Socket 478 CPUs were used in a connector created by Intel in 2001 for Pentium 4 and Celeron CPUs. They have processing speeds between 1.4 GHz and 3.46 GHz and an FSB between 400 MHz and 1.066 MHz. They were phased out in 2008 in favor of socket 775 CPUs. The socket is designed to work with CPUs of a certain speed and the pin spacing is half that of socket 423. The market was limited to Pentium 4 and Celeron CPUs. The FSB is one of the biggest determining factors in how fast the CPU can run. Socket 478 CPUs were among the last to use PGA, while the 775 socket used LGA.
Socket 478 central processing units (CPUs) are all CPU units used in a socket 478 CPU connector. These connectors establish a connection between some CPUs and the motherboard, allowing the CPU to work on necessary functions. Created by Intel® in 2001, the 478 connector is widely used in two CPU platforms: Pentium 4® and Celeron®. Socket 478 CPU units have processing speeds between 1.4 gigahertz (GHz) and 3.46 GHz, and the connector front side bus (FSB) is between 400 megahertz (MHz) and 1.066 MHz. These CPUs were phased out in 2008 in favor of socket 775 CPUs.
All CPUs are made to work with a certain type of socket. The socket is designed to work with CPUs of a certain speed, measured in MHz or GHz, and other CPUs will not work and will not fit properly in the socket. Intel® made socket 478 to replace socket 423. The biggest difference, besides having a higher memory threshold, is that the pin spacing, where the CPU pins fit, is half that of the socket 423. This allows the socket and CPU to be smaller while having more processing power, resulting in a CPU that is 1.38 inches (3.5 centimeters) square.
Most sockets and their CPU counterparts are only made for one or two types of CPUs, although they sometimes accommodate more. The socket 478 CPU market was limited to two CPUs, the Pentium 4® and the Celeron®, the former used on the higher end and the latter used for lower processing requirements and cheaper computers. The Celeron® CPU model worked towards the lower socket 478 threshold of around 1.5 GHz to 2.5 GHz, while the Pentium 4® was around 2.4 GHz to 3.4 GHz.
The Socket 478 CPU’s FSB clocked between 400 MHz and 1.066 MHz. The FSB is one of the biggest determining factors in how fast the CPU can run, because the FSB is the unit that connects the CPU to memory principal. A higher FSB means that more calculations and functions can be completed in one second. Just as with processing speed, Celeron® is at the lower end of this spectrum, while Pentium 4® is at the higher end.
Socket 478 CPUs were among the last to use the pin grid array (PGA); the 775 socket which replaced the 478 used a new array known as the Land Grid Array (LGA). This type of arrangement uses flat connectors instead of pins and pinholes. The LGA arrangement creates less heat and allows for better integration than socket 478 PGA.
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