Today we're looking at the purpose of the CPU, specifically the following parts from the OCR Computer Science Specification (<a href="https://www.ocr.org.uk/images/225975-specification-accredited-gcse-computer-science-j276.pdf">https://www.ocr.org.uk/images/225975-specification-accredited-gcse-computer-science-j276.pdf</a>)
the purpose of the CPU&nbsp;
Von Neumann architecture:
<ul>
 <li>MAR (Memory Address Register)</li>
 <li>MDR (Memory Data Register)&nbsp;</li>
 <li>Program Counter&nbsp;</li>
 <li>Accumulator&nbsp;</li>
</ul>
common CPU components and their function:
<ul>
 <li>ALU (Arithmetic Logic Unit)</li>
 <li>CU (Control Unit)</li>
 <li>Cache</li>
</ul>
the function of the CPU as fetch and execute instructions stored in memory&nbsp;
clock speed

1.1.2 Factors that affect the performance of the CPU

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