Qualcomm Snapdragon S1 QSD8250 vs Qualcomm Snapdragon S4 Plus MSM8260A vs Qualcomm Snapdragon S4 Pro APQ8064A

Qualcomm Snapdragon S1 QSD8250

The Qualcomm Snapdragon S1 QSD8250 was one of the first Snapdragon SoCs for smartphones and tablets featuring a Scorpion CPU core, an Adreno 200 GPU and GSM/UMTS radio.

Qualcomm Snapdragon S4 Plus MSM8260A

The Qualcomm MSM8260A (Snapdragon S4 series) is a ARM based high-end smartphone SoC in 2012. It contains two Krait (ARMv7) CPU cores at 1.5 - 1.7 GHz, a Adreno 225 GPU (400 MHz), a LPDDR2 memory controller (up to 500 MHz) and radio elements.  The chip is produced in 28nm LP (low power process) at TSMC. Compared to the MSM8960, the 8260A does not support LTE.

The Krait cores offer a slightly better performance as the standard Cortex-A9 cores and are compatible to the NEON SIMD extensions.

Qualcomm Snapdragon S4 Pro APQ8064A

The Qualcomm Snapdragon S4 Pro APQ8064A is a high-end SoC for Android smartphones and tablets, which was introduced in 2012. The chip integrates 4 CPU cores, which are based on the ARMv7-compatible, but by Qualcomm designed Krait architecture. This provides a much higher per-MHz performance than Cortex-A9 chips such as Nvidia's Tegra 3 or the Exynos 4412 from Samsung, but does not quite reach the performance of the Cortex-A15 (for example in the Tegra 4). The memory is accessed via 2 x 32 bit LPDDR2 at up to 533 MHz, which offers a bandwidth of 8.5 GB/s.

Thanks to a dedicated decoder, the SoC can accelerate 1080p video playback up to a frame rate of 30 fps. 3D photos are possible up to a resolution of 20 megapixels. In addition, the chip also integrates a wireless module with Bluetooth 4.0 and WLAN 802.11ac/a/b/g/n. Produced by TSMC in 28 nm (LP), the power consumption should be around 4 watts (estimated, depending on the clock speed).