Intel Core i7-10850H vs Intel Core i7-1260U Comparison

The Intel Core i7-1260U and the Intel Core i7-10850H represent two distinct design philosophies for mobile computing. The i7-1260U, built on Alder Lake-U architecture, is engineered for efficiency with a 9W TDP, while the i7-10850H, a Comet Lake-H part, is a 45W processor designed for sustained performance. Despite the i7-10850H having a higher boost clock, the benchmark data shows the i7-1260U winning 15 out of 19 head-to-head comparisons, though the i7-10850H secures decisive victories in specific workloads that favor its architecture.

Where Each One Wins

The performance split between these two CPUs is clear and workload-dependent. The Intel Core i7-1260U dominates in nearly every category that emphasizes single-threaded execution and modern instruction efficiency. Its strongest advantages appear in encryption, prime number finding, and physics simulations, where it leads by margins of 143.7%, 63.4%, and 45.7% respectively. The i7-1260U also wins all Geekbench tests, including a 45.9% lead in single-core, which suggests superior per-thread performance despite its lower power envelope.

The Intel Core i7-10850H, conversely, stakes its claim in sustained multi-core rendering and specific data-processing tasks. Its most notable victory is in Cinebench R23 multi-core, where it beats the i7-1260U by 19.1%. The i7-10850H also wins in data compression, random string sorting, and extended instructions, with margins of 8.2%, 22.3%, and 20.2% respectively. These wins indicate that for tasks which can fully utilize its six physical cores over long durations, the i7-10850H’s higher power budget and boost clock of 5.10 GHz translate into tangible advantages.

The overall picture is that the i7-1260U is the better choice for mixed-use scenarios, short bursts of heavy work, and any task sensitive to single-thread speed. The i7-10850H excels in specific, heavily threaded workloads like video rendering and data compression, where its architecture can sustain higher clocks under load. The data shows the i7-1260U winning 15 benchmarks, while the i7-10850H wins only 4, yet those 4 wins are often in tests that represent professional content creation workloads.

Architecture Differences

The two processors are built on fundamentally different underlying technologies. The i7-1260U uses Intel’s Alder Lake architecture on a 10 nm process node, featuring a hybrid core design with 10 cores and 12 threads. Its L1 cache is 80 KB per core, L2 cache is 1.25 MB per core, and it shares 12 MB of L3 cache. The i7-10850H, in contrast, uses the older Comet Lake architecture on a 14 nm process, with 6 cores and 12 threads. Its cache hierarchy is smaller per core: 64 KB L1, 256 KB L2, though it also has 12 MB of shared L3 cache.

Memory support differentiates them significantly. The i7-1260U supports both DDR4 and DDR5 memory in a dual-channel configuration, while the i7-10850H is limited to DDR4. The i7-10850H does have a specified memory bandwidth of 46.9 GB/s, a figure not provided for the i7-1260U. PCIe support also differs, with the i7-1260U offering Gen 4, while the i7-10850H provides Gen 3 with 16 lanes (CPU only).

The integrated graphics are another major differentiator. The i7-1260U features Iris Xe 96EU, which typically offers substantially better GPU performance than the UHD Graphics found in the i7-10850H. The i7-1260U’s base clock is 1100 MHz, boosting to 4.70 GHz, while the i7-10850H has a base clock of 2.70 GHz and a boost of 5.10 GHz. The i7-1260U is built for a BGA 1781 socket, whereas the i7-10850H uses BGA 1440. Neither processor has an unlocked multiplier, and both target the mobile market segment.

Head-to-Head Benchmarks

The most dramatic single result is in PassMark data encryption, where the i7-1260U scores 9480 against the i7-10850H’s 3890, a 143.7% advantage. This suggests the i7-1260U has hardware-level acceleration or more efficient instruction handling for cryptographic workloads. Similarly, in PassMark find prime numbers, the i7-1260U scores 67 versus 41, a 63.4% lead, indicating stronger integer and logic performance per clock.

In single-core performance, the i7-1260U is consistently superior. It leads by 57.9% in Cinebench R15 single-core (219.5 vs 139), by 15.2% in Cinebench R20 single-core (668 vs 580), and by 15.9% in Cinebench R23 single-core (1601 vs 1381). Geekbench single-core shows a 45.9% lead (1936 vs 1327), and PassMark single-thread shows an 18.2% advantage (3153 vs 2668). These results confirm that for everyday responsiveness and lightly threaded applications, the i7-1260U is decisively faster.

Multi-core results are more nuanced. The i7-1260U wins Cinebench R15 multi-core by 22% (1203 vs 986) and Cinebench R20 multi-core by 15.2% (4736 vs 4110). However, in Cinebench R23 multi-core, the i7-10850H reverses the trend, scoring 9786 against 7912.5, a 19.1% victory. This discrepancy between R20 and R23 suggests the longer R23 workload allows the i7-10850H to sustain higher clocks over an extended period, overcoming the i7-1260U’s initial burst advantage.

The i7-1260U also wins PassMark multi-thread by 20.3% (14011 vs 11643), floating point math by 24.7% (31456 vs 25216), integer math by 15% (45887 vs 39919), and physics by 45.7% (1046 vs 718). The i7-10850H’s remaining wins include data compression (165882 vs 152217, +8.2%), extended instructions (10381 vs 8280, +20.2%), and random string sorting (21537 vs 16726, +22.3%). These latter wins point to specific SIMD and memory-access patterns where the older architecture still holds an edge.

The Verdict

From the data, the Intel Core i7-1260U is the superior processor for the vast majority of workloads. It wins 15 of 19 benchmarks, often by large margins, and its single-core performance is categorically better across every test. The i7-1260U also matches or exceeds the i7-10850H in most multi-core tests, with the notable exception of Cinebench R23 multi-core. For users who prioritize encryption, physics, integer math, or general productivity, the i7-1260U is the clear choice. Its 9W TDP also indicates it will generate far less heat and consume less power, making it ideal for thin-and-light laptops.

The Intel Core i7-10850H is the pick only for a narrow set of use cases. Its 19.1% win in Cinebench R23 multi-core suggests it can sustain high multi-core performance for prolonged rendering sessions. Its wins in data compression, random string sorting, and extended instructions also indicate strengths in specific data-processing and scientific workloads. However, these 4 wins come with a 45W TDP, which requires more robust cooling and reduces battery life. The i7-10850H’s 5.10 GHz boost clock does not translate into single-core wins, as the i7-1260U’s architecture proves more efficient per clock.

Overall, the i7-1260U offers a better balance of performance and efficiency. The i7-10850H remains relevant only for users whose workloads specifically benefit from its sustained multi-core behavior, as evidenced by the R23 result. For all other purposes, the benchmark data favors the i7-1260U, which also provides newer memory support and a more modern platform.

FAQ

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

A: The Intel Core i7-1260U is consistently faster in single-core tests. It leads by 57.9% in Cinebench R15 single-core and by 45.9% in Geekbench single-core.

Q: Does the Intel Core i7-10850H ever beat the i7-1260U in multi-core tests?

A: Yes, the i7-10850H wins Cinebench R23 multi-core by 19.1%, scoring 9786 versus 7912.5. However, the i7-1260U wins Cinebench R15 and R20 multi-core tests.

Q: What is the most significant performance gap between the two?

A: The largest gap is in PassMark data encryption, where the i7-1260U scores 9480 versus 3890, a 143.7% advantage for the i7-1260U.

Q: Which processor has a higher boost clock?

A: The Intel Core i7-10850H has a boost clock of 5.10 GHz, while the Intel Core i7-1260U boosts to 4.70 GHz.

Q: How do the core counts compare?

A: The i7-1260U has 10 cores and 12 threads, while the i7-10850H has 6 cores and 12 threads.

Q: Which processor supports DDR5 memory?

A: The Intel Core i7-1260U supports both DDR4 and DDR5 memory. The Intel Core i7-10850H only supports DDR4.