Qualcomm Adreno 320 vs Qualcomm Adreno 510 vs Qualcomm Adreno 308

Qualcomm Adreno 320

The Qualcomm Adreno 320 is a GPU for smartphones and tablets that is integrated into Qualcomm SoCs. It was introduced in the end of 2012 and was primarily used for Android devices. The graphics card uses a technology called FlexRender. It can switch "intelligently" switch between TBR (TBR Tile Based Renderer) and the classic direct rendering. 

The Adreno 320 has Unified Shaders and supports OpenGL ES 3.0. The performance compared to the Adreno 200-series is supposed to be improved by the factor 3-4. 

The Adreno 320 is used in Snapdragon S4 SoCs like the AQP8064.

Qualcomm Adreno 510

The Qualcomm Adreno 510 is a mobile graphics card for mid-range smartphones and tablets (mostly Android based). It is included in the Qualcomm Snapdragon 650 and 652 SoCs and based on the Adreno 500 architecture (like the Adreno 520 in the S820, which should be fully compatible in software).

The GPU supports modern standards like Vulkan 1.0 (according to Wikipedia), OpenGL ES 3.1 + AE (3.2 in other sources), OpenCL 2.0 and DirectX 12 (FL 12.1 according to Wikipedia, 11.1 according to Qualcomm). Furthermore, the GPU supports Universal Bandwidth Compression (UBWC) to save memory bandwidth.

Compared the the faster Adreno 530, the 510 is currently produced in the older 28nm process (650 and 652) and should offer less ALUs. The clock speed is not disclosed.

Early benchmarks and performance ratings from Qualcomm position the GPU on a level with the old Adreno 330 (former high end GPU) in the Snapdragon 810. Therefore, it should be able to handle most Android games up to Full HD fluently.

Qualcomm Adreno 308

The Qualcomm Adreno 308 is an integrated graphics unit for smartphones and tablets that is used for mainstream SoCs of the Qualcomm Snapdragon 425-series. Like the other Adreno 30x GPUs, the Adreno 308 most likely also features 24 ALUs (unified shaders). More information on the architecture of the A3xx series can be found on github.com.