Systems on a Chip (SOCs) as Fast As Possible
**The Evolution of Systems on a Chip (SoC): How Smartphones Have Grown Over Decades**
As we sit down to review this episode of "Fast as Possible," I noticed the folder name for the project and asked John, "What is a system on a chip?" He replied with a smile, "You're in luck—it's all explained right here in the script we're about to go over. Here we go!"
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**Introduction: The Era of Mobile Computing**
We now live in an era where many of us expect our smartphones—small devices we carry around in our pockets—to perform most of the tasks that a personal computer (PC) could do just a few decades ago. For instance, consider the Samsung Galaxy, which even offers a setting for multiamp anti-aliasing to make mobile games look nicer on its screen. But here's the question: How have smartphones evolved so quickly from being simple novelties that couldn’t even handle copy-paste functions to becoming all-in-one devices capable of handling complex tasks in just over a decade?
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**What Is a System on a Chip (SoC)?**
When I asked John about SoCs, he clarified that when he refers to a "system," he's talking about the essential components that make a phone or tablet function—such as processors, memory, storage, and input-output (IO) controllers. If you've ever built or upgraded a desktop PC, you know that these functions are typically handled by separate components installed on the motherboard. However, an SoC integrates all of these functions into a single piece of silicon, often the same size or even smaller than a conventional CPU.
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**The Power Efficiency Challenge**
One might wonder: How can so many components fit onto just one chip? The answer lies in power efficiency. Since phones and tablets are mobile devices that rely on batteries, their internal components must consume less power and generate less heat. Imagine a phone with only 10 minutes of battery life and a hot stove-like surface—it wouldn’t be practical. Therefore, manufacturers have focused on creating energy-efficient components with fewer transistors, making them physically smaller.
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**Performance Despite Limitations**
While components on an SoC may not match the power of their desktop PC counterparts, they are far from inferior. Many mid-range and high-end SoCs deliver smooth performance. This is partly due to the use of ARM architecture in their CPUs, which runs a smaller, simpler instruction set. This makes processing more efficient, even though it might be less versatile than other architectures.
Moreover, mobile apps and operating systems like iOS and Android are designed specifically for these CPUs. As a result, your phone doesn’t feel sluggish, even if its SoC is several times less powerful than a desktop CPU. For example, the new Apple A10 chip inside the iPhone 7 was the first quad-core chip in an iPhone, while Android devices had been using eight-core chips for years.
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**The Trend Toward Integration: From Mobile to Desktop**
This integration concept isn’t limited to mobile devices; it’s also finding its way into desktops. While PCs aren't yet packing everything—like RAM and LTE communication logic—onto a single die or package, the trend toward consolidation has been evident for decades. Intel was one of the first companies to move components like the cache from external chips directly onto the CPU, while AMD recently integrated memory controllers into the CPU die (previously a separate chip called the Northbridge).
At first glance, this might seem like unnecessary complexity. However, the reduction in latency and power consumption from having these components closer together more than compensates for any wasted die space or additional costs.
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**Onboard Graphics: The Next Frontier**
This trend extends to onboard graphics as well. We’re seeing advancements in integrated GPUs (graphics processing units) that provide solutions for light to moderate gaming. Intel’s Iris Pro and AMD’s Apu series are examples of how on-chip graphics can deliver decent performance, even if they don’t match the power of a full-fat GPU.
With the rapid pace of technological advancement, it might not be too far off before we see entire systems the size of a postage stamp—or at least CPUs that can handle complex tasks in a compact form. Speaking of postage stamps—thank you, internet! We hardly ever need them anymore.
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**FreshBooks: Streamlining Accounting for the Self-Employed**
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**Try FreshBooks for Free**
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**Closing Thoughts: Stay Connected with Tech Quickie**
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