TLDR: The ARM Cortex-X1 is a powerful microprocessor designed for high-performance devices like smartphones and tablets.

The ARM Cortex-X1 is a central processing unit (CPU) developed by ARM Holdings. It was launched in 2020 and is part of ARM's Cortex-X Custom (CXC) program. The Cortex-X1 is designed for maximum performance and is based on the ARM Cortex-A78 architecture.

In terms of performance, the Cortex-X1 can reach clock speeds of up to 3.0 GHz in phones and 3.3 GHz in tablets and laptops. It has a 40-bit address width and features a 128 KiB L1 cache and a 512-1024 KiB L2 cache per core. It also supports ARM's DynamIQ technology, which allows it to be used alongside other ARM cores for a balanced performance.

Compared to its predecessor, the Cortex-A77, the Cortex-X1 offers significant improvements in both integer and machine learning performance. ARM claims that the Cortex-X1 is 30% faster in integer performance and 100% faster in machine learning performance.

The Cortex-X1 is available as a semiconductor intellectual property (SIP) core to ARM's partners in the Cortex-X Custom program. It can be integrated with other SIP cores, such as graphics processing units (GPUs) and display controllers, to create a system on a chip (SoC).

Some of the devices that use the Cortex-X1 include the Samsung Exynos 2100, Qualcomm Snapdragon 888(+), and Google Tensor.

In summary, the ARM Cortex-X1 is a high-performance microprocessor designed for smartphones, tablets, and laptops. It offers significant improvements in performance compared to its predecessor and can be integrated with other cores to create powerful SoCs.

Related Links:

• ARM Cortex-X1 on Wikipedia
• ARM Cortex-A78 on Wikipedia
• Comparison of ARMv8-A cores on Wikipedia