Intel Core i5-8265U vs Intel Core i7-1065G7 Comparison

Where Each One Wins

The benchmark data paints an unusually one-sided picture. Across every recorded test, the Intel Core i7-1065G7 takes the win. The Intel Core i5-8265U does not secure a single victory in any of the 17 head-to-head comparisons. This is not a case of one chip dominating in specific workloads while the other counterattacks elsewhere; it is a clean sweep.

The i7-1065G7 wins decisively in every category, from pure computational throughput to memory-sensitive operations. Its largest advantages appear in data encryption, where it scores 4552 against the i5-8265U's 1961, a 56.9% gap. That is a massive margin for any processor comparison, especially between two mobile parts with identical core and thread counts.

The smallest margin is in random string sorting, where the i7-1065G7 scores 10688 versus 10117, a 5.3% advantage. Even here, the newer architecture maintains its lead, though the gap narrows considerably. This suggests that the i7-1065G7's advantages are not uniform; certain workloads benefit more from its architectural improvements than others.

For single-threaded tasks, the i7-1065G7 consistently leads by double digits. Cinebench R15 single-core shows 97 versus 63, a 35.1% difference. PassMark single-thread shows 2295 versus 2030, an 11.5% gap. The single-core differences are substantial across all Cinebench versions, indicating a fundamental per-thread performance advantage rather than a scaling artifact.

Multi-threaded workloads follow the same pattern. Cinebench R23 multi-core shows 6866 versus 4482, a 34.7% gap. PassMark multithread shows 8185 versus 5838, a 28.7% difference. The i7-1065G7 maintains its lead whether the workload scales across all eight threads or relies on just one.

The i5-8265U's only realistic use case, based on this data, would be in systems where its specific platform characteristics are required. The benchmark results offer no performance scenario where the older chip emerges ahead. Its 64th percentile ranking among all CPUs matches the i7-1065G7's 64th percentile, but the average benchmark score tells a different story: 8568 for the i5-8265U versus 8293 for the i7-1065G7. This apparent contradiction stems from the different benchmark sets recorded for each processor, as the i7-1065G7 includes additional 3DMark tests that pull its average down.

FAQ

Q: Does the i5-8265U win any benchmark at all?

A: No. In the 17 head-to-head tests recorded in the database, the i7-1065G7 wins every single one. The i5-8265U records zero wins across all comparisons.

Q: How large is the performance gap in Cinebench R23 multi-core?

A: The i7-1065G7 scores 6866 while the i5-8265U scores 4482, a 34.7% difference. This is the most modern Cinebench version in the database and shows the i7-1065G7's clear multi-threaded advantage.

Q: Which chip has better single-thread performance?

A: The i7-1065G7 leads in every single-thread test. Cinebench R23 single-core shows 969 versus 632, a 34.8% gap. PassMark single-thread shows 2295 versus 2030, an 11.5% advantage.

Q: Is the i5-8265U closer to the i7-1065G7 in any specific workload?

A: The closest margin is in random string sorting, where the i7-1065G7 scores 10688 versus 10117, just 5.3% ahead. Data compression is also relatively close at 88300 versus 76049, a 13.9% gap.

Q: Do both chips have the same core and thread configuration?

A: Yes, both have 4 cores and 8 threads. Both are 15W mobile processors with locked multipliers. The performance differences come from architecture, cache, memory bandwidth, and clock behavior, not core counts.

Q: What is the worst benchmark result for the i5-8265U relative to the i7-1065G7?

A: Data encryption shows the largest deficit. The i5-8265U scores 1961 against the i7-1065G7's 4552, a 56.9% shortfall. This indicates a major difference in cryptographic workload efficiency.

Head-to-Head Benchmarks

The most striking result in the entire comparison is the data encryption test. The i7-1065G7 scores 4552, more than double the i5-8265U's 1961. A 56.9% advantage in encryption suggests architectural improvements that directly accelerate cryptographic instructions. This is not a minor edge; it is transformative for any workload involving encrypted storage, secure communications, or VPN traffic.

Cinebench results are consistent across all three versions. R15 multi-core shows 691 versus 451, R20 multi-core shows 2883 versus 1882, and R23 multi-core shows 6866 versus 4482. Each version shows a 34.7% gap. Single-core Cinebench results follow the same pattern: R15 at 97 versus 63 (35.1% gap), R20 at 406 versus 265 (34.7% gap), and R23 at 969 versus 632 (34.8% gap). The consistency across Cinebench generations indicates a stable architectural advantage rather than workload-specific optimization.

PassMark integer math shows the i7-1065G7 at 28660 versus 21560, a 24.8% lead. Floating-point math shows 16603 versus 12963, a 21.9% advantage. Extended instructions show 5998 versus 4904, an 18.2% gap. These results demonstrate that the i7-1065G7's advantage extends across diverse computational patterns, from integer arithmetic to SIMD-style workloads.

Find prime numbers, a test sensitive to both clock speed and branch prediction, shows 29 versus 18, a 37.9% gap. Physics simulation shows 589 versus 405, a 31.2% difference. The multithread test shows 8185 versus 5838, a 28.7% lead. Even the single-thread test, which should minimize any multi-core scaling differences, shows 2295 versus 2030, an 11.5% advantage.

The data compression test shows a 13.9% gap, with 88300 versus 76049. Random string sorting shows only a 5.3% difference, the smallest in the entire comparison. This suggests that memory access patterns and cache behavior, while improved in the i7-1065G7, do not produce the same magnitude of advantage as computational workloads.

Specification Differences

The two processors differ in several key specifications. The i5-8265U has a base clock of 1600 MHz, while the i7-1065G7 runs at 1300 MHz. Both boost to 3900 MHz, so the peak clock is identical. The i5-8265U's higher base clock gives it a theoretical advantage in sustained workloads that do not trigger boost behavior, though the benchmark data does not reflect this.

Socket compatibility differs: the i5-8265U uses Intel BGA 1528, while the i7-1065G7 uses Intel BGA 1526. These are not interchangeable sockets, meaning motherboard selection is exclusive to one chip or the other.

Memory bandwidth is a significant differentiator. The i5-8265U offers 38.4 GB/s, while the i7-1065G7 delivers 51.2 GB/s. Both support dual-channel DDR4, but the i7-1065G7's higher bandwidth likely contributes to its performance lead in memory-intensive workloads.

The i5-8265U lists PCIe as "Gen 3, 16 Lanes(CPU only)", while the i7-1065G7 simply lists "Gen 3" without specifying lane count. Both support DDR4 memory and neither supports ECC memory.

Integrated graphics differ: the i5-8265U has UHD Graphics 620, while the i7-1065G7 has Iris Plus. The database does not include graphics benchmarks for either chip, so the performance implications of this difference cannot be quantified here.

Production status and release dates differ. The i5-8265U is end-of-life and was released on 2018-09-30. The i7-1065G7 is active and was released on 2019-07-31. The i5-8265U has a launch MSRP of $297; the i7-1065G7 has no recorded launch MSRP.

Architecture Differences

The architectural gap between these two chips is substantial. The i5-8265U uses Whiskey Lake architecture on a 14 nm process node, representing Intel's refined version of the Skylake-derived design. The i7-1065G7 uses Ice Lake architecture on a 10 nm process node, a generational leap in manufacturing technology. The 10 nm process allows for denser transistors and improved power efficiency, though both chips carry a 15W TDP.

Cache configurations differ meaningfully. The i5-8265U has 64 KB of L1 cache per core, 256 KB of L2 per core, and 6 MB of shared L3 cache. The i7-1065G7 has 80 KB of L1 per core, 256 KB of L2 per core, and 8 MB of shared L3 cache. The i7-1065G7's larger L1 and L3 caches provide more on-die storage for frequently accessed data, which helps explain its consistent benchmark advantage.

The i7-1065G7 has a recorded die size of 123 mm², while the i5-8265U has no die size recorded. The i7-1065G7's codename is Ice Lake-U and its generation is listed as "Core i7 (Sunny Cove-U)", indicating the Sunny Cove microarchitecture. The i5-8265U's codename is Whiskey Lake-U with the generation listed as "Core i5 (Whiskey Lake)".

Both chips have locked multipliers, so neither can be overclocked. The i5-8265U's part number is SRFFXSREJQSREJR, while the i7-1065G7's is SRG0N. Neither chip has recorded transistor counts in the database.

The i5-8265U's nearest rivals include the i5-8250U (0.1% behind), i7-10510U (0.1% behind), EPYC 7601 (0.6% behind), and Pentium Gold G7400 (0.6% ahead). The i7-1065G7's nearest rivals include the Xeon D-2799 (0.2% behind), Xeon Platinum 8268 (0.3% behind), Xeon Gold 5320T (0.3% behind), and i5-10210U (0.6% behind). These nearest-rival comparisons show both chips sitting in similar overall performance tiers relative to the broader CPU landscape.

The Verdict

The data is unambiguous: the Intel Core i7-1065G7 outperforms the Intel Core i5-8265U in every recorded benchmark. The 17-0 win tally leaves no room for interpretation. Anyone choosing between these two processors for a new system should select the i7-1065G7 if performance is the primary criterion.

The i5-8265U's only advantages are situational. Its higher base clock of 1600 MHz versus 1300 MHz could theoretically help in workloads that never reach boost frequencies, but the benchmark results show that even in single-threaded tests, the i7-1065G7 wins decisively. The 34.8% single-core gap in Cinebench R23 suggests that the i7-1065G7's architectural efficiency overcomes its lower base clock.

The i7-1065G7 also offers superior memory bandwidth at 51.2 GB/s versus 38.4 GB/s, a larger L3 cache at 8 MB versus 6 MB, and more L1 cache per core at 80 KB versus 64 KB. These specification advantages translate directly into the benchmark results.

The i5-8265U remains a functional processor, and its end-of-life status means it may be available in existing systems or clearance inventory. But for any new build or upgrade, the i7-1065G7 is the clear choice based on the recorded data. Its active production status also means continued availability and support.

The only caveat is platform compatibility. The two chips use different sockets, so a system designed for one cannot simply swap in the other. Anyone with an existing BGA 1528 motherboard must stick with the i5-8265U or replace the entire platform. For new designs, the i7-1065G7's BGA 1526 socket and superior performance make it the logical pick.