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Abde Manaf

At HI Digital I test and write about different hardware configurations to show other PC users what they can expect from their build. My end goal is to educate the masses to make the right decision when they are looking for new PC parts to buy

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Intel has traditionally had two lines of processors for thin and light ultrabooks. One is denoted by the letter U (Standing for Ultra-low power) at the end of the product name, while the other is denoted by P (Standing for Performance). In this comparison, we will show you the difference between the Core i5 1240P vs Core i5 1235U to highlight the strengths and weaknesses of both processors offered by Intel.

Key Takeaways

• Our productivity assessments revealed that the Core i5 1240P offered a marginal 2% performance improvement over the Core i5 1235U.
• In terms of power consumption, the Core i5 1235U proved to be more efficient, drawing around 11% less power than the power-hungry Core i5 1240P.
• A notable architectural difference is that the Core i5 1240P boasts 4 performance cores, while its counterpart, the Core i5 1235U, features 2 performance cores.

Comparison Table

Architectural Differences

1. Core Count: The 1240P and 1235U both use Intel’s big.LITTLE hybrid core architecture. The 1240P boasts 4 performance cores, while the 1235U falls short with only 2 performance cores. However, they both have 8 efficiency cores, resulting in the 1240P having 16 threads and the 1235U having 12 threads.
   
2. Frequency: The boost clock of both processors is identical; 4.40GHz, whereas the U series processor has a lower base clock of 900MHz while the 1240P has a base clock of 1.20GHz.
3. Thermal Design Power: The Core i5 1235U operates with a lower TDP of 15W, whereas the Core i5 1240P has a higher TDP of 28W.
4. L3 Cache: Moreover, both processors are equipped with an identical 12MB of L3 cache.
5. Manufacturing Process: Both these processors are crafted using a 10nm manufacturing process, emphasizing efficiency and performance in a compact package.

Also Read: Core i5 1235U Vs Ryzen 5 7530U

Core i5 1240P Vs Core i5 1235U: Performance Benchmarks

Now that we’ve been educated on the differences between these two chips in terms of architecture, this part of the comparison will lay out the performance of both processors in a number of benchmarks. The numbers provided here represent the median benchmark scores gathered from various laptops.

Cinebench R23

• Kicking off our testing with synthetic benchmarks, Cinebench R23 had a surprisingly better single-core performance on the 1235U, which had a lead of about 3%. The 1235U had a score of 1640 points, whereas the 1260P scored slightly lower, with a performance of about 1607 points.
• Cinbench’s multi-core tests showed the 1240P to be a whopping 24% more performant than the 1235U. It had a score of about 8195 points, whereas the 1235U had a much lower score, rounding out to about 6600 points.

Geekbench 5.4

• Opposite to our Cinebnech test, Geekbench showed the 1240P to be about 3% faster in terms of single-core performance. It scored about 1588 points, which was a tad higher than the 1235U, which scored about 1546 points.
• This test also showed a different result in terms of multi-core performance, with the lead of the 1240P being shrunk to 16%. In terms of the actual numbers, the 1240P had a score of 7848 points, whereas the 1235U had a score of around 6745 points.

7-Zip

• Our testing of the 7-Zip benchmark on both processors showed almost no difference in the performance of either CPU.
• The 1235U had a score of 33736 MIPS in the 7-Zip multi-threaded test, whereas the 1240P managed to have a performance of 33826 MIPS.

Blender

• Blender showed a very slight improvement in performance from the 1235U over to the 1240P. The latter only had a 2% lead in the Classroom render. It finished the render in 846 seconds, whereas the 1235U finished the same scene in about 839 seconds.
• The BMW scene had the same difference between the performance of the two processors. It took 423 seconds to render on the 1235U, whereas the 1240P finished it ten seconds faster at 413 seconds.

3DMark 11

• This popular physics renderer also had almost no difference in the performance of the two processors. 
• The i5 1235U had a score of 11915 points when it ended this test, whereas the 1240P scored 11901 points.

FP32

• There was a notable difference in performance between these two chips in FP32. The 1240P led with 8%, indicating a stronger integrated GPU.
• The P series chip had a performance of 1611 GFLOPS in this test, while the 1235U was behind with a performance of only 1487 GFLOPS.

Power Consumption

• The U series processor had lived up to its name by consuming 11% less power when we tested it with repeated runs of Cinebench R23.
• The 1240P had a power consumption of 28 watts, whereas the 1235U consumed only 25 watts of power.

Core i5 1235U Vs Core i5 1240P: Which One Should You Go For?

Having tallied the benchmark results put forth in this comparison, this part of the Core i5 1240P vs Core i5 1235U comparison will paint a picture of which processor best suits your needs.

• The 1240P showed improvements in synthetic benchmarks but fell behind when tested with productivity software.
• The 1240P’s multicore performance is beneficial for specific applications.
• The i5 1235U is sufficient for most people and performs similarly to the higher-end counterpart while consuming less power.

Are you concerned about how much life these processors have in them, considering they are a generation old? Read our guide on how long laptops last.

Abde Manaf

[How-To Guides Expert]

Laiba, our tech guru at HI Digital, simplifies and crafts How-To Guides with a Google IT Support Certificate. Beyond tech, she captures the city’s aesthetics through her lens. Join her journey where tech meets creativity!

Get In Touch: Laiba@hidgt.com