Intel Core i5-8265U vs Intel Core i7-10510U Comparison

The Intel Core i7-10510U and Intel Core i5-8265U are both 14 nm mobile processors with 4 cores and 8 threads, but the data reveals a clear hierarchy between them. The i7-10510U wins every single head-to-head benchmark in the dataset, with margins ranging from a modest 6.5% to a substantial 22.2%. The i5-8265U holds a 64th percentile ranking among all CPUs, while the i7-10510U sits just one percentile higher at 65, yet their average benchmark scores are nearly identical at 8580 and 8568 respectively. This apparent contradiction—similar overall averages but consistent per-test victories—suggests the i7-10510U's advantages are concentrated in workloads where its higher boost clock and larger cache matter most, while the i5-8265U remains competitive in general-purpose tasks. The i7-10510U is not a revolutionary leap, but it is a uniform, repeatable improvement across every measured category.

The Verdict

The data paints an unambiguous picture: the Intel Core i7-10510U is the superior processor in every benchmark recorded. For users who prioritize raw performance, the choice is straightforward—the i7-10510U delivers higher scores across all 17 head-to-head comparisons, with zero wins for the i5-8265U. The i7-10510U leads by 20.2% in Cinebench R15 multi-core (542 vs 451) and by 20.6% in single-core (76 vs 63), indicating that its advantage is not limited to multi-threaded workloads but extends to single-thread responsiveness as well. This pattern repeats across newer Cinebench versions: R20 multi-core shows a 20.2% lead (2262 vs 1882), R20 single-core a 20.4% lead (319 vs 265), R23 multi-core a 20.2% lead (5388 vs 4482), and R23 single-core a 20.3% lead (760 vs 632). The consistency of these margins—all hovering near 20%—suggests a fundamental clock-speed or architectural efficiency advantage rather than workload-specific optimization.

However, the i5-8265U is not without merit. Its average benchmark score of 8568 is only 0.1% behind the i7-10510U's 8580, and it sits at the 64th percentile versus the i7's 65th. This near-parity in overall standing means that for everyday tasks that do not stress the CPU to its limits, the i5-8265U will feel comparable. The i5-8265U also has a lower TDP of 15 watts versus the i7-10510U's 25 watts, which the data suggests could translate to better battery life in thin-and-light laptops, though no direct power consumption benchmarks are provided. The i5-8265U carries a launch MSRP of $297, while the i7-10510U has no listed launch price. For users on a strict hardware budget, the i5-8265U offers 99.9% of the average performance at a known cost, making it a pragmatic choice for general productivity. The i7-10510U is the pick for anyone who needs the extra 20% in rendering, encryption, or physics simulations and does not mind the higher power draw.

FAQ

Q: Which CPU is faster in single-threaded workloads?

A: The Intel Core i7-10510U wins every single-core benchmark. It leads by 20.6% in Cinebench R15 single-core (76 vs 63), by 20.4% in R20 (319 vs 265), by 20.3% in R23 (760 vs 632), and by 10.2% in PassMark single-thread (2237 vs 2030).

Q: How do the average benchmark scores compare?

A: The i7-10510U has an average benchmark score of 8580, while the i5-8265U scores 8568. This is a difference of only 0.1%, placing both processors within the same performance tier despite the i7's consistent per-test wins.

Q: What is the memory bandwidth difference?

A: The i5-8265U supports DDR4 memory with dual-channel configuration and a memory bandwidth of 38.4 GB/s. The i7-10510U supports both DDR3 and DDR4, but its memory bus and bandwidth specifications are not listed in the data, so no direct comparison is possible.

Q: Are these processors still in production?

A: No. Both the Intel Core i7-10510U and the Intel Core i5-8265U are marked as end-of-life production status. The i7-10510U was released on 2019-08-20, and the i5-8265U was released earlier on 2018-09-30.

Q: Which CPU has a higher boost clock?

A: The i7-10510U has a boost clock of 4.90 GHz, compared to the i5-8265U's 3.90 GHz. This 1.0 GHz difference likely explains the consistent ~20% lead in Cinebench scores.

Q: How does the i7-10510U compare to other CPUs in its class?

A: Its nearest rival is the Intel Core i5-8250U, with a delta of 0% (average scores 8580 vs 8577). The i5-8265U is 0.1% behind, while the AMD EPYC 7601 is 0.5% ahead and the Intel Pentium Gold G7400 is 0.8% behind.

Architecture Differences

The two processors represent different generations of Intel's mobile architecture, though both are built on the same 14 nm process node at Intel's foundry. The i7-10510U uses the Comet Lake architecture, specifically the Comet Lake-U codename, while the i5-8265U is based on Whiskey Lake, with the Whiskey Lake-U codename. This architectural shift from Whiskey Lake to Comet Lake brings several key differences. The i7-10510U has a larger L3 cache of 8 MB shared, compared to the i5-8265U's 6 MB shared. Both have identical L1 and L2 caches at 64 KB per core and 256 KB per core respectively. The i7-10510U also supports both DDR3 and DDR4 memory, whereas the i5-8265U is limited to DDR4 only.

The integrated graphics differ as well: the i7-10510U lists "UHD Graphics" while the i5-8265U specifies "UHD Graphics 620." While the exact performance of these iGPUs is not benchmarked in the data, the generational change suggests the i7-10510U may have access to updated graphics drivers or minor improvements. The socket also differs—the i7-10510U uses Intel BGA 1440, while the i5-8265U uses Intel BGA 1528. This means they are not physically interchangeable, even though both are mobile processors. The i5-8265U explicitly lists PCIe support as Gen 3 with 16 lanes (CPU only), while the i7-10510U's PCIe configuration is not provided, making a direct comparison impossible. Both processors lack ECC memory support and both have locked multipliers, indicating they are not intended for overclocking.

Specification Differences

The specification table shows several clear differences between the two CPUs. The i7-10510U has a base clock of 1800 MHz and a boost clock of 4.90 GHz, while the i5-8265U runs at 1600 MHz base and 3.90 GHz boost. This represents a 200 MHz base clock advantage and a full 1.0 GHz boost clock advantage for the i7-10510U. The thermal design power (TDP) also differs significantly: the i7-10510U is rated at 25 watts, while the i5-8265U is rated at 15 watts. This higher TDP likely enables the i7-10510U to sustain its higher clocks under load, but it also implies greater heat generation and potentially shorter battery life in portable devices.

The L3 cache is 8 MB on the i7-10510U versus 6 MB on the i5-8265U, a 33% increase. Memory support differs as noted: the i7-10510U accepts DDR3 and DDR4, while the i5-8265U only accepts DDR4. The i5-8265U provides explicit memory bus (dual-channel) and bandwidth (38.4 GB/s) specifications, but these fields are null for the i7-10510U. The sockets are different (BGA 1440 vs BGA 1528), and the release dates are roughly 11 months apart—the i7-10510U launched on 2019-08-20, the i5-8265U on 2018-09-30. The i5-8265U has a launch MSRP of $297, which can be stated once as its launch price. The i7-10510U has no listed launch MSRP. The i5-8265U also lists a part number (SRFFXSREJQSREJR), while the i7-10510U does not.

Head-to-Head Benchmarks

The i7-10510U wins all 17 head-to-head benchmarks, but the margins vary by workload type. The largest wins come in the Cinebench suite, where the i7-10510U consistently leads by approximately 20%. Specifically, Cinebench R15 multicore shows a 20.2% lead (542 vs 451), R15 single-core a 20.6% lead (76 vs 63), R20 multicore a 20.2% lead (2262 vs 1882), R20 single-core a 20.4% lead (319 vs 265), R23 multicore a 20.2% lead (5388 vs 4482), and R23 single-core a 20.3% lead (760 vs 632). This uniformity suggests that the i7-10510U's higher boost clock of 4.90 GHz versus 3.90 GHz translates directly into rendering and 3D modeling performance.

The largest single margin is in PassMark find prime numbers, where the i7-10510U leads by 22.2% (22 vs 18). This is a computational workload that heavily depends on integer arithmetic and clock speed, reinforcing the boost clock advantage. Physics simulations show a 16.5% lead (472 vs 405), while PassMark multithread shows a 10.5% lead (6450 vs 5838). Smaller but still consistent wins appear in data encryption (9.7% lead, 2151 vs 1961), random string sorting (9.4% lead, 11068 vs 10117), integer math (8.7% lead, 23441 vs 21560), floating point math (8.6% lead, 14080 vs 12963), and data compression (8.6% lead, 82606 vs 76049). Extended instructions show the narrowest margin at 6.5% (5224 vs 4904), and single-thread performance rounds out at 10.2% (2237 vs 2030). The pattern is clear: the i7-10510U's advantage is most pronounced in pure computational and rendering tasks, while it narrows in memory-bound and instruction-heavy workloads where the i5-8265U's lower TDP and dual-channel memory configuration help it stay competitive.

Where Each One Wins

Based on the benchmark data, the i7-10510U is the clear winner across every measured category, but the degree of its dominance varies. Its strongest performance relative to the i5-8265U is in Cinebench rendering (all versions showing ~20% leads) and prime number calculation (22.2% lead). These are CPU-intensive, clock-sensitive workloads that benefit directly from the i7-10510U's 4.90 GHz boost clock and 8 MB L3 cache. The i7-10510U is therefore the better choice for users who regularly render 3D scenes, compile code, or run scientific simulations. Its 25-watt TDP suggests it can sustain these high clocks for longer periods without throttling, though this comes at the cost of increased power draw.

The i5-8265U, despite losing every benchmark, still has its own profile of strengths. Its 15-watt TDP is 40% lower than the i7-10510U's, which the data implies would result in cooler operation and longer battery life in laptops—though no direct battery benchmarks are provided. Its average benchmark score of 8568 is only 12 points behind the i7-10510U's 8580, meaning that in aggregate, the i5-8265U delivers 99.9% of the overall performance. For everyday tasks like web browsing, document editing, and video playback that do not maximize CPU utilization, the two processors would feel nearly identical. The i5-8265U also has a known launch MSRP of $297, making it a predictable option for system builders. The i5-8265U's wins, then, are not in raw performance but in efficiency and cost predictability—areas not captured by the benchmark scores. The data shows a processor that is slightly slower in every test but requires less power and carries a defined price point, making it a sensible choice for mainstream ultrabooks where battery life matters more than the last 20% of rendering performance.