Are Single Core Processors Still Available?

Single core processors are still available, but they are relatively rare in the consumer market. Most modern processors, whether for desktops, laptops, or mobile devices, are multi-core to provide better performance and efficiency for multitasking and demanding applications. However, single-core processors may still be found in some low-power devices, embedded systems, and specific applications where high performance is not a priority, such as certain microcontrollers or legacy systems.

Where to Find Single Core Processors

If you are looking to purchase a single-core processor for a specific use case, there are still options available. For example, Intel Pentium 1 to 4 series are single-core processors. For other options, you can visit the Intel or AMD websites for detailed information.

For those specifically interested in single-core processors in the consumer space, it is generally more challenging to find such products. The current base Intel Celeron is a dual-core, and the base AMD Athlon is a quad-core. Buying a single-core computer will most likely involve purchasing a second-hand device or finding discontinued parts for compatibility.

If you really need a single-core processor, your best bet would be to buy a modern CPU and disable the cores in the BIOS. This approach ensures that you have the functionality you need while potentially saving costs and energy.

Why Would You Need a Single Core Computer?

The use of single-core processors can vary widely depending on the application. In the consumer market, the demand for single-core processors is low due to the high performance requirements of modern software. However, in specific industrial, automotive, and embedded systems, a single core is still viable and even preferred.

The Dominance of Single Core Processors - Embedded Systems

Although single-core processors are increasingly rare in the consumer market, they are far from extinct. In the realm of embedded systems, single-core processors are the most prevalent. For example, in the automotive industry, an average car might contain several dozen or even over 100 processors, with some high-end models having nearly a 100 million lines of code.

Microcontrollers, the core of many embedded systems, are the primary drivers of single-core processor usage. The most significant market for microcontrollers is in devices like microwave ovens, intelligent thermostats, and smart light bulbs. These devices, although they play a critical role in our daily lives, are often used in substantial numbers—about 20 billion microcontrollers are sold each year.

This sector includes new architectures like ARM, which is designed into parts made by several manufacturers. Companies such as Microchip continue to develop new microcontrollers, including 8-bit, 16-bit, and 32-bit designs. The ATTINY20, a popular microcontroller, is a single-core device approximately one-sixteenth of an inch in size. It is used in a wide range of applications, from basic home appliances to complex automotive electronics.

In comparison, the ATTINY20 is a modern single-core microcontroller, whereas the UNIVAC I is a historical reference to the first commercial computer, demonstrating the stark evolution in technology over the years. As of now, Digi-Key alone has almost 70,000 listings for microcontrollers, with only about 19 of them being dual-core or having more than two cores, showcasing the dominance of single-core devices in the market.

Therefore, while single-core processors are not mainstream in consumer electronics, they continue to play a vital role in specialized applications and embedded systems, ensuring their relevance and utility remain strong.