Intel Core i5-1245U vs Intel Core i9-10980HK Comparison

The Intel Core i5-1245U and Intel Core i9-10980HK occupy different corners of the mobile processor market, yet benchmarking data places them in a surprisingly close contest. The i5-1245U is a modern low-power part from the Alder Lake generation, while the i9-10980HK is a previous-generation high-performance chip from Comet Lake. Across all six head-to-head Cinebench tests, the i5-1245U emerges as the winner, though the margins are consistently narrow. The average benchmark score for the i5-1245U is 3775, compared to 3706 for the i9-10980HK, a difference that places both processors at the 56th percentile of all CPUs.

Head-to-Head Benchmarks

The most striking pattern in the head-to-head data is the consistency of the i5-1245U's advantage. In multi-core tests, the i5-1245U scores 1315 in Cinebench R15, 5482 in R20, and 13053 in R23, while the i9-10980HK trails with 1291, 5381, and 12812 respectively. The deltaPct in each of these multi-core comparisons is 1.9%, meaning the i5-1245U leads by the same narrow margin across all three rendering workloads. This suggests the performance gap is structural rather than workload-specific, stemming from architectural efficiency rather than a single benchmark anomaly.

Single-core results follow the same trajectory, with the i5-1245U posting scores of 185 in R15, 773 in R20, and 1842 in R23. The i9-10980HK achieves 182, 759, and 1808 in the same tests, yielding deltaPct values of 1.6%, 1.8%, and 1.9% respectively. The single-core margin grows slightly with each newer version of Cinebench, hinting that the i5-1245U's advantage becomes more pronounced in modern workloads that better utilize its newer architecture. However, the overall picture is one of near-parity; the i5-1245U wins all six tests, but no single victory exceeds 1.9%.

The i9-10980HK's higher boost clock of 5.30 GHz compared to the i5-1245U's 4.40 GHz does not translate into a performance lead. In fact, the i5-1245U manages to outpace the i9-10980HK despite a 0.90 GHz deficit in maximum clock speed. This indicates that the i5-1245U's architectural improvements in instructions per clock more than compensate for its lower frequency ceiling. The data shows a clean sweep for the i5-1245U, with 6 wins out of 6 head-to-head benchmarks.

Architecture Differences

The two processors represent fundamentally different design philosophies. The i5-1245U is built on Intel's 10 nm process node, while the i9-10980HK uses the older 14 nm node. This process advantage is a key factor in the i5-1245U's ability to match or exceed the i9-10980HK's performance while operating at a dramatically lower TDP of 15 watts versus 45 watts for the i9-10980HK.

The core configurations differ significantly. The i5-1245U features 10 cores and 12 threads, while the i9-10980HK has 8 cores and 16 threads. The i5-1245U relies on its Alder Lake architecture, which combines performance and efficiency cores, whereas the i9-10980HK uses the older Comet Lake architecture with conventional cores. Despite having fewer total threads, the i5-1245U still wins multi-threaded benchmarks, suggesting that its core design is more efficient per thread.

Cache hierarchies also diverge. The i5-1245U has 80 KB of L1 cache per core and 1.25 MB of L2 cache per core, while the i9-10980HK offers 64 KB L1 and 256 KB L2 per core. However, the i9-10980HK has a larger shared L3 cache at 16 MB compared to the i5-1245U's 12 MB. The i5-1245U's larger per-core L1 and L2 caches likely contribute to its single-core advantage, despite the i9-10980HK's larger L3 pool.

Memory support and PCIe capabilities further distinguish the two. The i5-1245U supports both DDR4 and DDR5 memory in dual-channel configuration, while the i9-10980HK is limited to DDR4. The i5-1245U also offers PCIe Gen 4 with 20 lanes, whereas the i9-10980HK provides PCIe Gen 3 with 16 lanes. These differences reflect the generational gap between Alder Lake and Comet Lake.

Where Each One Wins

Based on the benchmark data, the i5-1245U wins every measured workload category. Its victories in both single-core and multi-core Cinebench tests indicate that it is the superior choice for rendering, productivity, and general-purpose computing tasks. The consistency of its 1.9% multi-core advantage across R15, R20, and R23 suggests that it handles sustained multi-threaded loads slightly better than the i9-10980HK.

The i9-10980HK, despite losing all benchmarks, retains advantages in areas not captured by Cinebench scores. Its higher boost clock of 5.30 GHz could benefit bursty single-threaded workloads that rely on maximum frequency rather than sustained throughput, though the data does not show this translating into a Cinebench win. The i9-10980HK's 45 watt TDP and unlocked multiplier indicate it is designed for high-performance laptops where power draw is less constrained, and enthusiasts may prefer its overclocking capability.

The i5-1245U's 15 watt TDP makes it fundamentally better suited for thin-and-light laptops and devices where thermal management is critical. Its support for DDR5 memory and PCIe Gen 4 provides a forward-looking platform that can take advantage of newer storage and memory technologies. The i9-10980HK, being end-of-life production status, lacks this future-proofing.

Specification Differences

The most obvious specification gap is in core count, with the i5-1245U offering 10 cores versus the i9-10980HK's 8 cores. However, the i9-10980HK has 16 threads compared to the i5-1245U's 12 threads, meaning the i9-10980HK uses Hyper-Threading more aggressively. Base clocks differ substantially, with the i5-1245U running at 1600 MHz and the i9-10980HK at 2400 MHz, but the i5-1245U's boost clock of 4.40 GHz falls short of the i9-10980HK's 5.30 GHz.

The TDP difference is stark: 15 watts for the i5-1245U versus 45 watts for the i9-10980HK. This threefold power disparity explains why the i5-1245U can be deployed in fanless or low-profile designs. Socket compatibility differs as well, with the i5-1245U using Intel BGA 1744 and the i9-10980HK using Intel BGA 1440, meaning they are not interchangeable in any system.

Process technology separates the two by one full generation node, with the i5-1245U on 10 nm and the i9-10980HK on 14 nm. The integrated graphics also differ, with the i5-1245U featuring Iris Xe 80EU and the i9-10980HK using the older UHD Graphics. The i9-10980HK has an unlocked multiplier for overclocking, a feature absent from the i5-1245U. Release dates place the i5-1245U in February 2022 and the i9-10980HK in April 2020.

FAQ

Q: Which processor has higher multi-core performance in Cinebench R23?

A: The Intel Core i5-1245U scores 13053 in Cinebench R23 multi-core, while the Intel Core i9-10980HK scores 12812, giving the i5-1245U a 1.9% advantage.

Q: Do the two processors have the same number of cores?

A: No, the i5-1245U has 10 cores and 12 threads, while the i9-10980HK has 8 cores and 16 threads.

Q: What is the TDP of each processor?

A: The i5-1245U has a TDP of 15 watts, while the i9-10980HK has a TDP of 45 watts.

Q: Which processor supports DDR5 memory?

A: The i5-1245U supports both DDR4 and DDR5 memory, whereas the i9-10980HK supports only DDR4.

Q: How do their single-core benchmark scores compare?

A: The i5-1245U leads in all single-core tests, including a 1.9% advantage in Cinebench R23 single-core (1842 vs 1808) and a 1.6% advantage in Cinebench R15 single-core (185 vs 182).

Q: Is the i9-10980HK still in production?

A: No, the i9-10980HK is listed as end-of-life production status, while the i5-1245U is active.

The Verdict

The benchmark data presents a clear but nuanced picture. The Intel Core i5-1245U wins all six head-to-head comparisons, making it the better performer in every Cinebench workload measured. Its 1.9% multi-core lead and 1.6-1.9% single-core lead are consistent across all tests, demonstrating that the newer Alder Lake architecture delivers superior efficiency. This is particularly impressive given the i5-1245U's 15 watt TDP, which is one-third of the i9-10980HK's 45 watt TDP.

For users prioritizing raw benchmark scores, the i5-1245U is the clear choice. It offers comparable or better performance while consuming significantly less power, making it ideal for ultraportable laptops and devices where battery life and thermal output are primary concerns. Its support for DDR5 memory and PCIe Gen 4 also provides a more modern platform.

The i9-10980HK retains appeal for a specific audience: those who need its unlocked multiplier for overclocking or who require the higher base clock of 2400 MHz for sustained low-load operations. Its 16 threads, despite fewer physical cores, may benefit certain heavily threaded applications that scale well with thread count. However, the data shows no benchmark where the i9-10980HK outperforms the i5-1245U.

The i9-10980HK's launch MSRP was $643, but pricing discussions are not relevant to the performance analysis. Given the i5-1245U's sweep of all benchmarks, lower TDP, and active production status, the data strongly favors the i5-1245U for most users. The i9-10980HK is best suited for legacy systems or specialized use cases requiring its unique combination of overclocking support and high thread count, but the benchmark evidence places the i5-1245U ahead on every measured metric.