Intel Core 7 251E vs Intel Core Ultra 5 236V Comparison

Intel Core 7 251E and Intel Core Ultra 5 236V are two very different processors from the same manufacturer, aimed at entirely separate market segments. The Core 7 251E is a 65-watt desktop part built for Socket 1700, while the Core Ultra 5 236V is a 17-watt mobile chip soldered to BGA 2833. The recorded data shows the desktop chip uses a 24-core design with 32 threads, while the mobile chip uses 8 cores and 8 threads. These are not direct competitors, but comparing them reveals how Intel positions its desktop and mobile lineups.

Where Each One Wins

The Intel Core 7 251E wins decisively in multi-threaded workloads. Its 24 cores and 32 threads give it a massive parallel processing advantage over the 8-core, 8-thread Core Ultra 5 236V. The desktop part also offers a higher boost clock of 5.60 GHz versus 4.70 GHz on the mobile chip, which helps in bursty single-threaded tasks. The Core 7 251E further stands out with ECC memory support, a feature absent on the Core Ultra 5 236V, making it suitable for reliability-focused desktop builds.

The Intel Core Ultra 5 236V wins in efficiency and platform integration. Its 17-watt TDP is dramatically lower than the 65-watt TDP of the Core 7 251E, and it uses a 3 nm process from TSMC, whereas the Core 7 251E uses Intel's 10 nm process. The mobile chip also integrates Arc 130V graphics, which is a more capable integrated GPU than the UHD Graphics 770 found on the desktop part. The Core Ultra 5 236V holds a 75th percentile ranking against all CPUs in the database, while the Core 7 251E sits at the 50th percentile, indicating the mobile chip outperforms a larger share of recorded processors in the aggregate benchmark score.

Architecture Differences

The two chips come from different design philosophies. The Intel Core 7 251E is based on Bartlett Lake, a desktop-oriented codename, and uses Intel's 10 nm process node, with a die size of 257 mm². The Intel Core Ultra 5 236V uses Lunar Lake architecture, built on TSMC's 3 nm process, and belongs to the Core Ultra Series 2 family. The 3 nm node allows the mobile chip to pack more transistors into a smaller area, which explains its lower power draw.

Cache layouts differ substantially. The Core 7 251E uses 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3 cache. The Core Ultra 5 236V uses 192 KB of L1 per core, 2.5 MB of L2 per core, and only 8 MB of shared L3. The desktop chip has over four times the L3 cache, which helps in workloads with large working sets that benefit from caching.

Memory support diverges as well. The Core 7 251E supports both DDR4 and DDR5, while the Core Ultra 5 236V's memory support is listed as motherboard-dependent. The desktop part has a rated memory bandwidth of 89.6 GB/s, while the mobile chip has no recorded bandwidth figure. PCIe lanes also differ: the Core 7 251E provides 16 Gen 5 lanes from the CPU, while the Core Ultra 5 236V provides only 4 Gen 5 lanes. The desktop chip is designed for expansion, with room for discrete GPUs and add-in cards, while the mobile chip is constrained by its BGA form factor.

Head-to-Head Benchmarks

Benchmark results for the Core Ultra 5 236V are recorded across Cinebench and Passmark suites. The Core 7 251E has no recorded benchmark scores in the database, so all scoring comparisons rely on the mobile chip's absolute numbers and its position relative to other CPUs.

In Cinebench R23 multicore, the Core Ultra 5 236V scores 15,628 points, with a single-core score of 2,206. In Cinebench R20, it scores 6,563 multicore and 926 single-core. The older Cinebench R15 test shows 1,575 multicore and 222 single-core. These numbers indicate the Core Ultra 5 236V is a capable performer for its 17-watt power envelope, but the multithreaded scores are limited by its 8 threads.

Passmark results for the Core Ultra 5 236V show strong integer and floating-point throughput for a mobile part. It scores 38,765 in integer math, 52,774 in floating-point math, and 18,375 in multithreaded performance. Single-thread performance is recorded at 3,893 points. Data compression scores 176,554, while data encryption scores 13,049. Extended instruction performance reaches 15,451, and prime number finding scores 171. Physics simulation scores 1,503, and random string sorting scores 21,628.

The nearest rivals to the Core Ultra 5 236V in the database are all within 0.2 percent of its average score of 21,952. The Intel Core Ultra 5 238V scores 21,981, a 0.1 percent difference. The Intel Core i7-11700F scores 21,988, a 0.2 percent difference. The AMD Ryzen 5 3600X scores 21,992, also a 0.2 percent difference. The AMD EPYC 9534 scores 21,900, a 0.2 percent difference in the other direction. This clustering shows the Core Ultra 5 236V lands in a tightly packed performance band where no single rival holds a meaningful edge.

The Core 7 251E has no benchmark entries, so its wins cannot be quantified with recorded scores. Its architectural advantages, specifically 24 cores versus 8 and 5.60 GHz boost versus 4.70 GHz, suggest it would dominate multithreaded tests, but the database contains no direct measurements to confirm this.

Specification Differences

The two processors differ in nearly every core specification. The Core 7 251E has 24 cores and 32 threads, while the Core Ultra 5 236V has 8 cores and 8 threads. Both have a base clock of 2.10 GHz, but the boost clock differs at 5.60 GHz versus 4.70 GHz. TDP is 65 watts for the desktop chip and 17 watts for the mobile chip.

Socket and form factor separate them completely. The Core 7 251E uses Intel Socket 1700 and is a desktop part, while the Core Ultra 5 236V uses Intel BGA 2833 and is a mobile part. The process node is 10 nm for the desktop chip, sourced from Intel's foundry, versus 3 nm for the mobile chip, sourced from TSMC. The die size is 257 mm² for the Core 7 251E, with no die size recorded for the Core Ultra 5 236V.

Cache differences are stark. L1 is 80 KB per core on the Core 7 251E versus 192 KB per core on the Core Ultra 5 236V. L2 is 2 MB per core versus 2.5 MB per core. L3 is 36 MB shared versus 8 MB shared. The desktop chip supports ECC memory, the mobile chip does not. Memory support on the desktop chip includes DDR4 and DDR5, while the mobile chip's support is listed as unknown and motherboard-dependent. Memory bandwidth is 89.6 GB/s on the desktop chip, with no figure recorded for the mobile chip. PCIe lanes are 16 Gen 5 on the desktop part versus 4 Gen 5 on the mobile part. Integrated graphics are UHD Graphics 770 on the desktop chip and Arc 130V on the mobile chip.

Release dates also differ. The Core Ultra 5 236V launched on 2024-09-23, while the Core 7 251E launched on 2025-01-12. The Core 7 251E has a launch MSRP of $384, while the Core Ultra 5 236V has no recorded launch MSRP. Both parts are active in production, and neither has an unlocked multiplier.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251E has 24 cores and 32 threads, while the Intel Core Ultra 5 236V has 8 cores and 8 threads.

Q: What is the power consumption difference?

A: The Core 7 251E has a TDP of 65 watts, while the Core Ultra 5 236V has a TDP of 17 watts.

Q: Which chip has better integrated graphics?

A: The Core Ultra 5 236V uses Arc 130V, while the Core 7 251E uses UHD Graphics 770.

Q: Do both processors support ECC memory?

A: No. The Core 7 251E supports ECC memory, but the Core Ultra 5 236V does not.

Q: How does the Core Ultra 5 236V compare to its nearest rivals?

A: The Core Ultra 5 236V has an average benchmark score of 21,952, which is within 0.2 percent of the Intel Core Ultra 5 238V, Intel Core i7-11700F, AMD Ryzen 5 3600X, and AMD EPYC 9534.

Q: Which processor has a higher boost clock?

A: The Core 7 251E boosts to 5.60 GHz, while the Core Ultra 5 236V boosts to 4.70 GHz.

The Verdict

The data points to a clear use-case split. The Core 7 251E is built for desktop workloads where core count and memory capacity matter more than power draw. Its 24-core, 32-thread configuration, 36 MB of L3 cache, and ECC support make it the logical pick for multithreaded desktop applications that can use many threads. The lack of recorded benchmarks for this chip means its exact performance level is unverified in the database, but the specification sheet indicates a strong parallel processor.

The Core Ultra 5 236V is the choice for mobile systems where efficiency is paramount. Its 17-watt TDP, 3 nm process, and integrated Arc 130V graphics make it suitable for thin laptops. Its benchmark scores place it in the 75th percentile of all CPUs, and its aggregate score of 21,952 puts it in a tight performance cluster with several desktop processors from previous generations. The 8-thread design limits its multithreaded ceiling, but its single-thread score of 3,893 in Passmark shows solid per-core performance.

Users needing ECC memory, massive thread counts, and high boost clocks should favor the Core 7 251E. Users prioritizing low power consumption, a smaller footprint, and newer manufacturing technology should favor the Core Ultra 5 236V. The two chips serve different sockets, different platforms, and different markets, so the choice between them is dictated by the intended system rather than raw performance alone.