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Learn: Comparing CPU Specs for Real Scenarios
OCR GCSE J277 Computer Science specification
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Welcome!Hi! Today we'll focus on comparing CPU specifications for real-world scenarios. I've tailored this lesson to help you strengthen your understanding of core count, clock speed, cache size, and registers. Let's get started!
What is a CPU?The CPU (Central Processing Unit) is the brain of the computer. It processes instructions, performs calculations, and manages data. Choosing the right CPU for a specific scenario is important because it affects how fast and efficiently a computer can work.
Core CountModern CPUs often have multiple cores. A core is a processing unit that can handle its own tasks. More cores allow a CPU to process multiple tasks at the same time, which is useful for multitasking or running advanced applications like video editing software.
Why does having more cores improve CPU performance?
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Clock SpeedThe clock speed of a CPU is measured in gigahertz (GHz) and represents how many cycles per second the CPU can process. Higher clock speeds mean the CPU can process instructions faster, but it also generates more heat and may need better cooling.
What does clock speed measure?
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Cache SizeThe cache is a small, fast memory located inside or very close to the CPU. It stores frequently accessed data to reduce the time the CPU spends fetching it from RAM. A larger cache can improve performance but also increases the cost of the CPU.
The {{blank0}} is a small, fast memory that stores frequently accessed data close to the CPU.
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Registers: Data vs AddressRegisters are tiny, very fast storage areas inside the CPU. The Memory Address Register (MAR) stores the address of the next instruction, while the Memory Data Register (MDR) stores the actual data being processed.
The {{blank0}} register stores the {{blank1}} of the next instruction.
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Review Time!Great work! You've learned about core count, clock speed, cache size, and registers. Let's test your understanding with a few questions.
Which part of the CPU holds the address of the next instruction?
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Which of the following factors affect CPU performance? (Select all that apply)
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Match the items on the left with their correct pairs on the right
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A CPU with more {{blank0}} can perform multiple tasks {{blank1}}.
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