Qualcomm Snapdragon 636 vs Qualcomm Snapdragon 665 vs Qualcomm Snapdragon 6s 4G Gen 1

Qualcomm Snapdragon 636

The Qualcomm Snapdragon 636 (SDM636) is a mid-range octa-core SoC with eight custom Kryo 260 cores at up to 1.8 GHz, an Adreno 509 GPU, a LPDDR4-2666 memory controller (1333 MHz) and a X12 LTE (Cat 12/13, 300 Mbps down, 150 Mbps up) modem. Furthermore, the chip supports 802.11ac WiFi and Bluetooth 5.0. It is manufactured in 14nm FinFet. Qualcomm states a 40% faster performance compared to the old Snapdragon 630 (8x ARM Cortex-A53).

Qualcomm Snapdragon 665

The Qualcomm Snapdragon 665 (SM6125) is a fast mid-range ARM-based SoC largely found on Android tablets and smartphones. It features 8 Kryo 260 cores (custom design, 64-Bit capable) that are divided in two clusters. A fast cluster of four cores with up to 2 GHz (Kryo 260 Gold - Cortex-A73 derivate) and a power saving efficiency cluster with up to 1.8 GHz (Kryo 260 Silver - Cortex A53 derivate). Both clusters can also be used together.

In addition to the 8 CPU cores, the SoC integrates a mid range Adreno 610 GPU with a LPDDR4 memory controller (dual-channel)  and supports Wi-Fi (802.11ac + MIMO, max. 867 Mbps), Bluetooth 5, and LTE (X12 LTE modem with up to 600 Mbps download and 150 Mbps upload).

Power Consumption

Thanks to the new 11 nm LPP process, the energy efficiency should be quite good.

Qualcomm Snapdragon 6s 4G Gen 1

The Qualcomm Snapdragon 6s 4G Gen 1 is a renamed Snapdragon 662 SoC of the lower mid-range for (Android based) smartphones and tablets. The processor unit contains 8 Kryo-260 CPU cores (4x ARM Cortex-A73 with up to 2.1 GHz and 4x ARM Cortex-A53 with up to 1.8 GHz). The Qualcomm Adreno 610 is used as the graphics unit

The SoC comes with the third generation of Qualcomm's AI Engine and also includes Bluetooth 5.1. It is interesting to note that Qualcomm describes the Wi-Fi capability as "WiFi-6-ready", meaning you can connect to a WiFi 6 network, but not all parts of the standard are supported. The new WPS3 security protocol can be used. Support for the HEIF image file format and the Indian satellite network NavIC are also new.

The performance should be very similar to the old Snapdragon 662 (see for benchmarks).

The Snapdragon X11 is integrated as an LTE modem, which supports LTE Cat.13 in the uplink and downlink, as well as 2x2 MIMO in the downlink. The maximum transmission speed is 390 MBit/s (download) and 150 MBit/s (upload).

In terms of mass storage, a maximum of UFS 2.1 is supported, the memory limits are 32 GB and LP4x.

The SoC is manufactured using the 11 nm process.