The short answer: Snapdragon S4-powered devices are generally faster than Apple’s A4-based devices, especially for multi-core tasks and graphics. Both are legacy chips by today’s standards, so the gap is largely historical rather than relevant to current hardware.
To understand the question, it helps to know what each chip represents and how they evolved. The Apple A4, introduced in 2010, was Apple’s first system-on-chip built around a single Cortex-A8 core and a PowerVR GPU. The Qualcomm Snapdragon S4 family, arriving around 2012–2013, encompassed several variants with dual- or quad-core CPUs, newer Adreno GPUs, and often LTE support. This article compares their architecture, real‑world performance, and where each stood in its respective era.
Technical snapshots
Apple A4
Introduced in 2010, the A4 was Apple’s first integrated SoC, consolidating CPU, GPU, memory controller, and other components on one chip. It features a single ARM Cortex-A8 core (about 1 GHz in many devices) and a PowerVR SGX535 GPU. The design emphasized efficiency and smooth everyday tasks for iPhone 4 and the iPad 2, but it’s clearly outpaced by modern mobile chips.
Qualcomm Snapdragon S4
The Snapdragon S4 family arrived in the early 2010s and included several variants. Early S4 devices used dual-core CPUs (Krait) around 1.5 GHz with Adreno 225 GPUs, while later S4 Pro models used quad-core CPUs and higher-end Adreno GPUs (for example Adreno 320). Built on a 28nm process in many versions, these chips added LTE, improved IPC, and stronger graphics performance compared with the A4.
How speed translates in practice
Below are the main factors that determine how fast each chip feels in everyday use, from core design to graphics and memory.
Key speed factors
- CPU core count and IPC: A4 uses a single-core Cortex-A8; S4 variants use dual-core or quad-core CPUs with higher per-core performance.
- Manufacturing process: A4 is built on a larger process (roughly 45nm) versus S4 variants that often used 28nm, enabling better efficiency and higher potential clocks.
- GPU power: A4’s PowerVR SGX535 is older; S4 variants use Adreno GPUs with substantially better graphics throughput for gaming and visuals.
- Memory bandwidth and RAM: A4-era devices had modest RAM; S4 devices typically paired with more capable memory interfaces in their time, aiding multitasking and data throughput.
In practical terms, for the era’s everyday tasks—web browsing, app launches, and casual gaming—the S4-powered devices generally felt faster than iPhone 4-era hardware with the A4, particularly in graphics and multitasking. Software optimization and thermal throttling could still affect performance, but the architectural advantages of the S4 variants were clear.
Benchmarks and real-world usage
People assessing speed for devices powered by A4 versus S4 often cite benchmark results and user experiences from their respective eras. The A4’s single, older CPU design lagged behind multi-core S4 CPUs in multi-threaded workloads and graphics-intensive games. Conversely, lighter tasks and well-optimized apps could sometimes feel comparable on certain devices, but that parity was rare as software expectations grew.
- Single-threaded tasks: A4 tends to be slower due to its single-core design and lower per-clock efficiency.
- Multi-threaded tasks and gaming: S4 variants typically deliver stronger performance thanks to multiple cores and newer GPUs.
- Power efficiency: The 28nm process and modern GPU architectures of S4 variants often yielded better sustained performance and battery life in comparable workloads.
In real-world usage, S4-based devices generally offered smoother web pages, faster app launches, and more capable gaming than A4 devices, reflecting the evolution of mobile silicon over a few short years. Yet both generations are now considered obsolete for new devices, with modern chips delivering far greater speed and efficiency.
Bottom line
Overall, the Snapdragon S4 family is faster than Apple’s A4 for most workloads, particularly multi-core tasks and graphics. However, both are legacy technologies by today’s standards, and contemporary smartphones use vastly more powerful silicon that dwarfs either chip.
Summary
In short, if you’re comparing Apple A4 and Qualcomm Snapdragon S4, the S4 is the faster option in nearly all common tasks of its time. For modern performance, however, you’d want current-generation chips from Apple, Qualcomm, or other manufacturers, since both A4 and S4 were superseded by several generations of more capable processors.