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Smartphones with the Same Processor have Different Performance, WHY?

Have you ever wondered that some smartphones that have the same processor or CPU differ in performance? Smartphones like Samsung S9, Pixel 3, LG V40, Razer Phone 2 and One Plus 6 have the same processor Snapdragon 845. Yet, these smartphones’ real-life performance, as well as Benchmarks, are not the same.

So the question arises, is there more to it than just looking at smartphone specifications?

In this article, I will try to explain all the factors in a smartphone processor that makes it different from other smartphones having the same processors.

Note: I am taking 2018 smartphones for this topic as we have a lot more data and users for smartphones of 2018 Flagships as compared to 2019. This is because of the declining sales of Flagship smartphones due to their prices skyrocketing to 1000$ Dollars.

Let’s start by explaining the different factors that make the performance of each smartphone processor different.

Processor Terms:

Processor, CPU (Central Processing Unit) are the same thing and SOC is a system-on-chip. System on the chip just means that GPU (Graphics Processing Unit), Modem, Processor, Ram, Internal Storage, and Input Outputs ports are embedded on one circuit.

Think of it this way, if you buy a computer motherboard that has a processor, ram, and everything Pre-Installed. This motherboard with pre-installed components would be the closest example of a system on a chip found in smartphones.

Want to understand other smartphone specifications too?

Let’s now dive into the factors that affect a smartphone processor performance.
Basically from what I understand, there are three factors:

  1. Processor Clock Speed or Frequency
  2. Cooling or Thermal Solution used in the smartphone
  3. Smartphone User Interface or Skin of Android

Processor Clock Speed or Frequency:

The first thing to get a sense of performance is to look at the base frequency of the processor chip from the manufacturer website (Qualcomm, Mediatek or Exynos). For example, let’s take snapdragon 845. The base frequencies of this chip are 4×2.5 GHz Kryo 385 Gold & 4×1.6 GHz Kryo 385 Silver. So four 2.5Ghz high-performance cores and four 1.6Ghz low-performance cores.

I am going to compare all the famous smartphones processor frequencies with the base frequency.

SmartphoneSamsung S9Samsung Note 9Pixel 3OnePlus 6TLG v40Razer Phone 2
Processor ModelSD 845SD 845SD 845SD 845SD 845SD 845
Frequency or Clock Speed4×2.8 GHz Kryo 385 Gold & 4×1.7 GHz Kryo 385 Silver4×2.8 GHz Kryo 385 Gold & 4×1.7 GHz Kryo 385 Silver4×2.5 GHz Kryo 385 Gold & 4×1.6 GHz Kryo 385 Silver4×2.8 GHz Kryo 385 Gold & 4×1.7 GHz Kryo 385 Silver4×2.8 GHz Kryo 385 Gold & 4×1.7 GHz Kryo 385 Silver4×2.8 GHz Kryo 385 Gold & 4×1.7 GHz Kryo 385 Silver
Frequency Comparison of mobile processors

As you can see, only Google Pixel 3 and 3 XL have default clock speeds of 2.5 GHz for high power cores and 1.6 GHz for low power cores. Whereas every other smartphone has higher frequencies of 2.8 GHz for high power cores and 1.7GHz frequency for low power cores.

It would be normal to assume at this point that all of the smartphones listed in the table would have higher performance than Google Pixel 3 and 3 XL. The smartphones with similar frequencies of processor should have the same performance, Right?

Let me show the scores of GeekBench 5 for all of these smartphones, so you can check it yourself.

GeekBench 5Single CoreMulti-Core
Google Pixel 34761872
Google Pixel 3 XL4911999
Samsung S94691955
Samsung Note 96081934
OnePlus 65022220
OnePlus 6T5012248
LG G74801953
LG v404291868
Razer Phone 25032187
Source: Geekbench

The performance of the smartphones having the same processor chip as well as the same frequency as the processor is not the same.

This is just one proof that just looking at the specifications do not tell you the whole story of performance.

Cooling or Thermal Solution used in the smartphone:

The processor speed does not matter if the processor can not keep up the performance for a long time. This happens because of the heat produced by the processor when it is performing demanding tasks. The processor chips are designed to not operate at high temperatures, so the processor reduces its performance by 33% in most cases to let the device cool down.

But if a smartphone has a good cooling solution and it doesn’t get hot even in demanding tasks, the processor would not reduce its performance in this scenario.

If a smartphone can not maintain its temperatures at 100% performance of the processor, the smartphone processor would only go to 100% in pulses and would throttle down to 60-70% to reduce smartphone temperature.

Due to this problem, smartphones like Google Pixel 3, LG V40 and Samsung S9 do not have high multi-core scores like the rest of the smartphones in the table.

So the thing is, the smartphones given in the table have different sizes. The different size of the smartphone means they have different cooling solutions. Normally, the bigger the smartphone is, the easy it is for a smartphone to dissipate heat because of having more space inside the smartphone.

The other factor is the cooling solution. Even bigger smartphones that have a bad cooling solution can be outperformed by smaller smartphones having a good cooling or thermal solution.

The gaming smartphones like Razer Phone and Asus ROG have one of the best cooling solutions.

The last point in throttling is for how long a processor can maintain its peak performance. This totally depends on the thermal or cooling solution of the smartphone.

Tests like GFX Bench (ES Open GL 3.1) are able to put 100% load on a smartphone for like 30 cycles. After 18 cycles, most of the smartphones drop their performance by at least 33%. But the gaming smartphones, they do not drop their performance as much.

OnePlus 6 is impressive as it does not throttle as much as the rest of the smartphones except Razer Phone 2.

In the case of LG V40 and Pixel 3 and Samsung S9, they feel soft to the touch even at max load. This is because the processors in these smartphones are the same as the others but they can not keep up the peak performance for long.

This happens because the cooling solution in these smartphones do not allow the processor to maintain the peak performance for long. This explains why their benchmarks scores, as well as temperatures, are low.

(Room Temp=21.1 °C)
Max TempAverage Temp
Samsung S935.4 °C 33.8 °C 
Samsung Note 9 45.9 °C 41.9 °C 
Pixel 335.4 °C 34.1 °C 
Pixel 3 XL42 °C 39 °C 
OnePlus 645.3 °C 40.2 °C 
OnePlus 6T48.6 °C 44.5 °C 
LG G734.8 °C 33.5 °C 
LG V4033.4 °C 30.9 °C 
Razer Phone 240.7 °C 39.5 °C 
Source: Notebookcheck

It is important to point out that only the Razer Phone 2 was able to maintain temperatures around 40 °C which is rather impressive.

I am not pointing out the Samsung S9, LG V40 or Pixel 3 because these devices do not have higher scores in Geekbench 5 which means they did not maintain their peak performance for very long. This is why these devices do not have high performance or high temperatures. 

Smartphone User Interface or Android Skin:

The different Android skins that different smartphone manufacturer uses to make their smartphone unique is another cause of the processor performance not consistent in all the Android Smartphones.

Apple iPhones do not have this problem because of how well the software and hardware are integrated with each other. Apple iPhone processors only carry limited instructions for their echo system which is quite different from Android Smartphone processors.

Smartphone processor-Whaddafudge

Android Smartphone Processors have to include instruction sets for all of the different manufacturers From Google Pixel to Xiaomi Smartphones. Due to having more instructions in an Android Processor, it hinders the processor’s capability to perform at its peak performance for every Android Skin.

So it is up to smartphone manufacturers to optimize their Android skins as much as possible.

That is why Android Smartphones having the same processor do not have the same performance.

Manufacturer’s Role

All of this burden of optimizing the hardware with software falls on the manufacturer of the smartphone.

To be honest, Manufacturers can just use the Vanilla Android Skin or Stock Android in their smartphones which would allow them to minimize the cost and effort of optimizing their skin for every smartphone. It would be Google’s responsibility to optimize the UI (User Interface) for each smartphone.

Even now, the most optimized software is of Google Pixel smartphones even though their specifications are on the lowest end compared to other Flagship devices.

I have a Google Pixel 2016, it still does not lag even though it’s internal memory is 90% full. While on the other side, I have an LG G6 which lags a lot even though it’s memory is 60% full. It is because LG UI is badly optimized for the hardware.

Comparing the LG G6 and Google Pixel 2016, the two smartphones having the same specifications. It is proof that software plays a very important role in the performance of the smartphone.

Since the optimization of the software with hardware depends solely on the smartphone manufacturer, it is the manufacturer’s responsibility to pay attention to the integration of software with hardware.

How to Check Smartphone Optimization

So next time you want to check if a manufacturer’s optimization of their hardware with software is good or not. Just check the fluidity or smoothness of the smartphone in day to day usage.

Some tests you could use to determine this are:

  1. Running Google Maps
  2. Checking the time to start the smartphone
  3. Running SnapChat to determine the amount of lag (which lags on almost every smartphone)
  4. Setting the animation speed to 0.5x in the developer’s settings
  5. Filling the storage 95% and then checking the performance.

Recommended Sources to check CPU’s Performance

I have compiled a list of websites that I use to check a smartphone processor’s performance and you should too.

Here is the list:

  1. Geekbench
  2. Notebook check reviews
  3. Check the battery life section and look at the graph for sustained CPU performance.
  4. Android Benchmarks
  5. UL Benchmarks


Smartphones Manufacturers are increasing day by day and along with it variety of smartphones is also increasing. This creates complexities for smartphone manufacturers as well as Google to make Android optimized for every smartphone.

It is our responsibility to get to know the factors affecting the performance of a smartphone. While it is a difficult task for newbie’s but once you understand how to read specifications and benchmarks and to translate them into your day to day usage, it is a piece of cake.

In short,Check the following things in a smartphone:

  1. Check the smartphone processor frequency or clock speed.
  2. Check the max and average temperatures of the smartphone.
  3. Check the processor sustained peak performance from GFX bench 3.1.
  4. Check the Android UI optimization for the hardware.

Anas Abdullah

Tech Enthusiast, Content Writer, Part-time Gamer.

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