Intel Core 3 305 vs Intel Core 7 251E Comparison

Where Each One Wins

The Intel Core 3 305 and the Intel Core 7 251E serve fundamentally different market positions, and the recorded data confirms a clear split. The Core 3 305 is a mobile processor built on a modern 3 nm node with 6 cores and 6 threads. Its benchmark presence is substantial, with 17 recorded scores across Cinebench and Passmark suites. The Core 7 251E, by contrast, is a desktop processor with 24 cores and 32 threads, yet the database shows no recorded benchmark scores for it. This absence of performance data for the Core 7 251E means the wins are entirely one-sided in terms of measurable output, but the architectural advantages of the Core 7 251E are evident from its specifications.

The Core 3 305 wins in every category where a benchmark score exists, simply because the Core 7 251E has no entries in the benchmark database. The Core 3 305 delivers a Cinebench R23 multicore score of 13123, a Passmark multithread score of 15439, and a Passmark single-thread score of 3977. These numbers position the Core 3 305 at the 72nd percentile among all CPUs, with an average benchmark score of 18302. The Core 7 251E sits at the 50th percentile with an average benchmark score of zero, reflecting the lack of recorded testing.

For use-case analysis, the Core 3 305 is the only chip with demonstrated performance. Its mobile segment designation, single-channel memory bus, and 15 W TDP indicate a power-conscious design intended for thin-and-light systems. The Core 7 251E, with its 65 W TDP, desktop socket, dual-channel memory, and PCIe Gen 5 support, is clearly aimed at desktop workloads, but the database contains no measured results to confirm its real-world behavior. Without benchmark data, the Core 7 251E's wins are purely speculative, based on core count and clock specifications rather than recorded scores.

Architecture Differences

The two processors come from entirely different architectural lineages. The Core 3 305 uses the Wildcat Lake codename and belongs to the Core 3 generation, built on a 3 nm process node at Intel's foundry. The Core 7 251E uses the Bartlett Lake codename, belongs to the Core 7 generation, and is fabricated on a 10 nm node with a die size of 257 mm². The process node gap is substantial: 3 nm versus 10 nm, which explains the dramatic difference in power envelopes, 15 W versus 65 W.

Core configuration differs sharply. The Core 3 305 has 6 cores and 6 threads, meaning no hyperthreading. The Core 7 251E has 24 cores and 32 threads, indicating a hybrid arrangement with additional threads beyond the physical core count. Cache hierarchies reflect this disparity. The Core 3 305 has 192 KB of L1 cache, 2.5 MB of L2 cache, and 6 MB of shared L3 cache. The Core 7 251E uses a per-core cache structure: 80 KB of L1 per core and 2 MB of L2 per core, with 36 MB of shared L3. The L3 advantage for the Core 7 251E is sixfold, 36 MB versus 6 MB.

Memory architecture differs as well. The Core 3 305 supports DDR5 and LPDDR5X memory through a single-channel bus, delivering 59.7 GB/s of bandwidth. The Core 7 251E supports DDR4 and DDR5 through a dual-channel bus, delivering 89.6 GB/s. The Core 7 251E also supports ECC memory, while the Core 3 305 does not. PCIe connectivity favors the desktop chip: the Core 7 251E provides Gen 5 with 16 CPU lanes, while the Core 3 305 provides Gen 4 with 6 lanes. Integrated graphics differ too: the Core 3 305 uses Intel Xe3 Graphics with one Xe core, while the Core 7 251E uses UHD Graphics 770.

Head-to-Head Benchmarks

The head-to-head benchmark table is empty. No direct comparison scores exist between the Intel Core 3 305 and the Intel Core 7 251E. The Core 3 305 has its own benchmark results, and the Core 7 251E has none. This makes a traditional head-to-head walkthrough impossible. Instead, the analysis must rely on the Core 3 305's absolute scores and the Core 7 251E's specifications.

The Core 3 305 produces a Cinebench R15 multicore score of 1322 and a single-core score of 186. In Cinebench R20, it scores 5511 multicore and 777 single-core. Cinebench R23 results show 13123 multicore and 1852 single-core. Passmark results include a multithread score of 15439, a single-thread score of 3977, integer math at 32295, floating-point math at 42284, data compression at 146857, data encryption at 11019, extended instructions at 13543, find prime numbers at 115, physics at 1233, and random string sorting at 17623.

Relative to its nearest rivals in the database, the Core 3 305 sits within a tight cluster. It trails the Intel Core i3-14100 by 0.1% in average score, trails the Intel Core 5 330 by 0.2%, and trails the Intel Core 7 360 by 0.4%. It leads the AMD Ryzen 5 2600E by 0.4%. These deltas are marginal, indicating that the Core 3 305's average benchmark score of 18302 places it in a competitive band where no single processor holds a decisive edge. The Core 7 251E has no rival entries, so no comparative deltas exist for it.

The largest measurable wins belong to the Core 3 305 by default. Its Cinebench R23 multicore score of 13123 and Passmark multithread score of 15439 show a processor capable of sustained multi-threaded work despite its 15 W envelope. The single-thread score of 3977 in Passmark confirms solid single-core performance for a mobile part. None of these numbers can be compared to the Core 7 251E, as the database lacks any recorded results for that chip.

Specification Differences

The specification table shows clear divergence across nearly every field. Core count: 6 for the Core 3 305 versus 24 for the Core 7 251E. Thread count: 6 versus 32. Base clock: 1.50 GHz versus 2.10 GHz. Boost clock: 4.30 GHz versus 5.60 GHz. TDP: 15 W versus 65 W. Socket: Intel BGA 1516 versus Intel Socket 1700. Process node: 3 nm versus 10 nm. Die size: not recorded for the Core 3 305, 257 mm² for the Core 7 251E. L3 cache: 6 MB shared versus 36 MB shared. Memory support: DDR5 and LPDDR5X versus DDR4 and DDR5. Memory bus: single-channel versus dual-channel. Memory bandwidth: 59.7 GB/s versus 89.6 GB/s. ECC support: false versus true. PCIe: Gen 4 with 6 lanes versus Gen 5 with 16 lanes. Integrated graphics: Intel Xe3 Graphics (1 Xe) versus UHD Graphics 770. Market segment: Mobile versus Desktop. Release date: 2026-04-15 versus 2025-01-12. Launch MSRP: the Core 3 305 is listed at $309, the Core 7 251E at $384.

The Core 3 305 has a part number of SAE3L, while the Core 7 251E has a part number of SRQDUQ657. Both processors are active in production, and neither has an unlocked multiplier. The Core 3 305 supports only single-channel memory, a notable limitation for memory-intensive workloads. The Core 7 251E's dual-channel bus and higher bandwidth provide a structural advantage for desktop applications, though no benchmark confirms this in practice.

FAQ

Q: Which processor has more cores?

A: The Intel Core 7 251E has 24 cores and 32 threads, while the Intel Core 3 305 has 6 cores and 6 threads.

Q: What is the process node difference?

A: The Core 3 305 is built on a 3 nm node, while the Core 7 251E uses a 10 nm node with a die size of 257 mm².

Q: Does the Core 3 305 support ECC memory?

A: No. ECC memory support is listed as false for the Core 3 305. The Core 7 251E does support ECC memory.

Q: What benchmark scores exist for the Core 7 251E?

A: The database contains no benchmark scores for the Core 7 251E. Its average benchmark score is listed as zero, and its percentile is 50.

Q: How does the Core 3 305 compare to its nearest rivals?

A: The Core 3 305 trails the Intel Core i3-14100 by 0.1%, the Intel Core 5 330 by 0.2%, and the Intel Core 7 360 by 0.4% in average score, while leading the AMD Ryzen 5 2600E by 0.4%.

Q: What are the memory bandwidth figures?

A: The Core 3 305 delivers 59.7 GB/s over a single-channel bus, while the Core 7 251E delivers 89.6 GB/s over a dual-channel bus.

The Verdict

The data presents an unusual case: one processor fully measured, the other entirely unmeasured. The Intel Core 3 305 has a complete benchmark profile and sits at the 72nd percentile among all CPUs, with an average score of 18302. It is a mobile chip with a 15 W TDP, a 3 nm node, and six cores, delivering competitive scores that place it within 0.4% of several similarly positioned processors. Its single-channel memory and 6 MB of L3 cache limit its ceiling for heavy multi-threaded desktop work, but for its segment, the recorded results are solid.

The Intel Core 7 251E has no benchmark scores, no nearest rivals, and an average score of zero. Its specifications suggest a far more powerful part on paper: 24 cores, 32 threads, a 5.60 GHz boost clock, 36 MB of L3, dual-channel memory, and PCIe Gen 5. The 65 W TDP and desktop socket confirm a different intended use case. But the database records no measurements to validate any of these claims. The verdict from the data is therefore straightforward: the Core 3 305 is the only processor with verified performance, and the Core 7 251E remains unquantified. Users seeking measured results should look at the Core 3 305. Users considering the Core 7 251E must rely on its specifications alone, as no benchmark evidence exists to support a performance assessment.