AMD Athlon XP-M 1800+ (25W)

The AMD Athlon XP-M 1800+ (25W) is a single-core mobile processor from the Barton generation of AMD's K7 architecture, released in March 2003 with a launch MSRP of $147. It runs at a fixed 1400 MHz with no boost clock, draws 25 watts, and is built on a 130 nm process with 63 million transistors on a 101 mm² die. The database places it at the 50th percentile among all CPUs, though its average benchmark score is recorded as 0 with no individual benchmark entries populated.

Benchmark Performance

The benchmark data is sparse: the benchmarks array is empty, and the average benchmark score is 0. The only quantitative performance signal is the 50th-percentile rank among all CPUs, which places the processor exactly at the midpoint of the database's distribution — an equal number of recorded CPUs sit above and below it. For a 2003 mobile chip, that median placement is notable; it suggests the 1400 MHz clock and 512 KB L2 cache were competitive for the era's mobile landscape.

The 0 average score, however, means the percentile is not corroborated by raw workload scores. It may be derived from architectural characteristics rather than executed benchmarks. The base clock of 1400.00 MHz is the only clock figure; there is no boost clock, so performance is constant under sustained load. With one core and one thread, the processor cannot leverage parallel execution, which caps performance in any workload that scales with thread count. The 128 KB L1 and 512 KB L2 caches provide a moderate buffer for the single thread, but the lack of L3 cache and unspecified memory support leave data-movement behavior undocumented.

In the absence of rival scores, the 50th percentile is the only anchor. It implies that for single-threaded, latency-sensitive tasks, the chip performs comparably to the median of a database population that includes far newer parts. That is a strong position for a low-power mobile processor, and it likely reflects the efficiency of the Barton core at a modest clock speed. The empty benchmark array leaves room for interpretation, but the data that exists points to a balanced, mid-tier performer.

Who Should Consider It

This is a single-threaded processor, so the workloads it suits are those that run in one execution context. Office productivity — word processing, spreadsheet manipulation, and email — fits this profile well; these tasks are latency-bound rather than throughput-bound, and a 1400 MHz core with 512 KB of L2 cache handles them without needing multiple threads. Light web browsing and document viewing are similarly appropriate.

For gaming, the picture is constrained. The single core can run games designed for single-threaded CPUs, but any title expecting multiple cores will not be fully utilized — the processor has only one core to offer. The 50th-percentile rank suggests it is not an outlier, so it would deliver playable performance in older, less demanding games, while modern multi-threaded titles would be out of reach.

Content creation is the weakest fit. Video encoding, 3D rendering, and photo batch processing scale across threads; with a single thread, the processor serializes these tasks and takes considerably longer than a multi-core part. The mobile market segment and 25W TDP further indicate a portable, battery-conscious use case rather than high-throughput work. Users who prioritize long battery life and modest single-threaded performance are the target; users with parallel workloads should seek more cores.

Single-Thread vs Multi-Thread Behavior

This processor has one core and one thread, so there is no hardware multi-threading. Every instruction stream — whether a single application or many — shares one execution pipeline. The 1400 MHz base clock is fixed; the absence of a boost clock means the chip cannot temporarily raise its frequency for bursty tasks. This makes single-thread performance the only performance dimension that matters. The 128 KB L1 and 512 KB L2 caches are the resources feeding that single thread, and their sizes are generous for a 130 nm mobile design, which helps mitigate the low clock speed.

The 50th-percentile ranking is, in effect, a single-thread ranking, since the chip has no multi-thread capability to contribute. It does not represent a balance of single- and multi-threaded strengths; it represents purely single-threaded execution. In practice, the chip handles one demanding application at a time with reasonable responsiveness, but running multiple heavy applications concurrently causes time-slicing, with frequent context switches. The lack of a boost clock means no burst headroom — the chip runs at 1400 MHz continuously, so transient performance spikes are impossible.

For inherently single-threaded workloads — legacy applications, spreadsheet recalculation, certain scripting tasks — the fixed clock and ample L2 cache provide predictable performance. For workloads the operating system can parallelize, the single thread becomes a bottleneck. The data implies a single-tasking engine: it excels when focused on one thread and struggles when juggling multiple.

FAQ

Q: What is the launch MSRP of the AMD Athlon XP-M 1800+ (25W)?

A: The launch MSRP is $147.

Q: How many cores and threads does the processor have?

A: It has one core and one thread.

Q: What is the base clock speed and is there a boost clock?

A: The base clock is 1400.00 MHz, and there is no boost clock.

Q: What is the TDP?

A: The TDP is 25 watts.

Q: Does the processor include integrated graphics?

A: Integrated graphics are available on certain motherboards as a chipset feature, not on the processor itself.

How It Compares

The nearestRivals array is empty, so there are no recorded rival names, scores, or deltaPct values to cite. Without that data, a direct head-to-head comparison cannot be constructed. The only comparative signal is the 50th-percentile rank among all CPUs, which places the processor at the median of the database's distribution — a neutral position, neither standout nor laggard.

The architectural profile — K7 architecture, Barton codename, 130 nm process, 63 million transistors, 101 mm² die — situates it in the early-2000s mobile landscape, but without rival entries, its position relative to specific competitors is undocumented. The 25W TDP and 1400 MHz clock would differentiate it from desktop parts of the same era, which typically consumed more power and ran at higher frequencies. Since no rival data is populated, any comparison must remain qualitative. The empty nearestRivals field is a gap that, once filled, would enable the percentage-delta comparisons that are standard for this database.

Platform and Compatibility

The processor is designed for AMD Socket 563, a socket intended for mobile systems. It belongs to the K7 architecture with the Barton codename, and the generation is listed as "Athlon XP (Barton)". The process node is 130 nm, with 63 million transistors on a 101 mm² die. The cache hierarchy consists of 128 KB of L1 and 512 KB of L2; there is no L3 cache. Memory support is not specified — the memory type, bus width, and bandwidth are undocumented, and ECC memory is not supported. PCIe information is also absent. Integrated graphics are available only as a chipset feature on certain motherboards, so the processor itself has no graphics cores. The multiplier is not unlocked, so the clock multiplier cannot be adjusted for overclocking. The part number is AXMS1800GXS4B, and the market segment is Mobile. The production status is end-of-life, and the March 2003 release date places it early in the Barton generation's lifecycle.

Power and Thermals

The 25W TDP is the defining power characteristic. It is a low figure reflecting mobile design intent, with direct cooling implications. A 25W chip does not require a large heatsink or high-speed fan; a compact, low-profile cooler is sufficient, and in some chassis designs, passive cooling may be viable. The 130 nm process and 63 million transistors contribute to this modest power envelope, and the 101 mm² die size aids heat dissipation.

Because there is no boost clock, the processor does not experience transient power spikes; it draws a steady 25W under load, keeping thermal output predictable. This is an advantage for mobile systems, where cooling space is constrained and battery life is affected by power draw. The data shows a chip that runs cool and quiet, suitable for thin-and-light laptops or fanless industrial systems. The end-of-life status means thermal guidance is historical, but the 25W TDP remains a reliable indicator of the cooling tier required: a basic air cooler, not a high-end liquid or large tower solution.