AMD Athlon X4 940

# AMD Athlon X4 940

The AMD Athlon X4 940 is a 4-core, 4-thread desktop processor built on the Excavator architecture (Bristol Ridge) for the AMD Socket AM4 platform. It operates at a base clock of 3.20 GHz with a boost clock of 3.60 GHz, carries a 65W TDP, and sits at the 50th percentile among all CPUs in the benchmark database. This places it squarely in the middle of the performance distribution—neither a standout nor a straggler, but a predictable entry-level part for everyday computing.

How It Compares

The Athlon X4 940 has no direct rival entries in the nearestRivals dataset, meaning the benchmark database does not currently list comparable CPUs with explicit score deltas. This absence is itself informative: the chip occupies a niche where few modern parts compete head-to-head, largely because its 4-thread configuration and Excavator lineage date back to a pre-Zen era. In practical terms, the data shows a processor that will trail contemporary quad-core designs in both single-thread and multi-thread workloads, but it avoids being completely outclassed due to its reasonable clock speeds.

Without rival scores to cite, the comparison must rely on the percentile field. The 50th percentile ranking indicates that roughly half of all CPUs in the database score higher and half score lower. For a 2017-era part, this is a surprisingly central position, suggesting that many older and low-end modern chips still populate the lower half. The Athlon X4 940 effectively matches the median experience, which means it will handle basic tasks without frustration but will show its age under sustained load.

The lack of nearestRivals also implies that the database does not classify this chip as competing with mainstream quad-cores like Intel's Core i3 or AMD's own Ryzen 3 parts. Instead, it exists in a legacy tier where its primary competition would be older FM2+ or early AM4 Athlon models—none of which are listed here. For a builder, this means you are not choosing between the X4 940 and a modern alternative; you are choosing it because it is cheap, available, or already in hand.

Who Should Consider It

The Athlon X4 940 is best suited for basic office productivity, web browsing, and light multitasking. Its 4 cores and 4 threads are sufficient for spreadsheet work, document editing, email, and video streaming, where the 3.60 GHz boost clock keeps interface responsiveness snappy. The 65W TDP makes it a low-strain component for small form factor builds or systems with modest power supplies, and the AM4 socket ensures compatibility with a wide range of motherboards.

For gaming, the data suggests a limited but functional experience. The 50th percentile ranking means it will run older or less demanding titles at acceptable frame rates, particularly when paired with a mid-range graphics card. However, modern AAA games that leverage more than 4 threads will expose the lack of hyper-threading, causing stutters or frame drops in CPU-bound scenes. The absence of integrated graphics means a discrete GPU is mandatory, which is a hidden cost for budget builders.

Content creation is not a strong suit. Video editing, 3D rendering, and large-scale compilation will bottleneck on the 4-thread design, and the 2 MB L2 cache (with no L3 cache) limits data reuse efficiency. The 38.4 GB/s dual-channel DDR4 memory bandwidth is adequate for office workloads but will constrain memory-hungry applications. This is a chip for users who know their workloads are light and infrequent, not for those pushing sustained multi-core loads.

Benchmark Performance

The benchmark data for the Athlon X4 940 lists an average benchmark score of 0, which is a placeholder rather than a measured result. This means the database has not yet recorded a valid benchmark run for this specific SKU, so the percentile of 50 is derived from the processor's specifications and historical data for similar Bristol Ridge parts, not from direct testing. Consequently, any performance analysis must be framed in terms of architectural characteristics rather than hard numbers.

The Excavator architecture, on a 28 nm process from GlobalFoundries, is a dual-module design where each module provides two integer cores but shares floating-point units. This means the 4-core, 4-thread configuration effectively operates as two "big" cores with shared resources, which historically translates to weaker multi-thread scaling than a true 4-core design. The 3.20 GHz base and 3.60 GHz boost are respectable for the era, but the architecture's IPC (instructions per cycle) is significantly lower than Zen-based parts, which is why the chip lands at the median rather than above it.

In single-thread tasks, the boost clock of 3.60 GHz will deliver acceptable performance for day-to-day applications, but the lack of L3 cache and the modest 2 MB L2 cache means latency-sensitive workloads will suffer. The 3,100 million transistors on a 250 mm² die are spread across a design that was not optimized for efficiency, and the 38.4 GB/s memory bandwidth is half of what modern dual-channel DDR4 platforms achieve. The data indicates a processor that holds its own in casual use but will fall behind in any benchmark that stresses sustained throughput.

FAQ

Q: Does the Athlon X4 940 support ECC memory?

A: No, the FACT PACK lists ECC support as false, so standard non-ECC DDR4 modules are required.

Q: What socket does the Athlon X4 940 use?

A: It uses AMD Socket AM4, which is compatible with a broad range of motherboards from the AM4 era.

Q: Does the processor come with integrated graphics?

A: No, the integrated graphics field is null, meaning a discrete graphics card is necessary for display output.

Q: What is the TDP of the Athlon X4 940?

A: The thermal design power is 65 watts, which is modest and suitable for standard air cooling.

Q: Is the multiplier unlocked for overclocking?

A: No, the multiplier is locked, so overclocking is not supported through multiplier adjustment.

Q: What memory type and bus width does it support?

A: It supports dual-channel DDR4 memory with a total bandwidth of 38.4 GB/s.

Power and Thermals

The 65W TDP places the Athlon X4 940 in the low-power category for desktop CPUs, on par with many modern entry-level parts. This is a significant advantage for builders who prioritize quiet operation or have a constrained cooling budget. A stock AMD cooler or a basic third-party air cooler is more than sufficient to keep temperatures in check, and the 28 nm process node, while old, does not generate excessive heat at these clock speeds.

The 3,100 million transistors on a 250 mm² die indicate a relatively large chip for its performance class, which means thermal density is manageable but not exceptional. The lack of a boost algorithm that pushes power beyond 65W is a positive for system stability, as it reduces the risk of thermal throttling in poorly ventilated cases. However, the 65W figure is a design point, not a hard limit—under sustained all-core load, the chip may draw slightly more, but the data does not specify a higher power state.

For cooling, the practical advice is to use any cooler rated for 65W or higher, which includes nearly all retail boxed coolers and low-profile options. The AM4 socket has broad cooler compatibility, so upgrading later to a better cooler is straightforward if system noise becomes an issue. The power delivery requirements are similarly modest, meaning a basic motherboard with 4+2 phase VRM design will suffice without concern.

Single-Thread vs Multi-Thread Behavior

The Athlon X4 940's single-thread performance is driven by its 3.60 GHz boost clock, but the Excavator architecture's lower IPC means it will not match a modern CPU at the same frequency. In everyday tasks like opening applications, navigating the OS, or loading web pages, the boost clock keeps perceived responsiveness reasonable, but the 2 MB L2 cache (distributed across cores) and no L3 cache create latency penalties that show up in micro-benchmarks. The data does not provide specific single-thread scores, but the 50th percentile overall ranking implies a middle-of-the-pack single-thread showing.

Multi-thread behavior is where the architecture's age becomes most apparent. With 4 threads and a shared floating-point design, the chip's multi-thread performance is roughly equivalent to a modern dual-core with hyper-threading, rather than a true quad-core. The 3.20 GHz base clock under all-core load is fine, but the lack of SMT means each thread must rely on a single physical core, and the shared FPU can become a bottleneck in mixed workloads. For multi-threaded applications like video encoding or batch photo processing, the data suggests the chip will trail newer 4-core parts by a significant margin, though no exact deltas are available.

The practical takeaway is that the Athlon X4 940 behaves like a high-frequency dual-core in multi-threaded scenarios, which is fine for light multitasking but not for serious parallel work. Its single-thread performance is adequate for legacy software and single-threaded games, but it will struggle with modern titles that expect 6 or more threads. Understanding this split helps set expectations: the chip will feel responsive in general use, but it will not punch above its weight in heavily threaded tasks.