Intel Core 7 251E vs Intel Core Ultra 7 265HX Comparison

Head-to-Head Benchmarks

The Core Ultra 7 265HX is the only processor in this comparison with recorded benchmark data, and that data is extensive. The database contains 17 benchmark results for the 265HX, spanning Cinebench releases and PassMark workloads. The Core 7 251E has no recorded benchmark scores, leaving the comparison entirely one-sided. Every measurable performance indicator in the database favors the 265HX by default, since no competing numbers exist for the 251E.

The 265HX delivers a Cinebench R23 multi-core score of 40,642 and a single-core score of 5,737. In Cinebench R20, it records 17,069 multi-core and 2,409 single-core. The older Cinebench R15 test shows 4,096 multi-core and 578 single-core. These results place the 265HX at the 93rd percentile among all CPUs in the database, with an average benchmark score of 63,173.

The PassMark suite reinforces this position. The 265HX scores 126,954 in integer math, 161,605 in floating-point math, and 40,741 in extended instructions. Data compression reaches 511,817, while data encryption hits 39,472. Prime number finding scores 406, random string sorting scores 62,458, and the physics test records 2,978. The multithread score is 47,985, and single-thread performance sits at 4,500.

Because the 251E lacks any benchmark entries, the head-to-head comparison cannot show relative wins or losses. The winsA and winsB fields in the database are both zero, confirming that no direct benchmark confrontations have been recorded. The 265HX stands as the only measured participant, and its scores establish a baseline that the 251E cannot contest with available data.

The 265HX's nearest rivals in the database provide context for its standing. The Intel Core i7-13790F scores 63,080, a delta of 0.1 percent relative to the 265HX. The AMD Ryzen AI 7 450G scores 63,331, placing it 0.2 percent ahead. The AMD Ryzen AI Embedded P185 scores 62,839, which is 0.5 percent behind. The Intel Core Ultra 7 255HX scores 62,738, trailing by 0.7 percent. These narrow margins show the 265HX clustering tightly with comparable processors, neither dominating nor being dominated within its immediate competitive set.

The Verdict

The data presents a straightforward conclusion: the Core Ultra 7 265HX is the only option with measurable performance, and that performance is strong. Its 93rd percentile ranking among all CPUs in the database indicates top-tier placement. The absence of any benchmark scores for the Core 7 251E means the database cannot substantiate any performance claim for that processor.

Buyers seeking a mobile processor with verified multi-threaded and single-threaded capabilities should look to the 265HX. Its Cinebench R23 multi-core score of 40,642 and single-core score of 5,737 are the only recorded figures available for comparison. The 251E, lacking any recorded scores, cannot be recommended on performance grounds from this data.

The 265HX also holds advantages in platform features. It uses a 3 nm process node from TSMC, while the 251E uses a 10 nm node from Intel. The 265HX has an unlocked multiplier, enabling overclocking, whereas the 251E does not. These specification differences reinforce the 265HX as the more capable and flexible option.

For anyone choosing between these two processors, the database only supports one choice. The 265HX has the scores, the percentile ranking, and the platform flexibility. The 251E has none of the recorded data needed to justify selection.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Core Ultra 7 265HX has an average benchmark score of 63,173. The Intel Core 7 251E has an average benchmark score of 0, as no benchmarks are recorded for it.

Q: What is the Cinebench R23 multi-core score for the 265HX?

A: The 265HX scores 40,642 in Cinebench R23 multi-core and 5,737 in single-core.

Q: How does the 265HX compare to its nearest rivals?

A: The 265HX is 0.1 percent ahead of the Intel Core i7-13790F, 0.2 percent behind the AMD Ryzen AI 7 450G, 0.5 percent ahead of the AMD Ryzen AI Embedded P185, and 0.7 percent ahead of the Intel Core Ultra 7 255HX.

Q: Which processor has more cores and threads?

A: The Intel Core 7 251E has 24 cores and 32 threads. The Intel Core Ultra 7 265HX has 20 cores and 20 threads.

Q: What process node does each processor use?

A: The 251E uses a 10 nm process node fabricated by Intel. The 265HX uses a 3 nm process node fabricated by TSMC.

Q: Which processor supports ECC memory?

A: The Intel Core 7 251E supports ECC memory. The Intel Core Ultra 7 265HX does not support ECC memory.

Specification Differences

The two processors differ across nearly every specification field in the database. The 251E is a desktop processor with 24 cores and 32 threads, while the 265HX is a mobile processor with 20 cores and 20 threads. The 251E has a base clock of 2.10 GHz and a boost clock of 5.60 GHz. The 265HX has a base clock of 2.60 GHz and a boost clock of 5.30 GHz.

Thermal design power differs as well. The 251E has a TDP of 65 watts, while the 265HX has a TDP of 55 watts. The sockets are incompatible: the 251E uses Intel Socket 1700, and the 265HX uses Intel BGA 2114.

Memory support separates the two clearly. The 251E supports both DDR4 and DDR5 memory with dual-channel configuration and 89.6 GB/s bandwidth. The 265HX supports only DDR5, also dual-channel, with 102.4 GB/s bandwidth. ECC memory is supported on the 251E but not on the 265HX.

PCIe lane counts differ. The 251E provides Gen 5 with 16 lanes from the CPU. The 265HX provides Gen 5 with 20 lanes from the CPU. Integrated graphics also differ: the 251E uses UHD Graphics 770, while the 265HX uses Arc Xe-LPG Graphics 64EU.

The 251E has a locked multiplier, while the 265HX has an unlocked multiplier. The 251E has a launch MSRP of $384. The 265HX has no recorded launch MSRP. The 251E has a die size of 257 mm², while the 265HX has a die size of 243 mm². The 265HX has 17,800 million transistors, while the 251E has no recorded transistor count.

Architecture Differences

The architecture gap between these processors is substantial. The 251E uses the Bartlett Lake codename with a 10 nm process node fabricated by Intel. The 265HX uses the Arrow Lake-HX codename with a 3 nm process node fabricated by TSMC. The process node difference is significant: 10 nm versus 3 nm represents a major generational leap in manufacturing technology.

Cache hierarchies differ in both size and organization. The 251E has 80 KB of L1 cache per core, 2 MB of L2 cache per core, and 36 MB of shared L3 cache. The 265HX has 192 KB of L1 cache per core, 3 MB of L2 cache per core, and 30 MB of shared L3 cache. The 265HX offers more L1 and L2 per core, while the 251E offers more total L3.

The 251E belongs to the Core 7 generation under the Bartlett Lake label. The 265HX belongs to the Core Ultra Series 2 under the Arrow Lake-HX label. The 265HX carries the Arrow Lake architecture designation, while the 251E has no specific architecture field recorded.

Transistor counts differ dramatically where data exists. The 265HX contains 17,800 million transistors on a 243 mm² die. The 251E has no recorded transistor count, only a die size of 257 mm². The foundry relationship also differs: Intel fabricates the 251E, while TSMC fabricates the 265HX.

Integrated graphics architectures reflect the generational split. The 251E uses UHD Graphics 770, an older Intel graphics solution. The 265HX uses Arc Xe-LPG Graphics 64EU, a newer architecture with different capabilities. The part numbers also differ: SRQDUQ657 for the 251E and SRVFH for the 265HX.

Where Each One Wins

The recorded data supports only one winner across all measured categories: the Intel Core Ultra 7 265HX. Every benchmark score in the database belongs to this processor, giving it wins in multi-threaded workloads, single-threaded workloads, and every PassMark subtest. The 265HX's 93rd percentile ranking among all CPUs confirms its broad strength.

For multi-threaded tasks, the 265HX delivers Cinebench R23 multi-core at 40,642. PassMark multithread reaches 47,985. These scores indicate strong performance in rendering, compilation, and other parallel workloads. The nearest rival comparison shows the 265HX within 0.7 percent of the Intel Core Ultra 7 255HX, confirming consistency within the same family.

For single-threaded tasks, the 265HX records Cinebench R23 single-core at 5,737 and PassMark single-thread at 4,500. These figures position it well for responsiveness in everyday applications and lightly threaded software.

The 251E cannot claim any benchmark wins because no benchmark data exists for it. The database records zero wins for the 251E and zero wins for the 265HX in direct head-to-head comparisons, but the 265HX's standalone scores provide the only measurable evidence of performance.

Use-case selection from this data is therefore limited. The 265HX suits workloads requiring verified multi-core performance, such as content creation, software development, and scientific computing. Its 20 lanes of Gen 5 PCIe support discrete GPUs and fast storage. Its unlocked multiplier allows performance tuning. The 251E, with no recorded scores, offers only its specification sheet: more cores, more threads, higher boost clock, larger L3 cache, and ECC support. Those specifications may appeal to desktop users needing ECC memory and DDR4 compatibility, but the database cannot confirm any performance advantage.