What does GHz mean on a processor?

GHz, which means gigahertz, is the measure of the number of cycles per second that the central processing unit (CPU or processor) can perform. One gigahertz is equivalent to one billion cycles per second, and it is generally accepted that the more GHz the processor has, the faster the computer will be. However, thanks to years of efficiency and tinkering under the guidance of processor makers like Intel and AMD, they can now achieve significantly faster speeds at lower GHz than previous generations.

AMD was the first to break the GHz barrier with its Athlon processor, released in 1999 at a price of $1,299. Its launch allowed Intel to quickly release the $990 Pentium III, but this quick move meant that supply was hard to come by. AMD then won awards at different outlets that year, which started the rivalry to be at the center of your PC and the GHz race began to evolve into the multi-GHz we see today.

Intel currently holds the highest GHz reached by consumer hardware with the i9 14900KS which can normally hit 6.2 GHz, but its slightly weaker sibling, the 6 GHz 14900KF, has been pushed to 9.13 GHz in 2025. Likewise, the 14900KS proves that more GHz no longer means a better processor, in the grand scheme of things. On Geekbench, Intel’s latest desktop chip, the 270K Plus, achieves a higher multi-core and single-core score than anything before it, with 3.7 GHz.

The overall processor power now mainly depends on the number of cores present on the chip. Each core is rated at the advertised speed, so when AMD launched its powerful workstation processor, the Ryzen Threadripper 9980X, it sports 64 cores at 3.2 GHz per core. When used in multi-core, it dominates the Geekbench list by a wide margin, but it’s easily beaten by the faster clock speed and lower core count Ryzen 9 9950X3D2, at 4.3 GHz on 18 cores, in single-core performance.

Comparing architectures, AMD and Intel are x86, the traditional PC option, while Apple and Qualcomm operate in the ARM space. ARM is typically used in phones or other less powerful devices. However, as development and improvements continued, these chips started to achieve crazy performance, especially in GHz. Apple hit 4.6GHz with its Apple M5 Max chips, and the Ultra has the same, with just double the number of cores, from 32 or 40 to 64 or 80.