AMD Athlon II X4 620

The AMD Athlon II X4 620 is a 4-core, 4-thread desktop processor built on the 45 nm K10 architecture, codenamed Propus. It runs at a fixed 2.60 GHz base clock with no boost capability, and is rated for a 95 W TDP on the AMD Socket AM3 platform. Released in 2009, the chip carries an average benchmark score of 593, placing it in the 13th percentile of all CPUs tested. Its benchmark profile aligns it directly with the Intel Core i3-2102 and Intel Core i5-580M, both of which match its average score exactly, while the Intel Core M-5Y51 trails by 0.1% and the Intel Xeon E5410 trails by 0.2%.

Single-Thread vs Multi-Thread Behavior

In Cinebench R23, the Athlon II X4 620 scores 243 in single-core and 1724 in multi-core. The multi-core figure is a large multiple of the single-core result, underscoring a design that favors parallel throughput over single-thread responsiveness. The R20 results repeat this pattern, with 102 single-core and 724 multi-core. Because the processor lacks a boost clock, its single-thread performance is strictly bound to the 2.60 GHz base frequency. The absence of an L3 cache (listed as null) means each core relies on its 512 KB per-core L2 and 128 KB per-core L1, which limits latency-sensitive single-threaded tasks. For real workloads, this split means applications that scale across four cores, such as video encoding or batch image processing, will see proportionally better performance than lightly threaded tasks like web browsing or legacy spreadsheet macros. The data shows a clear ceiling: single-thread performance is the bottleneck, while multi-thread scaling offers the only path to competitive results. Benchmark results indicate that the 13th percentile ranking is driven by this weak single-thread showing, as modern software increasingly demands higher per-core instructions per clock. The 4-thread configuration (threads: 4) means there is no simultaneous multithreading to mask memory latency or improve instruction-level parallelism, so the four physical cores must carry the entire workload alone.

Who Should Consider It

Given its 13th percentile standing and an average score of 593, the Athlon II X4 620 is suited for users working within the legacy AM3 ecosystem. For office productivity, the four cores at 2.60 GHz provide adequate throughput for document editing, email, and basic web applications, though the single-core score of 243 in R23 suggests that complex JavaScript or real-time collaboration suites may feel sluggish. Content creation is a mixed bag. Multi-threaded rendering tasks will leverage all four cores; the R23 multi-core score of 1724 allows for basic 3D scene rendering or video transcoding, but it trails modern entry-level processors by a wide margin. Gaming is the weakest category. The single-core R20 score of 102 and R23 score of 243 indicate that modern game engines, which often rely on 1-2 heavily loaded threads, will bottleneck here. Older titles designed for quad-core CPUs without hyper-threading may run acceptably, but frame pacing will suffer in physics and AI calculations. The chip's lack of an unlocked multiplier (multiplierUnlocked: false) removes overclocking as a mitigation for these weaknesses. Users with a spare AM3 motherboard and DDR3 memory will find it a serviceable stopgap, but it is not a primary recommendation for any current demanding workload. Its end-of-life status further confines it to second-hand or upgrade paths. The memory support is dual-channel DDR3, which is appropriate for the era but offers limited bandwidth compared to modern standards, further capping performance in memory-intensive creation tasks. The absence of ECC memory support (eccMemory: false) rules out professional workstation use where data integrity is critical.

Benchmark Performance

The average benchmark score of 593 places the Athlon II X4 620 in a dead heat with its nearest rivals. It matches the Intel Core i3-2102 and the Intel Core i5-580M with a 0% deltaPct, meaning there is no measurable difference in aggregate performance. The chip also edges out the Intel Core M-5Y51 by 0.1% and the Intel Xeon E5410 by 0.2%, though these margins are within run-to-run noise. Looking at specific Cinebench tests, the R15 multi-core score of 173 and R20 multi-core score of 724 show a consistent scaling pattern. The R23 multi-core result of 1724 confirms that the processor maintains its relative position across newer benchmark versions. The single-core R20 score of 102 and R23 score of 243 are telling; they anchor the chip to the 13th percentile. Compared to the Core i3-2102, which shares the exact same average score of 593, the Athlon's lack of a boost clock and smaller cache hierarchy (no L3) are offset by its four physical cores, resulting in a statistical tie. The 0.2% advantage over the Xeon E5410 is negligible, but it does show that the Athlon's K10 architecture holds its own against older server parts in aggregate workloads. In summary, the data indicates that this processor is functionally equivalent to a specific tier of CPUs, neither leading nor trailing its direct competitors by any meaningful margin. The 13th percentile ranking across all CPUs underscores that while it holds its own in this narrow peer group, it is decisively outpaced by the vast majority of modern processors.

FAQ

Q: What is the process node and die size of the AMD Athlon II X4 620?

A: The process node is 45 nm, and the die size is 169 mm².

Q: Does the processor support a boost clock?

A: No, the boost clock is listed as null, so it runs only at its 2.60 GHz base clock.

Q: What is the cache hierarchy of this chip?

A: It has 128 KB of L1 cache per core and 512 KB of L2 cache per core, with no L3 cache.

Q: What is the average benchmark score of the Athlon II X4 620?

A: The average benchmark score is 593.

Q: How does it compare to the Intel Xeon E5410?

A: It is 0.2% faster than the Intel Xeon E5410, which has an average score of 594.

Q: Is the multiplier unlocked for overclocking?

A: No, the multiplier is locked (multiplierUnlocked: false).

Power and Thermals

The Athlon II X4 620 is rated at a 95 W TDP, which defines its thermal envelope. Built on a 45 nm process node, the chip integrates 300 million transistors across a 169 mm² die. This combination of transistor count and die size, paired with a fixed 2.60 GHz clock, means power draw is predictable and steady under sustained load. The absence of a boost clock eliminates transient power spikes, keeping thermal output close to the TDP rating during multi-threaded workloads. For cooling, a 95 W TDP class implies a mainstream air cooler is sufficient; the data does not suggest the need for exotic liquid cooling or oversized heatsinks. The 45 nm process is relatively old by modern standards, so efficiency is not a strong suit, but the lack of turbo functionality means the chip never exceeds its nominal power envelope. Memory support is limited to dual-channel DDR3, and the platform uses PCIe Gen 2, both of which contribute to a modest overall system power footprint. The end-of-life status and 95 W rating make it a straightforward drop-in for legacy AM3 boards, where a standard 95 W-class cooler will keep thermals in check. The 13th percentile performance ranking aligns with its power characteristics: it is a low-to-mid-range part that prioritizes multi-core throughput over single-core efficiency, and its thermal design reflects that balance. Because it lacks a boost clock, the power curve is flat, which can be an advantage in small form factor builds where sustained load thermals are a concern, but it also means the chip cannot dynamically increase its clock speed to accelerate short bursts of work, leaving performance strictly tied to the 2.60 GHz base frequency.