Intel Core 7 251E vs Intel Core Ultra 5 225H Comparison

Intel Core 7 251E is a desktop processor built on the older Bartlett Lake architecture with a 10 nm process node, while Intel Core Ultra 5 225H is a mobile chip using Arrow Lake-H on a 3 nm node manufactured by TSMC. The database contains a full benchmark suite for the Ultra 5 225H, but no recorded scores for the Core 7 251E, meaning a direct comparison relies entirely on the architectural and specification differences between the two parts.

Where Each One Wins

The Core 7 251E wins on raw core and thread count. It offers 24 cores and 32 threads, compared to 14 cores and 14 threads on the Ultra 5 225H. That difference alone positions the 251E as the stronger multi-threaded workload processor on paper, with 10 additional cores and 18 additional threads. The 251E also has a higher boost clock at 5.60 GHz versus 4.90 GHz, which suggests an advantage in lightly threaded tasks that depend on a single core reaching maximum frequency.

The Ultra 5 225H wins on efficiency and memory bandwidth. Its thermal design power is 28 watts, substantially lower than the 65 watts of the 251E. The 225H supports LPDDR5X memory alongside DDR5, while the 251E supports DDR4 and DDR5. The recorded memory bandwidth for the 225H is 102.4 GB/s, higher than the 89.6 GB/s listed for the 251E. That faster memory interface helps the mobile chip in memory-sensitive workloads such as data compression and encryption, where the recorded PassMark scores indicate strong performance.

The 225H also wins on integrated graphics. It uses Arc Graphics 130T, a newer architecture than the UHD Graphics 770 found in the 251E. For systems relying on the integrated GPU, the Arc solution should offer better media and compute capabilities, though the database does not include specific graphics benchmark scores for either processor.

The Core 7 251E wins on platform flexibility in one key area: ECC memory support. The 251E supports ECC memory, while the 225H does not. That makes the desktop chip suitable for error-correcting memory configurations, which matters in workstation or server-adjacent builds. The 251E also provides 16 PCIe Gen 5 lanes from the CPU, double the 8 lanes on the 225H, so expansion options for discrete GPUs or storage are more generous on the desktop part.

Architecture Differences

The two processors come from different Intel generations and process technologies. The Core 7 251E uses Bartlett Lake, built on Intel's 10 nm process with a 257 mm² die size. The Ultra 5 225H uses Arrow Lake-H, fabricated by TSMC at 3 nm. The smaller node typically enables better power efficiency and higher transistor density, though the database does not list transistor counts for either chip.

Cache hierarchies differ significantly. The 251E has 80 KB of L1 cache per core, 2 MB of L2 per core, and 36 MB of shared L3 cache. The 225H has 192 KB of L1 per core, 3 MB of L2 per core, but only 18 MB of shared L3. The larger L3 on the 251E gives it a clear advantage in workloads that repeatedly access a large working set, such as database queries or certain rendering tasks. The 225H compensates with larger per-core L1 and L2 caches, which can benefit single-threaded code that fits within those levels.

The memory controllers also differ. The 251E supports DDR4 and DDR5 in dual-channel mode with 89.6 GB/s bandwidth. The 225H supports DDR5 and LPDDR5X in dual-channel mode with 102.4 GB/s bandwidth. The 225H's ability to use LPDDR5X is particularly relevant for thin-and-light laptops, where soldered low-power memory is common. The 251E's DDR4 support allows cheaper memory in desktop builds, but at the cost of lower peak bandwidth compared to the 225H's supported memory types.

Socket and form factor separate the two completely. The 251E uses Intel Socket 1700, a desktop socket that allows user replacement and upgrade. The 225H uses Intel BGA 2049, a ball-grid array socket soldered to the motherboard, typical for mobile platforms. The 251E is marked as a desktop segment processor, while the 225H is a mobile segment processor. Neither has an unlocked multiplier, so overclocking is not an option for either.

Integrated graphics differ as well. The 251E ships with UHD Graphics 770, while the 225H uses Arc Graphics 130T. The Arc branding indicates a newer GPU architecture with dedicated ray tracing and Xe cores, but the database does not provide graphics scores to quantify the difference.

Head-to-Head Benchmarks

The database includes no head-to-head benchmark entries for the Core 7 251E versus the Ultra 5 225H. The 251E has an empty benchmark array, meaning the only available performance data comes from the 225H's recorded results and its nearest rival comparisons.

The Ultra 5 225H achieves a 82nd percentile rank among all CPUs in the database, with an average benchmark score of 31508. Its nearest rival is the Intel Core i5-13500, which scores 31510, a difference of 0 percent. That puts the 225H in the same performance class as a mid-range desktop chip from a previous generation. The AMD Ryzen 9 5980HX scores 31495, also within 0 percent of the 225H. The Intel Core 7 240H scores 31483, putting the 225H ahead by 0.1 percent. The Intel Core Ultra 3 205 scores 31473, also 0.1 percent behind.

Looking at the 225H's own benchmark numbers, the Cinebench R23 multicore score is 14629.5, while the single-core score is 1969. In Cinebench R20, the multicore score is 10041 and single-core is 1417. In Cinebench R15, multicore is 2397.5 and single-core is 288.5. Geekbench shows a multicore score of 11526 and single-core of 2151.

PassMark scores for the 225H show where the architecture excels. Data compression scores 283451, which is the highest of any single PassMark subtest recorded. Floating point math scores 86540, integer math scores 68520, and extended instructions score 21915. Data encryption scores 21428. Random string sorting scores 33654. The multithread score is 28119, and single-thread score is 4258. Physics scores 1877, and finding prime numbers scores 220.

Those numbers indicate the 225H is well balanced for both integer and floating point work, with particularly strong data compression results. The single-thread PassMark score of 4258 is respectable for a mobile chip, though the lower boost clock of 4.90 GHz compared to the 251E's 5.60 GHz suggests the desktop part would likely win in pure single-threaded PassMark tests. However, no such scores exist for the 251E in the database.

Since the 251E has no recorded benchmarks, any performance conclusion about it must be inferred from its specifications. The 24-core, 32-thread configuration with 36 MB of L3 cache and a 5.60 GHz boost clock positions it as a high-core-count desktop processor. The 225H's 14 cores and 18 MB of L3, even with a newer 3 nm process, cannot match the raw thread count of the 251E in heavily parallel workloads. Conversely, the 225H's higher memory bandwidth and larger per-core L1 and L2 caches may give it an edge in latency-sensitive single-threaded tasks, despite the lower boost clock.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251E has 24 cores and 32 threads. The Intel Core Ultra 5 225H has 14 cores and 14 threads. The 251E offers 10 more cores and 18 more threads.

Q: What is the thermal design power difference?

A: The Core 7 251E has a TDP of 65 watts. The Core Ultra 5 225H has a TDP of 28 watts. The mobile chip consumes less than half the power budget of the desktop part.

Q: Does either processor support ECC memory?

A: Yes, the Core 7 251E supports ECC memory. The Core Ultra 5 225H does not support ECC memory.

Q: What memory types does each support?

A: The Core 7 251E supports DDR4 and DDR5. The Core Ultra 5 225H supports DDR5 and LPDDR5X. Both use dual-channel memory buses, with the 225H having a higher recorded bandwidth of 102.4 GB/s versus 89.6 GB/s for the 251E.

Q: What is the process node for each chip?

A: The Core 7 251E uses Intel's 10 nm process. The Core Ultra 5 225H uses a 3 nm process from TSMC. The 225H also has a smaller die size listed at 257 mm² for the 251E, while the 225H has no die size recorded.

Q: Which processor has a higher boost clock?

A: The Core 7 251E has a boost clock of 5.60 GHz. The Core Ultra 5 225H has a boost clock of 4.90 GHz. The desktop chip is 0.70 GHz higher.

Q: How does the Core Ultra 5 225H rank against other CPUs?

A: The 225H sits at the 82nd percentile among all CPUs in the database, with an average benchmark score of 31508. It matches the Intel Core i5-13500 and AMD Ryzen 9 5980HX within 0 percent, and leads the Intel Core 7 240H and Intel Core Ultra 3 205 by 0.1 percent.

The Verdict

The Intel Core 7 251E is the choice for desktop workloads that demand maximum thread count and high boost frequencies. With 24 cores, 32 threads, 5.60 GHz boost, 36 MB of L3 cache, ECC support, and 16 PCIe Gen 5 lanes, it targets multi-threaded rendering, compilation, virtualization, and memory-intensive server-like tasks. The 65-watt TDP and Socket 1700 platform mean it belongs in a tower or workstation chassis with active cooling.

The Intel Core Ultra 5 225H is the choice for mobile systems where power efficiency and memory bandwidth matter more than raw core count. Its 28-watt TDP, 3 nm process from TSMC, 102.4 GB/s memory bandwidth, and LPDDR5X support make it suitable for thin-and-light laptops. The recorded benchmarks show it performs at the level of the Intel Core i5-13500 and AMD Ryzen 9 5980HX, both scoring within 0 percent of the 225H's average benchmark score. The 225H also delivers strong PassMark results in data compression and floating point math, confirming its capability in real-world mobile productivity.

The database does not contain any benchmark scores for the Core 7 251E, so its performance cannot be compared directly to the 225H's recorded numbers. Based on specifications alone, the 251E should dominate in heavily threaded workloads due to its 32 threads and larger L3 cache, while the 225H should win in power-constrained or memory-bandwidth-bound scenarios. Users who prioritize core count and ECC support should select the 251E. Users who prioritize portability, low power consumption, and faster memory access should select the 225H. Both processors share the same release date of January 12, 2025, and both are still in active production. The 251E has a launch MSRP of $384, while the 225H has no listed launch price.