The Qualcomm Snapdragon 439 (SD439) is a lower mainstream SoC for (Android based) smartphones and tablets. Compared to the older Snapdragon 435, the 439 is now manufactured in the current 12nm FinFET process and offers higher clock speeds of 2 GHz of the eight ARM Cortex-A53 cores (compared to 1.4 GHz). Wifi (now ac Wave 2 / Wifi 5) and Bluetooth (v5) were also updated, however the GPU still is the rather slow Adreno 505 and the LTE modem was even downgraded to a X6 with only Cat. 4/5 (max. 150 Mbps download, 75 Mbps upload).
Thanks to the higher maximum clock speed, the performance of the Snapdragon 439 mobile platform can reach the old Snapdragon 625 (also 2 GHz with 8x Cortex-A53). However, there is still a big gap to the SoCs with bigger performance cores.
The 1.5 GHz MediaTek MT6735M is a 64-bit ARM-based SoC launched in mid 2015 primarily for small budget to mainstream Android devices. The quad-core processor is manufactured in 28 nm and is based on the Cortex-A53 architecture. It integrates a cat.4 LTE modem with CDMA2000 and an ARM Mali-720 GPU capable of decoding and encoding videos of up to 1080p30. Compared to the MT6732, the MT6735M utilizes a slower graphics unit. Compared to the similar MediaTek MT6735, the "M"-version is significantly lower clocked (only 1 versus 1.5 GHz).
Processor
The Cortex-A53 is the successor to the popular Cortex-A7 design. In addition to the jump from 32-bit to 64-bit architecture (ARMv8 ISA) to address more than 4 GB of memory, the new design offers better branch prediction and higher performance-to-power ratio that rivals the Cortex-A9. The four cores of the MT6732 are clocked at up to 1 GHz and therefore the MT6735M is significantly slower than other A53 SoCs that are usually clocked at 1.4 GHz and up.
The power-efficient processor is still suited for low demanding tasks like browsing and running light applications.
Graphics
The integrated single-core Mali-T720 is an entry-level GPU clocked at up to 450 MHz. Most Android games will play at acceptable frame rates on medium resolutions and quality.
Features
The MT6732M SoC integrates a memory controller (32-bit LPDDR3, 6.4 GB/s), multiple radios (WLAN, Bluetooth, GPS), and a cellular modem (GSM, UMTS, GPRS, HSPA+, HSUPA, TD-SCDMA, EVDO, and LTE Cat 4). Its integrated video engine allows for 1080p playback at 30 FPS. Cameras are supported up to 13 MP.
The Qualcomm Snapdragon 615 MSM8939 is a mid-range ARMv8-based SoC largely for Android tablets and smartphones. Announced in February 2014, the S615 is one of the first 64-bit capable SoCs from Qualcomm. In addition to 8 Cortex-A53 CPU cores at up to 1.7 GHz, the SoC integrates an Adreno 405 GPU with a 2x 32-bit memory controller (LPDDR3-1600, 12.8 GB/s) and supports Wi-Fi (802.11ac), Bluetooth 4.0, UMTS, and LTE.
CPU
The Cortex-A53 is the successor to the very popular Cortex-A7 design. In addition to the new 64-bit capable ARMv8 ISA, the cores offer a variety of other improvements such as better branch prediction. This leads to a significantly higher performance per clock, which is even above the older Cortex-A9.
The eight cores of the Snapdragon 615 are divided into two quad-core clusters, each optimized for a different operating point. While one cluster can clock up to 1.7 GHz to handle more demanding applications, the other cluster is limited to a maximum of 1.0 GHz for energy-saving purposes. All eight cores can be active at the same time, although most applications aren't parallelized to support 8 cores efficiently.
Overall, the Snapdragon 615 offers a performance similar to that of the older Snapdragon 600 (Krait architecture).
GPU
Another new feature is the integrated graphics unit named Adreno 405 (550 MHz). The Adreno 400 series has been substantially redesigned and supports DirectX 11.2 (FL 11_1) including hardware tessellation, OpenGL ES 3.1, and OpenCL 1.2. Furthermore, the performance has been significantly improved, which is now similar to the Adreno 320 and PowerVR G6200.
Features
The Snapdragon 615 offers numerous wireless technologies such as Bluetooth 4.0 and WLAN 802.11a/b/g/n/ac as well as a Multi-SIM cellular modem supporting LTE cat. 4 (up to 150 Mbps), WCDMA, CDMA, EV-DO, TD-SCDMA and GSM/EDGE.
The SoC can encode and decode 1080p videos using dedicated hardware and stream content to displays with up to 2560 x 2048 pixels. A large number of video codecs including H.265 (playback only) will be supported. The camera ISP can handle sensors with up to 21 MP.
Power Consumption
The Snapdragon 615 is manufactured by TSMC in a 28 nm LP process. According to the specifications, we expect a medium or medium-high power consumption for use in medium-sized or larger smartphones and tablets.
Average Benchmarks Qualcomm Snapdragon 439 → 100%n=8
Average Benchmarks Mediatek MT6735M → 45%n=8
Average Benchmarks Qualcomm Snapdragon 615 MSM8939 → 59%n=8
- Range of benchmark values for this graphics card - Average benchmark values for this graphics card * Smaller numbers mean a higher performance 1 This benchmark is not used for the average calculation
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