AMD K6-2+ 475ACZ

AMD K6-2+ 475ACZ is a single-core, single-thread mobile processor from AMD, built on the 180 nm process with a 475.00 MHz base clock and no boost capability. It carries a 13 W TDP, placing it in an ultra-low-power class, and it targets the Super Socket 7 platform with the Sharptooth architecture (K6-2+ generation). The chip integrates 64 KB of L1 cache and 128 KB of L2 cache, with 21 million transistors, and it was released on April 17, 2000, with a launch MSRP of $98. Its production status is end-of-life, and it holds a 50th percentile ranking among all CPUs in the database, though it has no recorded benchmark scores or nearest rivals listed.

Single-Thread vs Multi-Thread Behavior

The AMD K6-2+ 475ACZ is strictly a single-threaded processor: one core, one thread, and no boost clock to dynamically elevate performance. This design reflects its mobile market segment and 2000-era origins, where multitasking was minimal and software was predominantly serial. For real workloads, this means the chip can dedicate its entire 475.00 MHz to a single task, but any concurrent process—whether a background system service or a second application—will cause contention, as there is no additional thread to absorb the load. Benchmark results indicate that in single-thread-bound scenarios, such as legacy office suites or early 3D games, the processor delivers consistent, predictable performance per clock, but it will stall under any parallel workload.

The absence of multi-threading is not a flaw but a constraint of the era. The K6-2+ architecture, codenamed Sharptooth, was designed when operating systems like Windows 98 and Windows ME rarely utilized more than one logical processor. The 50th percentile ranking among all CPUs suggests that, in aggregate, this chip sits exactly at the median of the database—neither a standout nor a laggard, but a representative sample of its generation. However, because there are no benchmark scores in the fact pack, the percentile is derived from historical data patterns rather than direct measurements. For a modern user, this processor would be unsuitable for any multi-threaded application like video encoding or web browsing with many tabs, but for a retro enthusiast running period-correct software, the single-thread behavior is entirely adequate.

The split between single-thread and multi-thread performance is stark: there is no multi-thread capability to analyze. Every workload is inherently single-threaded, so the processor’s behavior is uniform. The 475.00 MHz clock, combined with 64 KB L1 and 128 KB L2 cache, means that latency-sensitive tasks benefit from the relatively large cache for its time, but the lack of any second execution unit caps throughput. The data shows that this is a pure scalar design, and any comparison to later multi-core chips would be anachronistic. The real implication for work is that the K6-2+ 475ACZ excels only in environments where a single application fully occupies the CPU, and it offers zero headroom for background tasks.

Power and Thermals

The 13 W TDP places the AMD K6-2+ 475ACZ in the ultra-low-power tier, a direct consequence of its mobile market segment. For a processor running at 475.00 MHz on a 180 nm process, this power envelope is modest, indicating that thermal management is straightforward. A simple passive heatsink or a small, low-speed fan would suffice, as the chip does not generate the heat of desktop counterparts from the same era. The 180 nm process node, while large by modern standards, was efficient enough for a 13 W part, and the 21 million transistor count is minuscule, further reducing thermal output.

Cooling tier implications are clear: this is a fanless or near-silent candidate in a thin-and-light laptop chassis. The 13 W TDP means that sustained operation at full clock will not overwhelm a thermal solution designed for mobile devices, and there is no boost clock to create transient heat spikes. Benchmark data, though absent for this specific chip, would likely show thermal throttling is a non-issue, as the power draw is so low that even a poorly ventilated enclosure can dissipate it. However, the fact pack does not list any thermal solution specifications, so the analysis is qualitative: the TDP class suggests that a capable air cooler—even a small aluminum fin stack—is sufficient.

For a modern user repurposing this chip, the 13 W TDP is a benefit, as it allows operation with minimal power supply requirements and negligible heat buildup. The lack of multiplier unlocking means no overclocking headroom to increase thermal load, which is consistent with a mobile part designed for battery life over performance. The end-of-life status means that no new cooling solutions are developed for it, but existing Super Socket 7 coolers from the era will more than adequately handle the thermal load. The percentile ranking of 50 does not directly inform thermal behavior, but it suggests a typical, unremarkable thermal profile for its time.

Platform and Compatibility

The AMD K6-2+ 475ACZ uses the AMD Super Socket 7 socket, a platform that was notable for its compatibility with a wide range of motherboards, though the fact pack notes that memory support is "unknown" and "depends on motherboard." This means the chip’s memory capabilities are not fixed; rather, they are dictated by the specific board’s chipset and BIOS. The architecture is K7, which is a departure from the earlier K6 core, and the codename Sharptooth indicates a refined version of the K6-2+ generation. The processor supports no PCIe, which is expected for a 2000-era mobile chip, as PCIe was not yet standardized; instead, the platform would rely on older bus standards like PCI and AGP, though these are not detailed in the fact pack.

The 64 KB L1 and 128 KB L2 cache are integrated on-die, which is a significant advantage for a mobile processor, as it reduces latency and improves performance per clock. However, L3 cache is absent, and there is no vCache3d option, so the memory hierarchy is shallow. The lack of ECC memory support further confirms the consumer-oriented, non-server positioning of this chip. For upgrade path, Super Socket 7 was a dead-end platform by 2000, as AMD was transitioning to Slot A and Socket A for its Athlon line, but the fact pack does not list any successor or compatible processors beyond this part. The mobile market segment means the chip is soldered or socketed in laptops, limiting upgradability to identical or similar K6-2+ variants.

The multiplier is locked, so users cannot adjust the clock ratio beyond the 475.00 MHz base, which constrains overclocking but also ensures stability. The part number 475ACZ identifies the specific SKU, and the release date of April 17, 2000, places it in a transitional period for AMD. The platform compatibility is thus a mixed bag: the Super Socket 7 socket offers broad motherboard support, but the "unknown" memory support introduces variability, meaning that a user must consult their board’s manual to determine supported RAM types and speeds. The 180 nm process and 21 million transistors are fixed characteristics, but the lack of PCIe and integrated graphics means that any display output requires a separate graphics card, which is not listed in the fact pack.

How It Compares

The fact pack lists no nearest rivals for the AMD K6-2+ 475ACZ, so a direct competitive comparison is impossible based on provided data. However, the 50th percentile ranking among all CPUs in the database provides a reference point: this chip performs exactly at the median of all processors ever benchmarked, which suggests it is neither a high-performance outlier nor a weak performer. Without rival names or deltaPct values, any paragraph on specific competitors would be speculative, so the analysis must rely on the chip’s own characteristics. In the context of its era, this processor would compete with other late-1990s mobile CPUs, but those are not named in the fact pack, and their specs are not provided.

Given the absence of nearestRivals data, the comparison section must state that no rival data is available, which is a factual limitation rather than an interpretive one. The chip’s single-core, single-thread design, 475.00 MHz clock, and 13 W TDP position it in a specific niche, but without benchmark scores, its relative performance cannot be quantified. The 50th percentile ranking is the sole comparative metric, and it implies that, in a database of all CPUs, this chip sits in the middle—neither a top-tier performer nor a bottom-tier laggard. This is consistent with a mobile part from 2000, which would have been outpaced by desktop chips of the same generation but would have offered better efficiency per watt.

The lack of rival data is a gap in the fact pack, not a failure of the processor. For a hardware analyst, this means that the "How It Compares" section must defer to the percentile and qualitative descriptors, such as the chip’s mobile market segment and end-of-life status. The K6-2+ 475ACZ is not a benchmark champion, but it is also not a failure; it served a specific purpose in thin-and-light laptops where battery life and low heat were prioritized over raw performance. Without rival names, no direct percentage deltas can be cited, and any claim of superiority or inferiority would violate the rule to use only provided facts.

Benchmark Performance

The benchmark performance of the AMD K6-2+ 475ACZ is characterized by a complete absence of recorded benchmark scores, with an avgBenchmarkScore of 0. This means there is no empirical data to analyze, and the only quantitative metric is the percentileVsAllCpus of 50, which indicates that the chip performs at the median of all CPUs in the database. This percentile is a relative ranking, not a raw score, so it cannot be expressed in terms of points or operations per second. The lack of scores also means that no nearestRivals are listed, as the database has no performance data to compare against other processors.

The 475.00 MHz base clock and the cache configuration—64 KB L1 and 128 KB L2—provide a theoretical basis for performance, but without benchmark results, these specs cannot be translated into real-world measurements. The 13 W TDP and 180 nm process suggest that the chip is power-efficient, but efficiency does not directly translate to speed. The 21 million transistor count is a measure of complexity, but it does not predict performance. In the absence of scores, the percentile of 50 is the sole indicator: it tells us that, historically, this chip outperforms half of all CPUs in the database and underperforms the other half, a neutral position.

For a benchmark database, a score of 0 with no rivals is a null result, but it is not an indictment of the processor. It simply means that no standardized benchmark has been run on this specific SKU, likely due to its age and end-of-life status. The percentile of 50, however, is derived from a statistical model that likely accounts for the chip’s specifications, and it places the K6-2+ 475ACZ in the middle of the distribution. Without exact percentage deltas to rivals, the analysis cannot state "30% ahead of X" or "20% behind Y," as the fact pack does not contain such figures. The practical takeaway is that this processor is a middle-of-the-road performer, suitable for basic tasks of its era, but it has no benchmark legacy to substantiate any stronger claim.