Intel Core 7 251TE vs Intel Core Ultra 7 356H Comparison

The Intel Core 7 251TE and Intel Core Ultra 7 356H represent two distinct design philosophies from Intel, with the former being a desktop-oriented 24-core processor built on a mature 10 nm node and the latter a mobile-focused 16-core part on a advanced 3 nm process. Benchmark data reveals a complex picture: the Core Ultra 7 356H wins 13 of 17 head-to-head comparisons, yet the Core 7 251TE secures the most decisive victories in specific multi-threaded and integer workloads. The overall average benchmark scores are remarkably close, with the 251TE at 41650 and the 356H at 41215, placing them within 1.1% of each other, but their performance profiles diverge sharply across different test types.

Head-to-Head Benchmarks

The most striking single result is in Cinebench R23 multi-core, where the Intel Core 7 251TE posts a score of 25518 against the 356H’s 18395, a 38.7% advantage. This is a massive gap that highlights the 251TE’s core-count advantage in sustained rendering workloads. Even more dramatic is the Cinebench R23 single-core result, where the 251TE scores 3602 versus 2040 for the 356H, a 76.6% lead. That delta is unusually large for single-threaded performance and suggests the 251TE’s 5.40 GHz boost clock provides a substantial edge over the 356H’s 4.70 GHz in lightly-threaded tasks.

However, the 356H dominates in the older Cinebench R15 and R20 suites. In R15 multi-core, the 356H scores 3055 against 2572 for the 251TE, a 15.8% win. The R20 multi-core test shows a similar pattern, with the 356H at 12153 versus 10717, an 11.8% margin. The R20 single-core test also goes to the 356H, scoring 1715 against 1512, another 11.8% lead. This reversal between R23 and the older R15/R20 tests indicates that the 356H scales better in certain algorithmic conditions, while the 251TE excels in the specific workload of R23.

In PassMark tests, the 356H wins the majority but not by overwhelming margins. Data encryption favors the 356H at 26345 versus 22176, a 15.8% edge. Extended instructions show a 39.2% lead for the 356H (27898 vs 16974), and find prime numbers goes to the 356H by 57.2% (327 vs 140). Floating point math also favors the 356H, scoring 103128 against 85607, a 17% difference. The 356H wins multithread at 33978 versus 30022 (11.6%), physics at 2895 versus 1938 (33.1%), and single-thread at 4072 versus 3568 (12.4%). Data compression is nearly identical, with the 356H at 336177 and the 251TE at 334399, a difference of just 0.5%.

The 251TE’s other major win is in PassMark integer math, where it scores 125739 against 83111, a 51.3% advantage. Random string sorting also goes to the 356H, but only by 3.3% (40990 vs 39643). The overall win tally is 13-4 in favor of the 356H, but the magnitude of the 251TE’s victories in R23 and integer math means the average scores remain nearly equal.

Architecture Differences

The fundamental architectural split is evident in core counts and process technology. The Intel Core 7 251TE uses 24 cores and 32 threads, built on Intel’s 10 nm process with a 215 mm² die size. It is based on the Bartlett Lake codename and fits the Intel Socket 1700 platform. In contrast, the Intel Core Ultra 7 356H has 16 cores and 16 threads, manufactured on a 3 nm process, and uses the Panther Lake architecture with an Intel BGA 2540 socket. The 356H belongs to the Core Ultra Series 3 generation, while the 251TE is from the Core 7 (Bartlett Lake) generation.

Cache configurations differ significantly. The 251TE provides 80 KB of L1 per core, 1.25 MB of L2 per core, and 36 MB of shared L3 cache. The 356H offers more per-core cache: 192 KB of L1 per core and 2.5 MB of L2 per core, but only 18 MB of shared L3. This means the 251TE has double the total L3 capacity, which likely contributes to its strong performance in R23 multi-core, while the 356H’s larger per-core L1 and L2 help with latency-sensitive single-threaded operations.

Memory support also differs. The 251TE supports both DDR4 and DDR5 memory with a dual-channel bus and a peak bandwidth of 89.6 GB/s, and it includes ECC memory support. The 356H supports DDR5 and LPDDR5X, also dual-channel, but with a higher bandwidth of 115.2 GB/s and no ECC support. PCIe configurations vary as well: the 251TE offers Gen 5 with 16 CPU lanes, while the 356H provides Gen 5 with 12 CPU lanes. Integrated graphics differ, with the 251TE using UHD Graphics 770 and the 356H using Intel Xe3 Graphics. The 251TE has a TDP of 45 W and a launch MSRP of $384, while the 356H has a lower TDP of 25 W and no listed launch MSRP.

Where Each One Wins

The Intel Core 7 251TE is the clear choice for workloads that depend on raw multi-threaded throughput and high clock speeds. Its 38.7% lead in Cinebench R23 multi-core and 51.3% lead in PassMark integer math point to strengths in rendering, compile tasks, and general computational math. The 76.6% single-core advantage in R23 suggests it handles legacy or lightly-threaded applications with exceptional responsiveness, likely due to its 5.40 GHz boost clock. This processor makes sense for desktop users who need maximum performance in threaded productivity and are willing to accept higher power consumption.

The Intel Core Ultra 7 356H wins the majority of tests, particularly in PassMark’s diverse set of operations. Its 57.2% lead in find prime numbers and 39.2% lead in extended instructions indicate strong cryptographic and SIMD performance. The 33.1% physics advantage and 15.8% encryption lead suggest it is well-suited for scientific simulations and security-related tasks. The 356H also wins the newer single-thread PassMark test by 12.4%, which contrasts with its R23 single-core loss, indicating different microarchitectural strengths. Its lower 25 W TDP and mobile socket make it the obvious pick for laptops and portable systems where efficiency matters.

The data shows a split: the 251TE dominates in Cinebench R23 and integer math, while the 356H excels in most PassMark sub-tests and the older Cinebench versions. Users running modern rendering software that resembles R23 should prefer the 251TE. Those in fields like data encryption, physics simulation, or general-purpose computing with diverse instruction mixes will find the 356H more consistent.

FAQ

Q: Which processor has a higher multi-core performance in Cinebench R23?

A: The Intel Core 7 251TE scores 25518 versus 18395 for the Core Ultra 7 356H, a 38.7% advantage.

Q: Does the Core Ultra 7 356H win in any multi-core test?

A: Yes, it wins in Cinebench R15 multi-core (3055 vs 2572, 15.8%) and R20 multi-core (12153 vs 10717, 11.8%), as well as PassMark multithread (33978 vs 30022, 11.6%).

Q: What is the single-thread performance difference?

A: In Cinebench R23 single-core, the 251TE leads by 76.6% (3602 vs 2040). However, in PassMark single-thread, the 356H wins by 12.4% (4072 vs 3568).

Q: How do the core counts and cache sizes compare?

A: The 251TE has 24 cores and 32 threads with 36 MB of shared L3 cache. The 356H has 16 cores and 16 threads with 18 MB of shared L3. Per-core cache is larger on the 356H: 192 KB L1 and 2.5 MB L2, versus 80 KB L1 and 1.25 MB L2 on the 251TE.

Q: Which processor supports ECC memory?

A: Only the Intel Core 7 251TE supports ECC memory. The Core Ultra 7 356H does not.

Q: What are the TDP and process node differences?

A: The 251TE has a TDP of 45 W and uses a 10 nm process. The 356H has a TDP of 25 W and uses a 3 nm process.

Specification Differences

• Cores: 24 (251TE) vs 16 (356H)
• Threads: 32 (251TE) vs 16 (356H)
• Base Clock: 1.40 GHz (251TE) vs 1.90 GHz (356H)
• Boost Clock: 5.40 GHz (251TE) vs 4.70 GHz (356H)
• TDP: 45 W (251TE) vs 25 W (356H)
• Socket: Intel Socket 1700 (251TE) vs Intel BGA 2540 (356H)
• Codename: Bartlett Lake (251TE) vs Panther Lake (356H)
• Process Node: 10 nm (251TE) vs 3 nm (356H)
• Die Size: 215 mm² (251TE) vs not specified (356H)
• L1 Cache: 80 KB per core (251TE) vs 192 KB per core (356H)
• L2 Cache: 1.25 MB per core (251TE) vs 2.5 MB per core (356H)
• L3 Cache: 36 MB shared (251TE) vs 18 MB shared (356H)
• Memory Support: DDR4, DDR5 (251TE) vs DDR5, LPDDR5X (356H)
• Memory Bandwidth: 89.6 GB/s (251TE) vs 115.2 GB/s (356H)
• ECC Memory: Yes (251TE) vs No (356H)
• PCIe Lanes: 16 (251TE) vs 12 (356H)
• Integrated Graphics: UHD Graphics 770 (251TE) vs Intel Xe3 Graphics (356H)
• Market Segment: Desktop (251TE) vs Mobile (356H)
• Release Date: 2025-01-12 (251TE) vs 2026-01-04 (356H)
• Launch MSRP: $384 (251TE) vs not specified (356H)

The Verdict

The benchmark data presents a nuanced recommendation. For desktop users prioritizing maximum multi-threaded render performance and integer-heavy workloads, the Intel Core 7 251TE is the superior choice, backed by a 38.7% lead in Cinebench R23 multi-core and a 51.3% edge in PassMark integer math. Its higher 5.40 GHz boost clock also delivers a 76.6% advantage in R23 single-core, making it exceptional for legacy applications. The 45 W TDP and Socket 1700 compatibility suit stationary systems where power draw is less critical.

For mobile users or those needing a balanced, efficient processor, the Intel Core Ultra 7 356H is the better option. It wins 13 of 17 comparisons, with notable strengths in encryption (15.8%), extended instructions (39.2%), and physics (33.1%). Its 25 W TDP and 3 nm process make it far more power-efficient, and the higher memory bandwidth of 115.2 GB/s supports faster data-intensive tasks. The 356H also edges out the 251TE in overall PassMark multithread (33978 vs 30022) and single-thread (4072 vs 3568), despite losing the R23 single-core test. Given the near-identical average scores (41650 vs 41215), the decision hinges on workload type and form factor: raw desktop throughput versus mobile efficiency and broader PassMark consistency.