Qualcomm Snapdragon 8cx

The Qualcomm Snapdragon 8cx Compute Platform (or SD8cx) is a ARM based SoC for Windows laptops. It integrates a similar CPU part as the Snapdragon 855 (same cores but without the Prime Core feature) and is manufactured in 7nm at TSMC. The 4 Kryo 495 Gold cores are based on the ARM Cortex-A76 architecture (for performance) and clocked at 2.84 GHz under load (no single core Turbo). The 4 Kryo 495 Silver cores are small ARM Cortex-A55 cores for power efficiency and clocked at 1.9 GHz under load. According to Qualcomm, the clock speed should not be reduced under constant load with typical (fanless) cooling. The integrated X24 LTE modem supports up to 2 Gbps download speeds. Furthermore, the SoC integrates ac-Wifi and a dual-channel 32-bit 1866 MHz LPDDR4x memory controller.

The processor performance should be similar to a Intel Core i5 8th gen U-series (e.g. i5-8250U) according to Qualcomm. However, this is only the case for native ARM64 compiled Windows apps which are not that many (in mid 2019). 32 bit applications and games for AMD/Intel run in a rather slow emulation and 65 bit apps wont start at all.

The integrated Adreno 680 graphics card is a beefier version of the Adreno 640 in the Snapdragon 855 and should be twice as fast as the old Adreno 630 (in Windows laptops) and offer a 60% higher efficiency.

The chip is very power efficient as its produced at TSMC in the modern 7 process. Therefore, laptops using the Snapdragon 8cx can be passively cooled (no fan) and should not throttle under constant load.

Qualcomm Snapdragon 8cx (CPU-Z)
Qualcomm Snapdragon 8cx (Compute eXtreme) SoC
Manufacturer ARM (Qualcomm)
Series: Snapdragon Cortex-A76 / A55 (Kryo 495)
Microsoft SQ1 3000 MHz8 / 82 MB
Qualcomm Snapdragon 8cx Gen 2 3000 MHz8 / 82 MB
Qualcomm Snapdragon 8cx 2840 MHz8 / 82 MB
Codename Cortex-A76 / A55 (Kryo 495)
Clock Rate 2840 MHz
Level 3 Cache 2 MB
Number of Cores / Threads 8 / 8
Power Consumption (TDP = Thermal Design Power) 7 Watt
Manufacturing Technology 7 nm
Features X24 LTE Modem, Adreno 680 GPU
GPU Qualcomm Adreno 680
64 Bit 64 Bit support
Announcement Date 12/06/2018

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