A CPU or a processor is a term many of you have already heard of since it’s the “soul” of any phone, PC, laptop, etc.
On the other hand, APU might be a term you are not so familiar with, even though APUs and CPUs are pretty similar. But, still, they are different.
So, what is the difference between a CPU and an APU? We’ve gathered definitions, pros, cons, benefits, and some other information to help you understand the difference.
Let’s explore those differences in this guide!
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Central Processing Unit – CPU
Every software or app you utilize on your computer is referred to as a computer program. This program is composed of numerous lines of programming language. This language is essentially a group of directions delivered to the CPU.
The CPU’s role is to process those computer program instructions to operate said programs. The instructions can include anything from logic to arithmetic operations.
But that’s not all!
The CPU is also the main meeting point for any piece of hardware linked to the system. This includes the system memory (RAM), hard drives, SSDs, and even the graphics card.
When a program needs access to the GPU for rendering, it must request that through the CPU.
Naturally, the way a CPU operates is so much more complicated than our explanation above, but there’s no reason to delve that deep into the topic, so we’ll leave the rest for the experts.
There are a few things that dictate the speed, proficiency, and success of a central processing unit.
The clock speed is one of the main factors that affect how fast a CPU can process instructions. Today’s mid and high-end processors have boosted clocks between 4 and 5.5 gigahertz (GHz).
Here’s a video of der8auer overclocking and AMD CPU up to 8.1 GHz:
Cores and Threads
However, clock rate alone is not enough to manage present-day applications and video games. That is why current CPUs possess multiple cores that enable them to simultaneously perform various tasks/instructions.
Every single one of these cores has its own clock speed, which can also be overclocked. This is what PC enthusiasts refer to as “all-core overclocking.”
To make a CPU work better, real cores can have virtual cores, which is called hyper-threading (Intel) or multi-threading.
For example, the Ryzen 7 5700X has 8 cores and, with multi-threading, a total of 16 logical cores. Usually referred to as threads, these cores allow the CPU to simultaneously handle 16 tasks, boosting work productivity.
Modern consumer processors have up to 32 threads, while enterprise-grade CPUs have up to 64 cores and 128 threads.
Although, not all physical cores have threads. Recent examples are the SKUs from Intel’s Alder Lake lineup.
Currently, the leading CPU brands are AMD and Intel.
CPUs also have an integrated graphics card (iGPU). This is usually a low-powered GPU used for most basic tasks. They’re considerably slower than high-end dedicated GPUs.
However, not every CPU possesses an iGPU. For instance, AMD’s Ryzen (most) SKUs lack a built-in graphics card within the processor, whereas the majority of Intel chips do.
Accelerated Processing Unit – APU
An APU is a CPU and a GPU on a single die while sharing the same power, cache, memory, etc. Its role is basically identical to any other CPU.
Nonetheless, not all central processing units (CPUs) including an integrated graphics processing unit (iGPU) can be classified as accelerated processing units (APUs). To meet the criteria of the Heterogeneous System Architecture (HAS) Foundation established by AMD, a CPU must fulfill certain conditions. As Intel did not originate this foundation, they do not produce APUs.
So, is there any real difference between an Intel CPU with an iGPU and an AMD APU?
Yes, there is! Because of those strict regulations by the HAS Foundation, APUs have a much more powerful GPU embedded into the CPU die. But, because the GPU takes such a large part of the die, the CPU is usually slower than its non-GPU version.
Intel’s UHD graphics, for example, are considerably slower because they only take a small part of the CPU die.
Here’s a video comparing Intel’s UHD 750 iGPU and AMD’s Vega 8 in the Ryzen 3 3200G:
It’s apparent in the video that APUs have GPUs that are nearly twice as fast as Intel’s iGPU.
What Should You Get – CPU or APU?
With a better understanding of the differences between CPUs and APUs, we can now talk about the better option for you.
Of course, all of this depends on your use case, but here are a few suggestions:
- An APU is a good choice if you need a faster GPU for gaming or other GPU-related tasks but don’t have a dedicated GPU.
- An APU is also a good choice if you do both CPU and GPU demanding tasks.
- A CPU is a great choice (with or without an iGPU) if you have a dedicated GPU.
- A CPU with an iGPU is a solid option if you don’t have a dedicated GPU and if you don’t plan on competitive or high-end gaming.
We hope this article has cleared some things about CPUs and APUs and that you will be able to pick the correct type of processor for your computer.