Qualcomm Snapdragon 8cx Gen 3 is a high performance Arm SoC designed to compete with Apple M3, with Windows 11 thin and light notebooks and Chromebooks being its main target devices. Microsoft pins a lot of hope in chips such as the Snapdragon 8cx series as they offer comparable performance and battery life to the current crop of M3 MacBooks. A lot of water has flown under the bridge since Windows RT, and the latest crop of Windows 11 for Arm has a much wider PC application support base thanks to official translation layers by Microsoft. CPUID has an Arm64 version of the popular CPU-Z utility, which correctly detects all the specs of the Snapdragon 8cx, but more importantly, has a Bench tab that can test the single- and multithreaded performance of the CPU.

A Chinese tech enthusiast wasted no time in putting the Snapdragon 8cx through this CPU-Z internal benchmark, and found surprisingly good performance numbers. The single-threaded bench, which loads one of chip's four Arm Cortex-X1C P-cores, registers a score of 543.7 points. This is roughly comparable to that of the AMD "Zen 2" or Intel "Comet Lake" x86-64 core. The multithreaded test, which saturates all four P-cores, and all four Cortex-A78C E-cores, springs up 3479.7 points, which again compares to entry/mainstream x86-64 processors from AMD or Intel. Not impressed? How about the fact that the Snapdragon 8cx Gen 3 is a 7 W chip that idles under 2 W for the most part, and can make do with passive cooling, posting scores comparable to 35 W x86 chips that need active cooling?

In the past few years, the Windows-on-Arm (WoA) market has gotten some momentum has with companies trying to develop their WoA PCs, primarily laptops. One example of that is Microsoft. The company has launched a Surface notebook powered by a custom chip from Snapdragon, called Surface Pro X. This device is being powered by the Snapdragon SQ2 processor. However, what seemed to be missing for a while was the lack of support from the Arm itself for this type of market. That is what the company decided to change and make a brand new processor IP dedicated to "on-the-go" devices as they call it, translating into laptops.

The Cortex-A78C is a new design direction which Arm thinks is a good way for laptops, to get some more serious work done. Unlike the regular Cortex-A78 which is a heterogeneous design of big and little cores (Arm's famous big.LITTLE architecture), the new Cortex-A78C revision aims to change that. The "C" version of the processor is actually a homogeneous structure made up of all the big cores. Where you would typically use four big and four little cores for a design, Arm has decided to go all big with this design. For multithreaded purposes, this is the right decision to boost performance. The level three (L3) cache has seen a boost as well, translating to 8 MB of L3$ found on the die. We are eagerly awaiting to see the first designs based on this configuration and see how it performs.