Intel Core i5-8350U

The Intel Core i5-8350U is a 15-watt mobile processor from the Kaby Lake-R generation, built on Intel's 14 nm process. It integrates four cores with eight threads, a base clock of 1700 MHz, and a boost clock of 3.60 GHz. The benchmark data positions this chip within the middle tier of the database, holding the 69th percentile among all CPUs tested, with an average benchmark score of 9001.

Benchmark Performance

The Core i5-8350U's aggregate performance places it in a tightly contested cluster. Its average score of 9001 is statistically near-identical to its closest rivals, with all deltas within a 1.3% range. The data shows a marginal 0.6% deficit against the Intel Xeon Platinum 8280, a high-end server part, which translates to a negligible difference of 54 points. Conversely, the 8350U edges out the Intel Core i3-8100 by 0.6% and the Intel Core i7-8650U by 0.8%, demonstrating that its overall compute capability is essentially on par with both a desktop quad-core and a higher-tier mobile SKU.

In multi-threaded workloads, the processor demonstrates consistent scaling. The Cinebench R23 multi-core score of 5208 points reflects a strong showing for a 15-watt part, while the R20 multi-core result of 2187 and R15 multi-core score of 524 corroborate this performance level. These figures indicate that the four physical cores with Hyper-Threading provide a solid foundation for parallel tasks, though the scores are not exceptional when compared to higher-power desktop counterparts. Single-thread performance follows a similar pattern, with Cinebench R23 single-core scoring 735, R20 scoring 308, and R15 scoring 73. The PassMark single-thread score of 1996 further confirms that per-core throughput is adequate for everyday responsiveness but does not challenge higher-clocked desktop processors.

The PassMark suite reveals specific workload characteristics. Integer math scores 22244, while floating-point math reaches 13422, showing a reasonable balance between the two. Data compression performance is notably robust at 79781, suggesting efficient handling of memory-bound operations. In contrast, data encryption scores 2075 and the extended instructions test scores 5243, indicating moderate cryptographic and SIMD throughput. The find prime numbers test yields a low 19, which is typical for a mobile chip under sustained load. The multithread score of 6129 aligns with the Cinebench results, reinforcing the conclusion that the 8350U delivers dependable multi-threaded output within its power envelope.

How It Compares

Intel Xeon Platinum 8280: The 8350U trails this enterprise-grade processor by 0.6% in average score. Despite the Xeon's much larger core count and cache hierarchy, the benchmark average shows only a 54-point gap. This result is surprising but reflects the specific mix of tests in the database, where the mobile chip's efficiency and boost behavior keep it competitive in aggregate.

Intel Core i3-8100: The 8350U holds a 0.6% advantage over this desktop quad-core. The i3-8100 operates at a higher base clock and has no Hyper-Threading, yet the 8350U's eight threads and higher boost clock allow it to slightly outperform in the synthetic suite. The delta of 0.6% is within measurement noise, indicating that the two are functionally equivalent for most applications.

Intel Core i7-8650U: This is the most direct comparison, as the i7-8650U is a sibling Kaby Lake-R part with the same core/thread configuration. The 8350U leads by 0.8%, a modest but consistent margin. The i7-8650U typically has a higher boost clock, but the data suggests that sustained performance and thermal management allow the i5 to match or exceed it in the tested benchmarks.

Intel Core i5-7500: Against this older desktop quad-core, the 8350U posts a 1.3% lead. The i5-7500 runs at higher clocks but lacks Hyper-Threading. The 8350U's multi-threading advantage and similar single-thread capability give it the edge in the aggregate score, though the difference is small enough to be considered a tie in real-world usage.

Power and Thermals

The Core i5-8350U is classified with a 15-watt TDP, which defines its entire thermal and power profile. This is a low-power design intended for thin-and-light laptops where cooling capacity is limited. The 14 nm process node helps keep heat generation manageable, but sustained multi-threaded workloads will still push the chip to its thermal limits. For cooling, a capable air cooler with a small fan or a passive heatsink paired with chassis airflow is sufficient. The data does not include specific thermal measurements, but the TDP class implies that no elaborate liquid cooling or oversized heatsink is necessary. Performance in short bursts will be higher than sustained loads, as the boost clock of 3.60 GHz can be maintained for brief periods before power limits throttle the processor back to its base frequency.

Platform and Compatibility

This processor uses the Intel BGA 1356 socket, meaning it is soldered directly to the motherboard and is not user-replaceable. It supports DDR4 memory, though the specific memory bus width and maximum bandwidth are not provided in the data. The integrated graphics solution is the UHD 620, which handles display output and basic acceleration without a discrete GPU. PCIe support details are not listed, so expansion capabilities cannot be quantified. The platform is built around the Kaby Lake architecture, specifically the Kaby Lake-R refresh, which is compatible with 300-series chipsets designed for the U-series mobile segment. The upgrade path is limited to the motherboard it is soldered to, so users should select a system with sufficient RAM and storage at the time of purchase. ECC memory is not supported, and the multiplier is locked, preventing overclocking. The production status is listed as Active, meaning this chip remains in current manufacture for laptop OEMs.

Who Should Consider It

The benchmark results indicate that the Core i5-8350U is suitable for users who need balanced performance in a mobile form factor. For office productivity, the single-thread score of 1996 in PassMark and the Cinebench R23 single-core result of 735 are more than adequate for word processing, spreadsheet work, and web browsing. The multi-thread scores, such as the 6129 in PassMark multithread and 2187 in Cinebench R20, support light content creation tasks like photo editing and video transcoding, though render-heavy 3D workloads will be slow. Gamers should consider this chip only for esports titles or older games, as the UHD 620 integrated graphics and modest compute performance will struggle with modern 3D games. The 69th percentile ranking means it outperforms a majority of CPUs in the database, but it is not a high-performance part for demanding workloads. Users who prioritize battery life and low heat output over raw speed will find this processor well-suited to daily tasks.

Single-Thread vs Multi-Thread Behavior

The split between single-thread and multi-thread performance is instructive for understanding this chip's behavior. The Cinebench R23 scores show a single-thread to multi-thread ratio of approximately 7.1x (5208 vs 735), which is typical for a 4-core/8-thread processor. The PassMark data mirrors this, with a single-thread score of 1996 against a multithread score of 6129, a ratio of 3.1x. The single-thread results are competitive with desktop quad-core parts from the same era, as evidenced by the 0.6% lead over the Core i3-8100. However, the multi-thread scores are constrained by the 15-watt TDP, which limits sustained all-core boost frequencies. In real workloads, applications that rely on one or two threads, such as web browsers and office suites, will see performance close to the 3.60 GHz boost clock. Conversely, multi-threaded tasks like video encoding or compiling will initially run at high speed but will settle to lower clocks as the processor hits its power ceiling. The data suggests that this chip is best suited for bursty workloads that alternate between light and moderate usage, rather than sustained heavy parallel processing. The 0.8% advantage over the i7-8650U in average score indicates that the 8350U manages its thermal budget effectively, delivering consistent performance without significant throttling in the tested scenarios.