Intel Core i5-8365U

The Intel Core i5-8365U is a mobile processor from the Whiskey Lake generation, built on Intel's 14 nm process. It has 4 cores and 8 threads, with a base clock of 1600 MHz and a boost clock of 4.10 GHz. The chip carries a 15 W TDP, uses the Intel BGA 1528 socket, and includes UHD Graphics 620. It supports dual-channel DDR4 memory with 38.4 GB/s bandwidth and provides PCIe Gen 3 with 16 lanes (CPU only). Released on 2019-04-15, the part is now end-of-life; its launch MSRP is $297.

Benchmark Performance

The i5-8365U records an average benchmark score of 8711, which places it in the 69th percentile of all CPUs. That percentile indicates a mid-to-upper mobile part, above the majority of processors but not near the top of the database. The nearest rival, the Intel Core i9-13900E, averages 8717, a gap of only 0.1% in favor of the i9-13900E. The i5-8365U is effectively in the same performance band as that chip despite the difference in market positioning.

In Cinebench R23, the multi-core score is 5078 and the single-core score is 717. In Cinebench R20, the multi-core score is 2132 and the single-core score is 301. In Cinebench R15, the multi-core score is 511 and the single-core score is 72. These scores are consistent with a 4-core, 8-thread mobile processor that can handle moderate rendering but will not challenge high-core-count workstation parts. PassMark results follow the same pattern: the multithread score is 5976, while the single-thread score is 2073. Data compression reaches 76239, integer math 22021, floating-point math 13110, random string sorting 10256, extended instructions 5074, data encryption 2006, physics 422, and find prime numbers 19.

The aggregate position is tightly clustered with its nearest rivals. The i5-8365U is 0.1% below the i9-13900E, 0.7% above the Intel Core i7-8565U, and 1.1% above both the AMD EPYC 7601 and the Intel Core i5-8265U. All four comparison points lie within 1.1% of the i5-8365U's average score, so the overall performance class is nearly identical across this group.

Single-Thread vs Multi-Thread Behavior

Single-thread performance is defined by modest absolute scores: Cinebench R15 single-core 72, R20 single-core 301, R23 single-core 717, and PassMark single-thread 2073. The boost clock of 4.10 GHz is high relative to the base clock of 1600 MHz, which suggests the chip can temporarily raise frequency for lightly threaded tasks. Multi-thread scores are higher: Cinebench R15 multi-core 511, R20 multi-core 2132, R23 multi-core 5078, and PassMark multithread 5976. The presence of 8 threads from 4 cores allows parallel execution, but the scaling from single to multi is not extreme. This indicates that workloads with only a few active threads will benefit from the high boost clock, while heavily parallel workloads will be limited by the four physical cores.

PassMark sub-scores reinforce this split. Data compression at 76239 is strong, likely benefiting from both the threads and the 6 MB shared L3 cache. Integer math at 22021 and floating-point math at 13110 show a balance between integer and FP operations. Random string sorting at 10256 and extended instructions at 5074 are moderate. In contrast, data encryption at 2006 and find prime numbers at 19 are low, suggesting weak performance in encryption and prime-number workloads. The physics score of 422 is also low, which indicates limited suitability for physics simulation or heavy scientific computing.

How It Compares

Against the Intel Core i9-13900E, the i5-8365U is essentially tied. The i9-13900E has an average score of 8717, and the i5-8365U trails by 0.1%. That difference is negligible in an aggregate benchmark.

Against the Intel Core i7-8565U, the i5-8365U leads by 0.7%. The i7-8565U averages 8647, so the i5-8365U's 8711 is slightly higher. For most applications, the two would be indistinguishable.

Against the AMD EPYC 7601, the i5-8365U is 1.1% ahead. The EPYC 7601 averages 8619. Despite the EPYC's server-oriented design, the aggregate benchmark score is nearly the same.

Against the Intel Core i5-8265U, the i5-8365U is also 1.1% ahead. The i5-8265U averages 8617. This is the closest generational sibling in the list, and the performance gap is minimal.

FAQ

Q: What socket does the Intel Core i5-8365U use?

A: It uses the Intel BGA 1528 socket.

Q: What is the cache configuration?

A: It has 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 6 MB of shared L3 cache.

Q: Does it support ECC memory?

A: No, ECC memory is not supported.

Q: What integrated graphics does it include?

A: It includes UHD Graphics 620.

Q: What is the TDP?

A: The TDP is 15 W.

Q: What is the production status?

A: The production status is end-of-life.

Power and Thermals

The i5-8365U is a 15 W TDP part, which places it in the low-power mobile segment. This TDP class is typically paired with compact cooling solutions in thin-and-light laptops; no large desktop cooler is required. The 14 nm process and Whiskey Lake-U architecture are consistent with that power envelope. The base clock of 1600 MHz and boost clock of 4.10 GHz show a wide frequency range, allowing the processor to idle low and burst high when needed. The integrated UHD Graphics 620 shares the same thermal budget, so sustained CPU and GPU loads will affect available boost headroom. The mobile market segment and BGA socket indicate a board-mounted design rather than a socketed desktop part. For system builders, a capable air cooler designed for 15 W-class mobile chips is sufficient.

Who Should Consider It

Users with everyday productivity workloads will find the i5-8365U adequate. The PassMark integer math score of 22021 and data compression score of 76239 suggest solid performance for office applications, file compression, and general multitasking. The dual-channel DDR4 memory interface with 38.4 GB/s bandwidth supports memory-sensitive tasks without a major bottleneck. For light content creation, the Cinebench R23 multi-core score of 5078 indicates that occasional photo editing or short video encodes are possible, but sustained heavy rendering will be limited by the four physical cores and 8 threads. The PassMark single-thread score of 2073, along with the 4.10 GHz boost clock, helps responsive user interfaces and lightly threaded applications.

Gamers should note that the integrated UHD Graphics 620 is the only GPU on the chip; the low PassMark physics score of 422 and low find-prime score of 19 are not indicative of gaming capability. However, the PCIe Gen 3 with 16 lanes (CPU only) allows expansion options in a system that supports them. The 69th percentile overall ranking means it is not a high-end part, but for a 15 W mobile chip it sits in a competitive band. Because it is end-of-life, it is more likely to be found in existing laptops than in new system builds. For workloads that require ECC memory or high encryption throughput, the lack of ECC support and the data encryption score of 2006 are clear limitations.