The Microsoft SQ1 is a ARM based SoC for Windows tablets (Surface Pro X). It is based on the Snapdragon 8cx but with higher clocked CPU and GPU cores. The CPU cores clock with up to 3 GHz. The 4 Kryo 495 Gold cores are based on the ARM Cortex-A76 architecture (for performance) and clocked at up to 3 GHz (2.84 GHz for the 8cx) 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 (unverified) under load. 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 685 graphics card is a higher clocked version of the Adreno 680 in the Snapdragon 8cx. Microsoft claims 2 TFlops theoretical performance compared to the 1.8 for the Adreno 680 (+11%).
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.
|Codename||Cortex-A76 / A55 (Kryo 495)|
|Series: Snapdragon Cortex-A76 / A55 (Kryo 495)|
|Clock Rate||3000 MHz|
|Level 3 Cache||2 MB|
|Number of Cores / Threads||8 / 8|
|Manufacturing Technology||7 nm|
|Features||X24 LTE Modem, Adreno 685 GPU|
|GPU||Qualcomm Adreno 685|
|64 Bit||64 Bit support|
|Product Link (external)||Qualcomm Snapdragon SQ1|