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 64 bit apps wont start at all (but an emulator should come in Windows in 2021).
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 Samsung in the modern 7 nm process (7LPP). Therefore, laptops using the Snapdragon 8cx can be passively cooled (no fan) and should not throttle under constant load.
| Codename | Cortex-A76 / A55 (Kryo 495) | ||||||||||||
| Series | Qualcomm Snapdragon | ||||||||||||
Series: Snapdragon 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 | ||||||||||||
| Architecture | ARM | ||||||||||||
| Announcement Date | 12/06/2018 | ||||||||||||
| Product Link (external) | www.qualcomm.com | ||||||||||||
- Average benchmark values for this graphics card
Huawei MateBook E Go 2023: Qualcomm Adreno 690, 12.35", 0.7 kg
External Review » Huawei MateBook E Go 2023
Lenovo IdeaPad Flex 14-82AK0002US with 5G: Qualcomm Adreno 680, 14.00", 1.3 kg
External Review » Lenovo Flex 5G 14-82AK0002US
Lenovo Yoga C 5G-88YGC801370: Qualcomm Adreno 680, 14.00", 1.3 kg
External Review » Lenovo Yoga C 5G-88YGC801370
Samsung Galaxy Book S: Qualcomm Adreno 680, 13.30", 1 kg
External Review » Samsung Galaxy Book S
» Samsung's Galaxy Book S is a very good mobile companion with integrated LTE
» Samsung Galaxy Book S Hands-on: Extremely light and long battery runtime
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