GuidesComparisonsCore i5 1240P Vs Core i5 1235U - 7 Tests Performed

Core i5 1240P Vs Core i5 1235U – 7 Tests Performed

In this comparison we will compare the performance of the i5 1235U and the i5 1240P in synthetic and productivity benchmarks, whilst also discussing the difference in their performance and power consumption.

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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.
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Comparison Table

CPU Intel Core i5 1235U Intel Core i5 1240P
Core Architecture Intel Alder Lake-U Intel Alder Lake-P
Processing Node 10nm 10nm
Number of Cores  2 Performance
8 Efficiency
4 Performance
8 Efficiency
Number of threads 8 16
L3 Cache 12MB 12MB
Base Clock Speed 0.90GHz 1.20GHz 
Boost Clock Speed 4.40GHz 4.40GHz
TDP 15W 28W
Integrated Graphics Intel Iris Xe Graphics G7 80EUs Intel Iris Xe Graphics G7 80EUs

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

Cinebench R23 Performance
Cinebench R23 Performance (Image By Tech4Gamers)
  • 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

Geekbench 5.4 Performance
Geekbench 5.4 Performance (Image By Tech4Gamers)
  • 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 Performance
7-Zip Performance (Image By Tech4Gamers)
  • 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 Performance
Blender Performance (Image By Tech4Gamers)
  • 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

3DMark 11 Performance
3DMark 11 Performance (Image By Tech4Gamers)
  • 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 Performance
FP32 Performance (Image By Tech4Gamers)
  • 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

Power Consumption
Power Consumption (Image By Tech4Gamers)
  • 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.

Pros And Cons

CPU Pros Cons
Core i5 1235U
  • Better power efficiency
  • Slightly cheaper
  • Worse performance
Core i5 1240P
  • Better performance
  • Worse power draw
  • Slightly higher asking price

Frequently Asked Questions

Why is iGPU in the 1240P stronger than the 1235U despite it having the same name?

The 1240P from Intel has the luxury of a larger power budget than the 1235U, which allows its integrated GPU to boost higher than the one in the 1235U, causing a significant increase in performance.

Does the Core i5 1235U have a lower TDP than the Core i5 1240P?

Yes, the PL1 to PL2 range of the 1235U is significantly lower than the range of the 1240P.

Which processor is better for gaming?

Gaming laptops do generally have an H series processor, but the extra horsepower of the 1240P, along with its stronger iGPU, makes it a better option for gaming than the Core i5 1235U.

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