Snapdragon 8cx Gen 4 Spec Surfaces, Promises Powerful CPUs, External GPU Support

At the end of 2021, Qualcomm unveiled the first 5nm chipset for Windows on ARM devices, the Snapdragon 8cx Gen 3. Because it used an ARM designed core, its performance is not much different from its sibling used in Android. But soon, Qualcomm’s acquisition of Nuvia will pay off with the 8cx Gen 4.

Previous rumors suggest that the company is working on a 12-core chip. According to Kuba Wojciechowski, they are split between 8 performance (~3.4 GHz) cores and 4 efficiency (~2.5 GHz) cores. They will be based on Nuvia’s Phoenix design and will use the “Oryon” marketing name (instead of “Kryo” like the current Android chips).

Snapdragon 8cx Gen 4 Spec Surfaces, Promises Powerful CPUs, External GPU Support

The Snapdragon 8cx Gen 4 will be a formidable beast. Wojciechowski reported that there will be 12MB of shared L2 cache per block of the four cores, as well as 8MB of L3 cache, 12MB of system-level cache, and an additional 4MB for graphics.

Up to 64 GB of LPDDR5X RAM is supported in an 8-channel configuration running at 4.2 GHz. Nuvia originally designed (and still does) chips for servers, and they usually have a lot of RAM.

The chipset has an Adreno 740 which is the same GPU as the 8th Gen 2. However, external GPUs are supported with 8 lanes of PCIe 4.0 (for reference, v4.0 is twice as fast as PCIe 3.0).

Two-lane UFS 4.0 storage (up to 1TB) is also supported as an affordable option, although there are additional four PCIe 4.0 lanes for NVMe drives (also configurable as two 2x channels). The chip also has additional PCIe 3.0 lanes for peripherals like Wi-Fi cards or modems. The 8cx Gen 4 doesn’t have 5G built in (unlike Android).

The wired connection option seems great. The chip supports two USB 3 10Gbps ports and three USB 4 (Thunderbolt 4) ports with DisplayPort 1.4a. The latter will allow you to drive a triple monitor setup, 5K+4K+4K.

A few more tips. The Adreno 740 can be used for machine learning tasks as well as an upgraded Hexagon Tensor processor capable of delivering up to 45 TOPS in INT8. The tricky part is getting support from Windows, but Qualcomm is working with Microsoft and Adobe to figure it out.

Snapdragon 8cx Gen 4 Spec Surfaces, Promises Powerful CPUs, External GPU Support

The chipset will obviously support video decoding up to 4K/120 fps and encoding up to 4K/60 fps from a variety of codecs, including AV1 (which Apple’s M2 chip doesn’t have).

The Snapdragon 8cx Gen 4 is due out in 2024 and should power Windows laptops and tablets (and possibly mini PCs). Qualcomm has promised to release more official information about the new chips later this year.

source | Through

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