AMD A4 PRO-3340B

The AMD A4 PRO-3340B is a 4-core, 4-thread mobile processor built on the 28 nm Jaguar architecture (Kabini codename), released in December 2014 and now end-of-life. With a 25 W TDP and integrated Radeon HD 8240 graphics, it targets low-power systems. Its average benchmark score of 500 places it in the 9th percentile of all CPUs, indicating entry-level performance.

How It Compares

The A4 PRO-3340B sits in a tightly contested performance cluster, with its nearest rivals all scoring between 499 and 503. Against the Intel Celeron G1820, the data shows a perfect 0% delta, meaning the two processors deliver identical average benchmark results. This parity suggests that for general computing tasks, the architectural differences between AMD's Jaguar cores and Intel's Haswell-derived Celeron are effectively neutralized in average workloads.

Versus the Intel Celeron G1630, the A4 holds a marginal 0.2% advantage. This is within run-to-run variance territory, so the data effectively shows these two as peers. The Celeron G1630 is an Ivy Bridge-era part, and the near-identical scores hint that both CPUs are limited by similar memory bandwidth and single-channel constraints rather than raw compute capability.

The Intel Core i3-2100T presents a slightly different picture, with the A4 trailing by 0.3%. The i3-2100T is a dual-core with Hyper-Threading, yet its 502 average score edges out the AMD part's 500. This is notable because the i3 has half the physical cores but still manages to keep pace, suggesting the A4's four Jaguar cores are less efficient per thread than Intel's older Sandy Bridge architecture.

The AMD Athlon II X3 440 shows the A4 behind by 0.6%. This is the largest delta in the rival set. The Athlon II X3 is a triple-core desktop part from the K10 era, and its slight lead indicates that even older AMD cores can match or surpass the Jaguar design when given sufficient power headroom and memory bandwidth.

Benchmark Performance

Looking at the Cinebench results, the A4 PRO-3340B scores 146 in R15 multi-core, 609 in R20 multi-core, and 1452 in R23 multi-core. The single-core scores are 86 in R20 and 205 in R23. These numbers paint a clear picture: the processor is firmly in entry-level territory, with the multi-core R23 score of 1452 representing less than a third of what mainstream desktop CPUs achieve.

The average benchmark score of 500 places the A4 exactly at parity with the Intel Celeron G1820 (deltaPct 0). Against the Celeron G1630, the A4 leads by 0.2%, which translates to roughly one point in the average score. The Core i3-2100T outscores the A4 by 0.3% (502 vs 500), and the Athlon II X3 440 leads by 0.6% (503 vs 500). These deltas are so small that they are essentially negligible in real-world usage.

The percentile rank of 9% is the most telling metric. This means the A4 PRO-3340B performs better than only 9% of all CPUs in the benchmark database. The 500-point average score, when viewed against the 9th percentile ranking, confirms that this processor is designed for basic tasks rather than demanding workloads. The R23 single-core score of 205 is particularly low, indicating that even lightweight single-threaded applications will feel sluggish.

Platform and Compatibility

The A4 PRO-3340B uses AMD Socket FT3, a ball-grid-array (BGA) package designed for mobile and embedded systems. This socket is not upgradeable in the traditional sense, as the processor is soldered to the motherboard. The platform supports DDR3 memory in a single-channel configuration, with a maximum memory bandwidth of 12.8 GB/s. This bandwidth figure is a critical bottleneck, as single-channel memory halves the data throughput compared to dual-channel setups.

PCIe support is limited to Gen 2 with 8 lanes from the CPU. This means discrete graphics or NVMe storage would be constrained by both the older PCIe generation and the reduced lane count. The platform does not support ECC memory, which rules out certain workstation and server use cases. The integrated Radeon HD 8240 graphics eliminates the need for a separate GPU in basic systems, but its performance tier is appropriate only for desktop composition and video playback.

The upgrade path is essentially nonexistent. With the processor soldered onto the motherboard and the FT3 socket being a legacy platform, users are locked into the A4 PRO-3340B for the life of the system. The 28 nm process node from GlobalFoundries and the 107 mm² die size are consistent with the low-power design goals, but they also mean the platform lacks modern features like PCIe Gen 4 or DDR4 memory support.

Who Should Consider It

The benchmark data suggests this processor is suitable only for the most basic computing tasks. The 9th percentile ranking and sub-1500 R23 multi-core scores indicate that office productivity applications like word processing and spreadsheet work would run, but with noticeable delays during multitasking. The single-channel memory and low core clock speed of 2.20 GHz further limit responsiveness.

For gaming, the A4 PRO-3340B is not a viable option. The Radeon HD 8240 integrated graphics, combined with the low CPU performance, would struggle with even older titles at minimal settings. The 205 single-core R23 score is roughly a quarter of what modern budget CPUs achieve, meaning game logic and physics calculations would become a bottleneck.

Content creation workloads are out of reach. The multi-core scores of 609 (R20) and 1452 (R23) are far too low for video encoding, 3D rendering, or photo editing. The 4 threads without SMT mean parallel workloads have limited scaling, and the 2 MB shared L2 cache is small by modern standards. The processor could handle basic web browsing and email, but even moderately complex JavaScript-heavy sites would cause measurable lag.

Power and Thermals

The 25 W TDP places the A4 PRO-3340B in the ultra-low-power segment. This is the defining characteristic of the processor, as it enables fanless or passively cooled designs in thin-and-light laptops and compact embedded systems. The Jaguar architecture was specifically designed for this power envelope, sacrificing performance for efficiency.

The thermal implications are straightforward: a 25 W TDP requires only a basic cooling solution. A small aluminum heatsink or a low-profile fan is sufficient to maintain safe operating temperatures. This makes the processor attractive for always-on devices like network-attached storage units or digital signage, where low heat generation reduces system noise and improves reliability.

However, the low TDP comes with a performance cost. The 2.20 GHz base clock is the only clock speed listed, with no boost clock available. This means the processor operates at a fixed frequency under all conditions, and the 12.8 GB/s single-channel memory bandwidth further constrains performance. The data shows that the 25 W power budget does not translate into competitive performance, as the average score of 500 is on par with much older, higher-power parts.

Single-Thread vs Multi-Thread Behavior

The split between single-thread and multi-thread performance is stark. The R23 single-core score of 205 is only 14% of the multi-core score of 1452, which is expected for a 4-core processor with no SMT. However, the absolute values are what matter: a 205 single-core score is among the lowest in the database, indicating poor per-thread efficiency.

The Jaguar architecture's in-order execution and modest clock speed of 2.20 GHz contribute to this weakness. Single-threaded tasks like web browsing, document formatting, and disk operations will all feel sluggish. The multi-core scores are slightly better proportionally, but the 609 R20 and 1452 R23 results still place the processor in the bottom decile globally.

The practical implication is that the A4 PRO-3340B can handle multiple light tasks simultaneously, but each individual task will run slowly. This is the opposite of a processor that excels at single-threaded responsiveness. For a system running a single application with minimal background activity, the performance is tolerable; for a modern operating system with background updates and security scans, the processor will struggle to keep the UI responsive.

FAQ

Q: What is the average benchmark score of the AMD A4 PRO-3340B?

A: The average benchmark score is 500, which places it in the 9th percentile of all CPUs in the database.

Q: How does the A4 PRO-3340B compare to the Intel Celeron G1820?

A: The two processors have identical average scores of 500, with a deltaPct of 0%, indicating no measurable performance difference.

Q: What memory bandwidth does the A4 PRO-3340B support?

A: The processor supports single-channel DDR3 memory with a maximum bandwidth of 12.8 GB/s. It does not support ECC memory.

Q: What is the TDP and what cooling does it require?

A: The TDP is 25 W, which implies a basic cooling solution such as a small heatsink or low-profile fan is sufficient.

Q: Does the A4 PRO-3340B have an integrated GPU?

A: Yes, it includes the Radeon HD 8240 integrated graphics, which is suitable for basic display output and video playback.

Q: What is the single-core performance in Cinebench R23?

A: The R23 single-core score is 205, while the multi-core score is 1452, showing a significant gap that indicates weak per-thread performance.