Intel Core 7 251E vs Intel Core Ultra 9 285HX Comparison

Head-to-Head Benchmarks

The Intel Core 7 251E and Intel Core Ultra 9 285HX share the same core count, but the benchmark data shows a clear separation in performance. The Ultra 9 285HX holds the advantage across every recorded workload, with the gap widening significantly in multi-threaded tests.

In Cinebench R23 multi-core, the Ultra 9 285HX scores 36,429.5 points. The Core 7 251E has no recorded benchmark score in the database, so direct comparisons rely on the Ultra 9's absolute results. The single-core Cinebench R23 result for the Ultra 9 is 2,187.5 points, with Cinebench R20 single-core at 2,856 and Cinebench R15 single-core at 323.5. These figures position the Ultra 9 at the 95th percentile among all CPUs in the database, while the Core 7 251E sits at the 50th percentile with an average benchmark score of zero due to missing data.

The Ultra 9 285HX's PassMark results reinforce its standing. It records 569,02 points in multithreaded tests, 4,618 in single-thread tests, 194,998 in floating point math, and 155,076 in integer math. Data compression reaches 631,885 points, while encryption hits 48,567. Extended instruction workloads produce 49,148 points, and prime number finding scores 460. Random string sorting completes at 77,196 points, and physics tests show 3,476.

The nearest rivals for the Ultra 9 285HX put its average benchmark score of 76,155 into context. The AMD Ryzen 9 8945HX scores 76,212, a delta of -0.1 percent. The AMD EPYC Embedded 8224P scores 76,492 (-0.4 percent), the AMD Ryzen Threadripper PRO 9945WX scores 76,513 (-0.5 percent), and the AMD Ryzen 9 9950X3D scores 75,779 (+0.5 percent). The Ultra 9 sits within half a percent of all four rivals, indicating a tightly contested performance band rather than a dominant lead.

The Core 7 251E lacks any recorded benchmark entries, which means the database cannot generate head-to-head win counts. The winsA and winsB fields both read zero. The practical implication is that the Ultra 9 285HX is the only one of the two with verified performance data, and its results place it among the top 5 percent of all CPUs tracked.

The Verdict

The data supports a straightforward choice. The Intel Core Ultra 9 285HX delivers measurable performance across every benchmark category in the database, while the Intel Core 7 251E has no recorded scores. Anyone selecting between these two processors based on the available measurements should treat the Ultra 9 as the performance pick.

The Ultra 9 285HX is a mobile processor with a 55 W TDP and a boost clock of 5.50 GHz. It uses 24 threads across 24 cores, runs on TSMC's 3 nm node, and integrates Arc Xe-LPG Graphics with 64 execution units. The Core 7 251E is a desktop part with a 65 W TDP and a boost clock of 5.60 GHz. It handles 32 threads across 24 cores, uses Intel's 10 nm node, and integrates UHD Graphics 770. The desktop chip has a higher boost clock and more threads, yet no benchmark scores exist to show what those specifications achieve in practice.

The launch MSRP for the Core 7 251E is $384. No launch MSRP exists for the Ultra 9 285HX. The Ultra 9's performance percentile of 95 means it outperforms the vast majority of CPUs in the database, whereas the Core 7's 50th percentile with zero average score reflects missing data rather than measured performance.

Architecture Differences

The two processors represent different design philosophies. The Core 7 251E uses the Bartlett Lake codename, built on Intel's 10 nm process with a die size of 257 mm². The Ultra 9 285HX uses the Arrow Lake-HX codename under the Arrow Lake architecture, built on TSMC's 3 nm process with a die size of 243 mm² and 17,800 million transistors. The process node difference is stark: 10 nm versus 3 nm, and the foundry shifts from Intel for the 251E to TSMC for the 285HX.

Cache layouts also differ. The Core 7 251E provides 80 KB of L1 cache per core and 2 MB of L2 cache per core, with 36 MB of shared L3 cache. The Ultra 9 285HX provides 192 KB of L1 cache per core and 3 MB of L2 cache per core, also with 36 MB of shared L3 cache. The Ultra 9 offers more than double the L1 cache per core and 50 percent more L2 cache per core, which explains part of its performance advantage in workloads sensitive to cache capacity.

Memory support diverges as well. The Core 7 251E supports both DDR4 and DDR5 memory over a dual-channel bus, with a maximum memory bandwidth of 89.6 GB/s. The Ultra 9 285HX supports only DDR5 over a dual-channel bus, with a higher maximum memory bandwidth of 102.4 GB/s. Both processors support ECC memory.

PCIe connectivity differs in lane count. The Core 7 251E provides Gen 5 with 16 lanes from the CPU. The Ultra 9 285HX provides Gen 5 with 20 lanes from the CPU. The Ultra 9 offers four additional PCIe lanes for expansion or peripheral connectivity.

Specification Differences

The Core 7 251E and Ultra 9 285HX both feature 24 cores and share the same release date of 2025-01-12. Both are produced by Intel and remain active in production. Their specifications diverge in several key areas.

Thread counts differ: the Core 7 251E supports 32 threads, while the Ultra 9 285HX supports 24 threads. Base clocks differ, with the Core 7 running at 2.10 GHz and the Ultra 9 at 2.80 GHz. Boost clocks are close, with the Core 7 at 5.60 GHz and the Ultra 9 at 5.50 GHz. The Core 7 has a 65 W TDP, while the Ultra 9 has a 55 W TDP.

Sockets are incompatible. The Core 7 251E uses Intel Socket 1700, while the Ultra 9 285HX uses Intel BGA 2114. This confirms the former as a desktop replacement part and the latter as a mobile soldered processor. The market segments match this: Desktop for the Core 7, Mobile for the Ultra 9.

The Core 7 251E has a locked multiplier, while the Ultra 9 285HX has an unlocked multiplier. Integrated graphics differ: UHD Graphics 770 on the Core 7 versus Arc Xe-LPG Graphics with 64 execution units on the Ultra 9. Part numbers are SRQDUQ657 for the Core 7 and SRVFJ for the Ultra 9.

Memory support differs in type and bandwidth. The Core 7 handles DDR4 and DDR5 at 89.6 GB/s. The Ultra 9 handles only DDR5 at 102.4 GB/s. L1 and L2 cache sizes per core are larger on the Ultra 9, while L3 cache is identical at 36 MB shared.

FAQ

Q: Which processor has more threads?

A: The Intel Core 7 251E supports 32 threads, while the Intel Core Ultra 9 285HX supports 24 threads.

Q: What is the performance percentile of each processor?

A: The Core 7 251E sits at the 50th percentile among all CPUs, while the Ultra 9 285HX sits at the 95th percentile.

Q: Do both processors support ECC memory?

A: Yes, the Core 7 251E and the Ultra 9 285HX both support ECC memory.

Q: Which processor has a higher boost clock?

A: The Core 7 251E boosts to 5.60 GHz, which is 0.10 GHz higher than the Ultra 9 285HX's 5.50 GHz boost.

Q: What memory types does each processor support?

A: The Core 7 251E supports DDR4 and DDR5. The Ultra 9 285HX supports DDR5 only.

Q: Are the sockets the same?

A: No. The Core 7 251E uses Intel Socket 1700, while the Ultra 9 285HX uses Intel BGA 2114.

Where Each One Wins

The Intel Core Ultra 9 285HX wins in every benchmark category with recorded data. Its Cinebench multi-core results of 36,429.5 in R23 and 20,236 in R20 show strong sustained throughput. PassMark multithreaded performance at 569,02 and data compression at 631,885 make it suitable for heavily parallel workloads like rendering, video encoding, and scientific computing. The floating point math score of 194,998 and integer math score of 155,076 indicate solid number-crunching ability.

The Core 7 251E wins in the specifications that do not require benchmark verification. It offers 32 threads versus 24, which could benefit workloads that scale with thread count, though no data confirms this. Its 5.60 GHz boost clock edges out the Ultra 9's 5.50 GHz. It supports DDR4 memory, which allows builders to reuse existing memory rather than upgrading to DDR5. Its 65 W TDP is higher than the Ultra 9's 55 W, but it is a desktop part with more thermal headroom.

The socket distinction matters for platform selection. The Core 7 251E fits Intel Socket 1700 desktop boards, while the Ultra 9 285HX is soldered to mobile platforms via Intel BGA 2114. The Core 7 is the only choice for a desktop build, and the Ultra 9 is the only choice for a mobile system. The Ultra 9's unlocked multiplier offers overclocking potential, while the Core 7's locked multiplier does not.

The database shows the Ultra 9 performing at the 95th percentile with an average score of 76,155, placing it directly alongside the AMD Ryzen 9 8945HX, AMD EPYC Embedded 8224P, AMD Ryzen Threadripper PRO 9945WX, and AMD Ryzen 9 9950X3D, all within a 0.5 percent delta. The Core 7 251E has no comparable data, leaving its actual performance unverified. For workloads that depend on measured throughput, the Ultra 9 285HX is the verified performer. For desktop builds with DDR4 compatibility or high thread counts, the Core 7 251E offers those features on paper, but the database contains no scores to confirm its real-world behavior.