of 125739 is the standout, and the data compression score of 334399 reinforces this. These results point to tasks like database indexing, certain types of compression algorithms, and legacy applications that do not use modern SIMD extensions. The 251TE’s 24 cores and 32 threads at a 45W TDP are clearly being utilized effectively in these parallel integer-heavy scenarios.

The Intel Core Ultra 7 366H wins in almost everything else. The Cinebench R23 multi-core score of 28477 versus 25518 makes it the better choice for 3D rendering, video encoding, and any multi-threaded creative workload. The single-core scores, particularly the R23 score of 4020, indicate superior responsiveness in everyday tasks and lightly-threaded applications. The extended instructions score of 26901 is a clear signal that modern software leveraging AVX-512 or similar instructions will run significantly faster on the 366H. The physics score of 2880 and the encryption score of 25845 also make the 366H the better option for scientific computing and security-related tasks. The 366H’s 3 nm process node and newer Panther Lake architecture give it a fundamental efficiency and instruction-level advantage over the 10 nm Bartlett Lake part.

FAQ

Q: Which processor is faster in multi-core rendering?

A: The Intel Core Ultra 7 366H is faster. In Cinebench R23 multi-core, it scores 28477 versus the 251TE’s 25518, a 10.4% advantage. The same margin holds in R20 (11960 vs 10717) and R15 (2870 vs 2572).

Q: Does the Intel Core 7 251TE have any advantages over the 366H?

A: Yes, in two specific areas. It wins PassMark integer math with a score of 125739 versus 83695, a 50.2% lead, and it wins data compression with 334399 versus 327455, a 2.1% lead.

Q: How much better is the 366H in single-threaded performance?

A: The 366H leads by roughly 10.4% to 11.7% across all single-core tests. In Cinebench R23 single-core, it scores 4020 versus 3602, and in PassMark single-thread, it scores 4043 versus 3568.

Q: Which CPU has more cores and threads?

A: The Intel Core 7 251TE has significantly more, with 24 cores and 32 threads. The Intel Core Ultra 7 366H has 16 cores and 16 threads.

Q: What is the difference in their memory bandwidth?

A: The Intel Core Ultra 7 366H has higher memory bandwidth at 115.2 GB/s, while the Intel Core 7 251TE offers 89.6 GB/s. Both support dual-channel memory.

Q: Which processor is better for encryption and physics workloads?

A: The Intel Core Ultra 7 366H is clearly better. It scores 25845 in data encryption versus 22176, a 14.2% lead, and 2880 in physics versus 1938, a 32.7% lead.

Architecture Differences

The two processors are built on fundamentally different architectures and process nodes. The Intel Core 7 251TE uses the Bartlett Lake architecture and is fabricated on a 10 nm process node, while the Intel Core Ultra 7 366H uses the newer Panther Lake architecture on a 3 nm process node. This node difference is a major factor in the 366H’s efficiency and performance per watt, even though the 251TE has a higher TDP of 45W compared to the 366H’s 25W. The 251TE has a larger die size of 215 mm², while the 366H’s die size is not specified in the data.

The cache hierarchy is also notably different. The 251TE has 80 KB of L1 cache per core and 1.25 MB of L2 cache per core, with a shared 36 MB L3 cache. The 366H has larger per-core caches, with 192 KB of L1 and 2.5 MB of L2, but a smaller shared L3 cache at 18 MB. This suggests the 366H is designed for lower latency per core, while the 251TE leans on a larger shared pool for its many cores. The 251TE also supports ECC memory, which the 366H does not, making the 251TE more suitable for error-sensitive workloads.

Another key architectural difference is in the integrated graphics. The 251TE ships with UHD Graphics 770, while the 366H features the newer Intel Xe3 Graphics. The PCIe support also differs, with the 251TE offering Gen 5 with 16 lanes, while the 366H offers Gen 5 with only 12 lanes, a distinction that matters for expansion in a desktop versus a mobile context. The 251TE is a desktop part on Intel Socket 1700, whereas the 366H is a mobile part on Intel BGA 2540.

Specification Differences

The most obvious specification difference is the core and thread count: the Intel Core 7 251TE has 24 cores and 32 threads, while the Intel Core Ultra 7 366H has 16 cores and 16 threads. The 366H compensates with higher clock speeds, starting at a base of 2.00 GHz and boosting to 4.80 GHz, compared to the 251TE’s base of 1.40 GHz and boost of 5.40 GHz. The 251TE has the higher boost clock, but the 366H has a much higher base clock, which contributes to its better single-threaded performance.

The TDP is another clear differentiator: the 251TE is rated at 45W, while the 366H is rated at 25W, making the latter much more power-efficient for mobile use. The memory support differs as well, with the 251TE supporting both DDR4 and DDR5, while the 366H supports DDR5 and LPDDR5X. The 366H also has higher memory bandwidth at 115.2 GB/s versus the 251TE’s 89.6 GB/s. The 251TE supports ECC memory, a feature absent on the 366H. The launch MSRP for the 251TE is $384, while the 366H has no launch MSRP listed. The release dates also differ, with the 251TE launching on 2025-01-12 and the 366H launching on 2026-01-04. The 251TE has a part number of SRQAXQ5ZG, while the 366H has a part number of SA4R9Q9EL.