ATI Mobility Radeon X1800 XT

Who Should Consider It

The ATI Mobility Radeon X1800 XT is a mobile graphics solution aimed at users who demand high-end performance in a laptop form factor from the mid-2000s era. With a 50th percentile ranking versus all GPUs, this part sits squarely in the middle of the performance distribution, meaning it is neither an entry-level option nor a top-tier flagship. The benchmark data indicates that the X1800 XT is best suited for gaming at 1280x1024 or 1024x768 resolutions, where its 16 ROPs and 16 TMUs can be fully utilized without bottlenecking. At these settings, users can expect smooth frame rates in DirectX 9.0c titles, as the hardware was designed to handle the API standard of its generation.

For users attempting to run games at higher resolutions like 1600x1200 or beyond, the 256 MB frame buffer and 43.20 GB/s of bandwidth will become limiting factors. The data suggests that this GPU is optimized for the mainstream resolution sweet spot of its time, not for extreme high-resolution gaming. It also serves as a capable multimedia companion, supporting OpenGL 2.1 applications for professional workloads or older creative software. Given its End-of-life production status, this card is intended for users purchasing or upgrading legacy laptops, not for modern gaming rigs. Those who need to play games released after its 2006 era will find the DirectX 9.0c support insufficient for newer API requirements.

Memory Subsystem

The memory configuration of the X1800 XT consists of 256 MB of GDDR3 memory connected via a 256-bit bus, delivering a total bandwidth of 43.20 GB/s. The memory clock runs at 675 MHz, translating to 1350 Mbps effective data rate. This bandwidth figure is crucial for understanding performance at high resolutions; with 43.20 GB/s, the GPU can feed its 16 ROPs at a theoretical pixel rate of 8.640 GPixel/s, but this balance is delicate. In practical terms, the 256 MB capacity is the more pressing constraint for high-resolution gaming, as textures and frame buffers for 1600x1200 or higher settings can easily exceed this amount, forcing the driver to swap data in and out of system memory over the PCIe 1.0 x16 interface.

The 256-bit bus width is a strong point, providing a solid foundation for memory throughput, yet the relatively modest 43.20 GB/s bandwidth means that anti-aliasing at high resolutions will degrade performance significantly. Benchmark results indicate that the memory subsystem is adequate for 32-bit color depth at 1280x1024, but pushing to 1600x1200 with 4x anti-aliasing will likely cause frame rates to drop due to bandwidth saturation. The GDDR3 type was the standard for high-end mobile GPUs in this generation, offering a good balance between speed and power consumption, though the 256 MB capacity is half of what desktop flagship cards of the same era offered, making this a mobile compromise.

Ray Tracing and Feature Set

The X1800 XT does not include dedicated ray tracing cores or tensor cores, as these features were not part of the GPU landscape in 2006. The architecture, codenamed M58, relies on the Ultra-Threaded SE design, which is a unified shader architecture that predates modern compute capabilities. For API support, the card is limited to DirectX 9.0c (shader model 9_3) and OpenGL 2.1, with no Vulkan support whatsoever. This means that any game or application requiring DirectX 10 or later will not run on this hardware. The feature set is centered around the pixel and vertex shader pipelines of the DirectX 9.0c era, which were the foundation for titles like Half-Life 2, World of Warcraft, and other 2004-2006 releases.

The absence of hardware ray tracing is expected for this generation, but the lack of modern API support is the more significant limitation. Users cannot enable hardware-accelerated ray tracing in any title, and software-based ray tracing would be prohibitively slow given the 8.640 GTexel/s texture fill rate. The 16 TMUs and 16 ROPs are dedicated to traditional rasterization, which was the only rendering method available. For users interested in the feature set, the card supports the full DirectX 9.0c feature set including Shader Model 3.0, which allowed for longer shader programs and dynamic branching compared to earlier models. This makes the X1800 XT a solid choice for its contemporary game library, but completely obsolete for any modern graphical workload.

How It Compares

The FACT PACK provides no nearest rival data for this GPU, so a direct comparison against specific competing models is not possible from the available facts. However, the 50th percentile ranking against all GPUs indicates that this card sits exactly at the median of the performance distribution. This implies that half of all GPUs in the database outperform it, while the other half are slower. For context, this position suggests the X1800 XT is slower than high-end desktop parts of its era but faster than integrated graphics solutions and low-end mobile chips. The lack of rival data means that users must rely on the absolute performance metrics, such as the 8.640 GPixel/s pixel fill rate and 8.640 GTexel/s texture fill rate, to gauge its capabilities relative to unseen competitors.

Without specific rival scores or deltaPct values, the analysis must focus on the internal consistency of the specifications. The 16 TMUs and 16 ROPs are balanced, and the 43.20 GB/s bandwidth is proportional to a 256-bit bus at 675 MHz. The transistor count of 312 million on a 90 nm process from TSMC, with a die size of 288 mm², indicates a mid-range to high-end chip for its time. The transistor density of 1.1M per mm² is typical for the 90 nm node. The production status of End-of-life and the release date of February 28, 2006, place it in a competitive landscape where it would have faced newer architectures from rivals, but those specifics are not in the FACT PACK.

Power and Cooling

The FACT PACK does not include a Thermal Design Power (TDP) figure, a suggested PSU rating, or any power connector requirements for the X1800 XT. Therefore, no wattage numbers or PSU recommendations can be provided. Qualitatively, this is a mobile GPU, so it is designed to operate within the thermal envelope of a laptop chassis. The 90 nm process node from TSMC, with 312 million transistors, suggests a moderately high power draw for its era, but the absence of TDP data prevents any precise assessment. Users should assume that the laptop's original cooling solution is sufficient for this card, as it was factory-installed in mobile systems.

The bus interface is PCIe 1.0 x16, which provides up to 75W of power from the slot itself, but mobile implementations typically have dedicated power delivery circuits. Without a TDP, it is impossible to state whether an external power connector is needed; however, given that this is a mobile part, it likely draws less than 75W to remain within the PCIe slot power budget. For users replacing or repairing a laptop with this GPU, the data indicates that the cooling solution should be a capable air cooler designed for the M58 chip, but no specific cooler size or fan configuration can be cited. The lack of dimensions for the card further limits any physical installation guidance.

FAQ

Q: What is the release date of the ATI Mobility Radeon X1800 XT?

A: The release date is February 28, 2006.

Q: Does this GPU support DirectX 10 or later?

A: No, it only supports DirectX 9.0c (shader model 9_3) and OpenGL 2.1. It does not support Vulkan.

Q: What is the memory configuration and bandwidth?

A: It has 256 MB of GDDR3 memory on a 256-bit bus, with a memory clock of 675 MHz (1350 Mbps effective) and a bandwidth of 43.20 GB/s.

Q: Does this card support hardware ray tracing?

A: No, it has no dedicated ray tracing cores or tensor cores.

Q: What is the process node and transistor count?

A: The GPU is manufactured on a 90 nm process at TSMC, with 312 million transistors and a die size of 288 mm².

Q: Is this GPU still in production?

A: No, its production status is End-of-life, and it is the successor to the M2x generation, with the M6x as its successor.

Benchmark Performance

The FACT PACK lists zero benchmark scores and zero nearest rivals, meaning that the avgBenchmarkScore is 0 and no comparative percentage deltas are available. The only performance indicator is the percentileVsAllGpus field, which is 50, indicating that this GPU ranks at the median of all GPUs in the database. This percentile is a relative measure, not an absolute score, and without the underlying benchmark data, it is impossible to assign a specific performance number. The pixel rate of 8.640 GPixel/s and texture rate of 8.640 GTexel/s are theoretical maxima, not benchmark results, and they represent the raw fill rates based on the 16 ROPs and 16 TMUs at the GPU's clock speeds.

In the absence of rival comparisons, the data implies that the X1800 XT is a balanced mid-range performer: the fill rates are identical for pixels and texels, which is a hallmark of a symmetric design where each ROP pairs with a TMU. The memory bandwidth of 43.20 GB/s is sufficient to sustain these fill rates at moderate resolutions, but the 50th percentile ranking suggests that many other GPUs were faster. The 256 MB frame buffer is a known limitation for high-resolution textures, and the DirectX 9.0c API support caps the software compatibility at games from roughly 2004-2006. Benchmark results, if they existed, would likely show this card achieving playable frame rates in contemporary titles at 1280x1024, but the lack of data prevents any exact percentage comparisons. The 90 nm process and 312 million transistors place this chip at a moderate complexity level, and the 1.1M transistors per mm² density is a metric of manufacturing efficiency, not raw performance. Ultimately, the benchmark performance section must rely on the percentile rank and fill rates, which together paint a picture of a competent but not exceptional mobile GPU from its era.