Intel Core i5-8250U vs Intel Core i7-10510U Comparison

The Intel Core i7-10510U and Intel Core i5-8250U are two mobile processors that, on the surface, appear to be close competitors. The aggregate data shows an average benchmark score of 8580 for the i7-10510U against 8577 for the i5-8250U, a difference of only 0.1%. Yet, a deep dive into the individual benchmark results reveals a consistent, albeit narrow, pattern of superiority for the newer chip. The i7-10510U wins all 17 head-to-head comparisons, with no wins for the i5-8250U, but the margins are often modest, suggesting the older chip is still a capable performer. This analysis will dissect the benchmark data, architectural differences, and specification changes to determine which processor holds the edge for specific workloads.

Head-to-Head Benchmarks

The most striking finding is the uniformity of victory for the Intel Core i7-10510U. Across all 17 recorded benchmark comparisons, it emerges as the winner. The largest single margin is in the PassMark "find prime numbers" test, where the i7-10510U scores 22 against the i5-8250U's 18, a delta of 22.2%. This suggests a significant advantage in pure integer calculation loops, which can be critical for scientific and cryptographic workloads.

The single-threaded performance gap is also pronounced. In the PassMark single-thread test, the i7-10510U scores 2237, which is 18.6% higher than the i5-8250U's 1886. This is a substantial lead and indicates that the newer architecture handles per-core tasks with much greater efficiency. This advantage is confirmed by the Cinebench R23 single-core score, where the i7-10510U's 760 beats the i5-8250U's 694 by 9.5%. For everyday responsiveness, legacy application compatibility, and lightly-threaded tasks like web browsing or office work, this single-core lead is the most important metric.

The multi-core results tell a similar story, though with slightly smaller margins. The Cinebench R23 multi-core benchmark shows the i7-10510U scoring 5388 versus the i5-8250U's 4918, a 9.6% delta. This is echoed in the older Cinebench R20 multi-core test, where the i7-10510U scores 2262 and the i5-8250U scores 2065, a 9.5% difference. The PassMark multithread score is 6450 for the i7-10510U and 5812 for the i5-8250U, an 11% delta. These figures indicate that the i7-10510U is not just faster on a per-core basis, but also scales its performance more effectively across all four cores and eight threads.

The performance delta in more specialized tasks is also consistent. In floating-point math, the i7-10510U leads with a score of 14080 against 12706, a 10.8% advantage. Integer math shows a 12.2% lead (23441 vs 20885). Data compression and encryption tasks also favor the i7-10510U, with 8% and 8.7% leads respectively (82606 vs 76521 and 2151 vs 1979). Even the physics simulation score shows a 16.5% gap in favor of the i7-10510U (472 vs 405). The data presents a clear picture: the i7-10510U is faster in every measured category, with the most significant wins in single-threaded and prime-number-finding workloads.

FAQ

Q: Is the Intel Core i7-10510U faster than the Intel Core i5-8250U in all benchmarks?

A: Yes. The data shows the i7-10510U wins all 17 head-to-head benchmark comparisons, with no wins for the i5-8250U. The margins range from 6.2% in extended instructions to 22.2% in find prime numbers.

Q: Which processor has a higher single-core performance?

A: The i7-10510U has significantly higher single-core performance. Its PassMark single-thread score is 2237, which is 18.6% higher than the i5-8250U's 1886. The Cinebench R23 single-core score also shows a 9.5% lead for the i7-10510U (760 vs 694).

Q: How do the two chips compare in multi-threaded workloads?

A: The i7-10510U also leads in multi-threaded tasks. The Cinebench R23 multi-core score is 5388 for the i7-10510U versus 4918 for the i5-8250U, a 9.6% difference. The PassMark multithread score is 6450 vs 5812, an 11% lead.

Q: What is the difference in the average benchmark score between the two?

A: The average benchmark score for the i7-10510U is 8580, while the i5-8250U scores 8577. This is a negligible difference of only 0.1%, despite the i7-10510U winning every individual test.

Q: Which CPU has the better architecture for performance?

A: The i7-10510U uses the newer Comet Lake architecture, while the i5-8250U uses Kaby Lake. This architectural update is the likely reason for its consistent performance advantage, particularly in single-threaded and integer-heavy tasks.

Q: Are there any benchmarks where the i5-8250U comes close to the i7-10510U?

A: The closest result is in the PassMark extended instructions test, where the i7-10510U leads by only 6.2% (5224 vs 4920). The data compression test also shows a relatively small 8% gap (82606 vs 76521).

Architecture Differences

The two processors come from different architectural generations, which explains much of the performance disparity. The Intel Core i7-10510U is based on the Comet Lake architecture, specifically the Comet Lake-U codename. In contrast, the Intel Core i5-8250U is built on the older Kaby Lake architecture, with the codename Kaby Lake-R. Both are manufactured on the same 14 nm process node at Intel's foundry, but the microarchitectural improvements in Comet Lake are evident in the benchmark results.

The cache hierarchy is a key differentiator. The i7-10510U features 8 MB of shared L3 cache, while the i5-8250U has 6 MB of shared L3 cache. This 2 MB difference in the last-level cache can have a substantial impact on performance in applications that repeatedly access a large working set of data, as it allows more data to be stored closer to the cores. The L1 and L2 caches are identical in size, with 64 KB per core for L1 and 256 KB per core for L2.

Another difference lies in the integrated graphics. The i7-10510U is listed with "UHD Graphics," while the i5-8250U is specified with "UHD 620." While the exact capabilities are not detailed in the data, the naming suggests a generational improvement in the graphics unit for the Comet Lake part. The i5-8250U also has a listed die size of 123 mm², whereas the die size for the i7-10510U is not provided, making a direct comparison on that front impossible.

Specification Differences

The specification sheets reveal several clear differences beyond the architectural generation. The most obvious is the clock speed. The i7-10510U has a base clock of 1800.00 MHz and a boost clock of 4.90 GHz. The i5-8250U starts lower at 1600.00 MHz and boosts up to 3.40 GHz. This 1.5 GHz difference in maximum boost clock is the primary driver behind the i7-10510U's superior single-threaded performance.

The thermal design power (TDP) also differs, with the i7-10510U rated at 25 watts and the i5-8250U at 15 watts. This higher TDP for the i7-10510U allows it to sustain higher clock speeds under load, but it also implies a higher power draw and potentially more heat generation, which is a consideration for thin-and-light laptop designs.

The socket types are different as well. The i7-10510U uses Intel BGA 1440, while the i5-8250U uses Intel BGA 1356. These sockets are not interchangeable, meaning the processors are not drop-in compatible with the same motherboards. Memory support also varies, with the i7-10510U supporting both DDR3 and DDR4, while the i5-8250U is limited to DDR4. Finally, the production status differs: the i7-10510U is marked as "End-of-life," while the i5-8250U is marked as "Active." The release date for the i7-10510U is 2019-08-20, and for the i5-8250U it is 2017-08-20.

The Verdict

The data points to a single, definitive conclusion: the Intel Core i7-10510U is the superior processor in every benchmark test recorded. With a 100% win rate in head-to-head comparisons and significant leads in single-core, multi-core, and specialized task benchmarks, it is the faster chip in all measurable aspects. The i7-10510U's higher boost clock, larger L3 cache, and newer Comet Lake architecture combine to deliver a consistent performance advantage that ranges from roughly 6% to 22% depending on the workload.

However, the aggregate average benchmark score tells a different story. The i7-10510U's average score of 8580 is only 0.1% higher than the i5-8250U's 8577. This is an interesting paradox. It suggests that while the i7-10510U wins every individual test, the magnitude of these wins is not enough to significantly shift its overall standing in the global CPU performance percentile. Both processors sit in the 64th and 65th percentile of all CPUs, respectively. This means that for a user looking at overall system performance, the two chips are effectively in the same class, despite the i7-10510U's clear per-test victories.

The verdict is nuanced. If raw performance in specific tasks is the absolute priority, the i7-10510U is the clear choice. Its wins in single-threaded and integer-heavy benchmarks are substantial. Yet, the near-identical average score and the i5-8250U's "Active" production status (versus the i7-10510U's "End-of-life") suggest that the older chip remains a relevant and viable option, especially in systems where the lower 15W TDP is a critical factor for battery life and thermal management.

Where Each One Wins

Intel Core i7-10510U: This processor wins in every performance category measured. Its largest advantages are in single-threaded tasks, with an 18.6% lead in PassMark single-thread and a 10.1% lead in Cinebench R15 single-core. It is also significantly better at finding prime numbers (22.2% lead) and physics simulations (16.5% lead). For users who prioritize maximum responsiveness in applications that rely heavily on a single core, or who run scientific or mathematical software, the i7-10510U is the definitive winner. Its higher TDP of 25W also suggests it can maintain its performance under sustained loads better than the 15W i5-8250U.

Intel Core i5-8250U: The i5-8250U does not win any benchmark comparisons, but its strengths lie in its efficiency and availability. With a lower TDP of 15 watts, it is better suited for fanless or ultra-portable designs where power consumption and heat dissipation are more critical than peak performance. Its "Active" production status means it is still a current product, whereas the i7-10510U is end-of-life. The benchmark data shows the i5-8250U is closest to the i7-10510U in extended instructions (6.2% gap), suggesting its performance is relatively competitive in that specific niche. For a user on a system designed around the BGA 1356 socket who prioritizes a balance of capability and power efficiency, the i5-8250U remains a practical choice, even if it is not the fastest option in this comparison.