Intel Core i5-8250U

The Intel Core i5-8250U is a 14 nm Kaby Lake-R mobile processor with 4 cores and 8 threads, base clock of 1600 MHz, and a boost clock of 3.40 GHz. It sits in the 69th percentile of all CPUs tracked, with an average benchmark score of 8579. Its nearest rivals in the database are a tight cluster: the Intel Core i7-10510U (avg 8588, -0.1% delta), the Intel Core i5-8265U (avg 8617, -0.4% delta), the AMD EPYC 7601 (avg 8619, -0.5% delta), and the Intel Pentium Gold G7400 (avg 8514, +0.8% delta). This is a processor that lands squarely in a competitive no-man's land where a few percentage points separate it from both a server-class EPYC part and a desktop Pentium.

Benchmark Performance

The i5-8250U’s aggregate score of 8579 places it just 0.1% behind the Core i7-10510U, a margin so thin it is effectively a statistical tie. Against the Core i5-8265U, the delta is -0.4%, again negligible in real-world terms. The most interesting comparison is against the AMD EPYC 7601: the 8250U trails it by only 0.5% in average score, despite the EPYC being a server processor with far more cores. That speaks to the 8250U’s efficiency in single-thread-heavy workloads rather than raw throughput. Conversely, the Pentium Gold G7400 is 0.8% ahead of the 8250U, which shows that a modern desktop dual-core can match this older quad-core mobile part in overall score.

Looking at specific Cinebench results, the R23 multi-core score of 4940 is the headline number. That is roughly 2.4x the R23 single-core score of 697, a ratio that indicates the 4-core/8-thread design scales reasonably under full load. In R20, the multi-core score is 2074 versus 292 single-core, a 7.1x ratio that is distorted by the single-core score being unusually low for this generation. The R15 data shows 497 multi-core and 70 single-core, a 7.1x ratio again, confirming that the single-core performance is the weaker link in this chip’s profile.

PassMark results reinforce this split. The multi-thread score is 5812, while the single-thread score is 1886. The single-thread figure puts it in the same league as the Pentium Gold G7400’s overall average, but the multi-thread score is what separates it from weaker dual-core parts. Integer math scores 20885, floating-point math scores 12706, and extended instructions score 4920. Data compression hits 76521, which is a strong result for a 15-watt part, while data encryption is 1979 and find prime numbers is 18. Physics simulation scores 405, and random string sorting scores 10257. The compression score is particularly notable—it suggests the 8250U handles archive extraction and file I/O tasks better than its modest multi-thread scores would imply.

The deltaPct values against rivals are all under 1%, which means the 8250U is essentially interchangeable with the i7-10510U and i5-8265U in average performance. Any benchmark run could swing the result either way. The practical takeaway is that if you own an 8250U laptop, upgrading to a 10th-gen U-series chip buys you almost nothing in raw compute. The EPYC 7601 comparison is a curiosity—the 8250U holds its own in aggregate because the EPYC’s massive core count is offset by lower single-thread efficiency in these specific tests.

Platform and Compatibility

The i5-8250U uses the Intel BGA 1356 socket, which means it is soldered to the motherboard and not upgradeable. This is a mobile part designed for ultrabooks and thin-and-light laptops, so the socket choice is expected. The architecture is Kaby Lake, specifically codename Kaby Lake-R, part of the Core i5 (Kaby Lake-U Refresh) generation. It is built on Intel’s 14 nm process node, with a die size of 123 mm². The processor remains in active production status, which is notable given its 2017 release date—Intel has kept this part in the lineup for budget and entry-level laptops.

Memory support is DDR4 only, with no ECC capability. The lack of ECC is not a concern for consumer laptops, but it does rule out this chip for any workstation or server use case. The integrated graphics is UHD 620, which is sufficient for basic display output and video playback but not for gaming beyond casual titles. PCIe details are not specified in the data, so the lane configuration and version cannot be confirmed. The multiplier is locked, so no overclocking is possible. The part number is SR3LA.

The upgrade path is effectively zero for the CPU itself, but the platform’s longevity depends on the laptop manufacturer. Since the chip is BGA-soldered, the only upgrades available are RAM and storage. The 14 nm process and DDR4 support are both older standards, meaning this platform is at the end of its relevance for new builds. However, for an existing laptop, the 8250U is still a functional daily driver, provided the rest of the system—RAM, SSD, and battery—is healthy.

Who Should Consider It

For office productivity and web browsing, the 8250U is entirely adequate. The single-thread score of 1886 in PassMark and R23 single-core of 697 indicate that spreadsheet work, document editing, and browser tabs will feel responsive. The multi-thread score of 5812 in PassMark means that background tasks like antivirus scans or system updates will not grind the machine to a halt. This is a chip for someone who needs a reliable workhorse for typing, email, and video conferencing, not for heavy number-crunching.

Content creation on this chip is a mixed bag. The R23 multi-core score of 4940 is enough for light photo editing in tools that use multiple cores, but video rendering will be slow. The data compression score of 76521 suggests that archiving large files is a relative strength, so users who frequently zip or unzip project folders will see decent throughput. The floating-point math score of 12706 indicates that physics simulations or complex financial models are not this chip’s forte. For a student running MATLAB or a hobbyist editing 1080p video, the 8250U will complete the job but with patience.

Gaming is not a primary use case. The UHD 620 integrated graphics has no dedicated benchmark in this data, but the CPU’s single-thread performance is modest by modern standards. The R15 single-core score of 70 is low, which will bottleneck older games that rely on a single thread. The Pentium Gold G7400, which is 0.8% ahead in average score, is a desktop part with higher clock speeds, so it would be a better budget gaming CPU if you have a discrete GPU. For the 8250U, the realistic gaming ceiling is esports titles at low settings.

The data suggests this chip is best suited for a secondary laptop, a student machine, or a basic office laptop where battery life and silence matter more than raw performance. The 15-watt TDP class means it runs cool and quiet, and the 4-core/8-thread layout handles modern multitasking without stuttering.

FAQ

Q: How does the Core i5-8250U compare to the Core i7-10510U?

A: The average benchmark scores are 8579 for the 8250U and 8588 for the i7-10510U, a delta of -0.1%. The 8250U is effectively tied with the i7-10510U in overall performance.

Q: Is the Core i5-8250U good for multi-threaded workloads?

A: It scores 4940 in Cinebench R23 multi-core and 5812 in PassMark multi-thread. This is adequate for light parallel tasks but trails server parts like the AMD EPYC 7601 by only 0.5% in average score, which is surprising given the EPYC’s core count.

Q: What is the single-thread performance of this chip?

A: The PassMark single-thread score is 1886, and the Cinebench R23 single-core score is 697. These numbers are modest, putting it behind modern desktop chips but acceptable for everyday tasks.

Q: Does this processor support ECC memory?

A: No, ECC memory is not supported. The memory support is DDR4 only, with no ECC capability.

Q: Can I overclock the Core i5-8250U?

A: No, the multiplier is locked. The boost clock is fixed at 3.40 GHz, and there is no overclocking headroom.

Q: What is the production status of the i5-8250U?

A: The production status is listed as Active, meaning Intel still manufactures this part despite its 2017 release date.

Power and Thermals

The TDP is 15 watts, which is the standard power envelope for a U-series mobile processor. This is a low-power part designed for thin-and-light laptops where cooling is limited. The 14 nm process node from Intel is mature, and the 123 mm² die size is small, so heat dissipation is manageable with a basic cooling solution. A thin heatsink with a small fan is sufficient; no exotic cooling is required.

Because the TDP is 15 watts, the chip will not sustain high clocks indefinitely under full load. The base clock of 1600 MHz is low, and the boost clock of 3.40 GHz is likely only achieved in short bursts on a single core. Under sustained multi-core load, the chip will settle closer to its base clock to stay within the power budget. This means thermals are rarely a concern, but performance consistency is limited.

For a laptop buyer, this TDP class implies that the machine will be quiet and run cool during light tasks. Under heavy load, the fan may spin up, but the heat output is small enough that even a poorly designed chassis can handle it. The integrated UHD 620 graphics adds some thermal load during video playback, but it is not a significant contributor. The practical advice is to ensure the laptop has adequate ventilation, but not to worry about thermal throttling in most scenarios.

Single-Thread vs Multi-Thread Behavior

The single-thread performance is the clear weakness of this chip. The Cinebench R23 single-core score of 697 is low, and the PassMark single-thread score of 1886 is unremarkable. The R15 single-core score of 70 is particularly telling—this is a generation of Intel processors that did not prioritize single-core speed, instead focusing on adding cores and threads to the mobile lineup. For tasks like opening applications, scrolling web pages, or running legacy software that uses one core, the 8250U will feel adequate but not snappy.

The multi-thread behavior is where the chip redeems itself. The R23 multi-core score of 4940 is more than 7 times the single-core score, which shows that the 8 threads are being utilized effectively. The R20 multi-core score of 2074 and R15 multi-core score of 497 follow a similar pattern. In PassMark, the multi-thread score of 5812 is roughly 3 times the single-thread score, reflecting the benefits of 4 cores with Hyper-Threading. The data compression score of 76521 is a standout, indicating that the chip excels at parallelizable tasks that do not require high memory bandwidth.

The practical implication is that the 8250U is a multitasking chip, not a speed demon. If your workflow involves running several applications simultaneously—say, a browser with 20 tabs, a word processor, and a music player—the multi-thread capability will keep everything responsive. But if you need fast single-core performance for tasks like spreadsheet recalculation or code compilation that is not well-threaded, you will notice the lag. The deltaPct of -0.4% against the i5-8265U shows that the 8250U is not even the best in its own generation, but it is close enough that the difference is imperceptible in blind testing. This is a chip that rewards patience and punishes expectations of high clock speeds.