ATI Radeon X850 XT Platinum AGP

The ATI Radeon X850 XT Platinum AGP is a 130 nm part built on the R481 chip, representing the R400 architecture. It is an end-of-life product that targets the AGP 8x interface, a fact that shapes its entire usability profile. With 16 texture mapping units and 16 render output units, the card delivers a pixel rate of 8.640 GPixel/s and a texture rate of 8.640 GTexel/s. Its memory subsystem consists of 256 MB of GDDR3 on a 256-bit bus, running at 590 MHz (1180 Mbps effective) for a bandwidth of 37.76 GB/s. The card holds a 50th percentile position among all GPUs in the database, indicating it sits exactly at the median of the performance distribution. This data provides the basis for a methodical evaluation of where this card fits.

Who Should Consider It

The X850 XT Platinum AGP is a niche product defined by its bus interface. Benchmark results indicate that its 50th percentile ranking places it in a middle-ground performance tier, suitable for resolutions and settings that do not demand extreme pixel throughput. Given its 8.640 GPixel/s fill rate and 37.76 GB/s memory bandwidth, the card is best suited for 1024x768 or 1280x1024 gaming sessions with reduced detail settings. Users running at higher resolutions will find the pixel rate and bandwidth insufficient for maintaining smooth frame rates in modern titles, as the data shows a hardware ceiling around these metrics.

This card is exclusively for users with AGP 8x motherboards who cannot adopt PCI Express. The 256 MB frame buffer is adequate for older game libraries but becomes a limiting factor with increasingly large texture sets. The 16 ROPs and 16 TMUs provide a balanced workload for DirectX 9.0b (9_2) applications, which aligns with the supported API level. The 130 nm process node and 160 million transistor count suggest a mature design that performs predictably within its thermal envelope. Gamers seeking to extend the life of a legacy AGP system will find this card a functional, if not spectacular, choice, provided they temper expectations regarding resolution scaling. The card’s dual-slot cooler and 186 mm length require a case with adequate clearance, and the 1x Molex power connector demands a power supply with a spare peripheral lead.

Ray Tracing and Feature Set

The R400 architecture does not include dedicated ray tracing cores or tensor cores, as evidenced by the null values in the specification. Hardware-accelerated ray tracing is entirely absent from this product. The feature set is rooted in the DirectX 9.0b (9_2) API, which defines the shader model capabilities and rendering pipeline available to developers. OpenGL 2.1 support is present, offering compatibility with applications that rely on that API. There is no Vulkan support, meaning modern cross-platform titles that require Vulkan will not function. The absence of tensor cores also precludes any AI-accelerated features such as deep learning super sampling or neural network-based upscaling.

The practical implication is that this card operates strictly within the bounds of early 2000s rendering techniques. The 16 TMUs handle texture fetching for conventional forward rendering, while the 16 ROPs manage pixel output and depth operations. The 8.640 GTexel/s texture rate limits anisotropic filtering and complex multi-texturing scenarios. Display outputs are limited to 1x DVI, 1x VGA, and 1x S-Video, which covers standard monitors of the era but offers no support for modern high-refresh-rate or high-resolution panels beyond what DVI can provide. Users must rely on CPU-side or driver-level fallbacks for any post-processing effects that modern GPUs handle through dedicated hardware. The feature set is complete for its DirectX 9.0b era but fundamentally incompatible with contemporary rendering requirements.

How It Compares

The nearestRivals field is empty, so there are no direct competitor scores or deltaPct values to reference. The absence of comparative data means this card cannot be positioned against specific named alternatives within the database. Benchmark results indicate the card sits at the 50th percentile against all GPUs, which provides a general reference point. Without rival entries, the analysis must rely on the internal metrics. The 8.640 GPixel/s pixel rate and 37.76 GB/s bandwidth define its throughput independently. The 256 MB memory capacity is a fixed constraint that cannot be compared to larger frame buffers without specific data. The card’s predecessor and successor are listed as Radeon R300 and Radeon R500 AGP respectively, but no performance deltas are provided for those generational transitions.

The lack of rival data is notable. It suggests the database does not retain score entries for comparable AGP-era cards, or that the X850 XT Platinum AGP occupies a unique position without close benchmarks. The percentile rank remains the only external reference point. At the 50th percentile, the card performs better than half of the GPUs ever benchmarked and worse than the other half. This median placement indicates a card that was competent at launch but has been overtaken by subsequent architectures. Users should interpret the absence of rivals as a signal that the card is evaluated on its own merits, not against a peer group. The performance characteristics are what they are, and the numbers stand alone.

FAQ

Q: What DirectX version does this card support?

A: The card supports DirectX 9.0b (9_2), which is the highest API level available for this architecture.

Q: Can this card be used on a modern motherboard?

A: No, it uses the AGP 8x bus interface and will not fit into PCI Express slots.

Q: How much memory does the X850 XT Platinum AGP have?

A: It has 256 MB of GDDR3 memory on a 256-bit bus, providing a bandwidth of 37.76 GB/s.

Q: Does this card support hardware ray tracing?

A: No, there are no ray tracing cores or tensor cores present in the R400 architecture.

Q: What is the power consumption of this card?

A: The TDP is 67 W, and the suggested power supply rating is 250 W.

Q: What display outputs are available?

A: The card offers 1x DVI, 1x VGA, and 1x S-Video outputs.

Benchmark Performance

The benchmark data shows an average score of 0, which indicates no performance samples have been recorded for this card in the database. Consequently, the analysis must rely on the derived specifications. The pixel rate of 8.640 GPixel/s and texture rate of 8.640 GTexel/s are identical, indicating a balanced design where each ROP and TMU operates at the same clock frequency. The memory bandwidth of 37.76 GB/s is the throughput ceiling for texture and vertex data. With a 256-bit bus and 590 MHz memory clock, the bandwidth calculation is straightforward: 256 bits divided by 8 bytes per bit times 590 MHz times a double-data-rate factor of 2 yields 37.76 GB/s.

The 50th percentile ranking implies that half of all GPUs in the database score higher and half score lower. Without specific rival scores, the exact deltas cannot be computed. The 160 million transistors on a 297 mm² die at 130 nm yields a density of 538.7K transistors per mm², which is a characteristic of early 2000s fabrication. The card’s performance in real-world terms is bounded by the 16 ROPs for pixel fill and 16 TMUs for texture filtering. For DirectX 9.0b titles, the card can handle moderate settings at 1024x768, but the 256 MB frame buffer becomes a bottleneck with high-resolution textures. The 8.640 GTexel/s rate means that heavily textured scenes will see performance drops, as the texture units saturate before the ROPs do in many scenarios. The absence of benchmark scores means percentile comparisons are the only quantitative measure, and that measure places this card at the exact median of historical GPU performance.

Power and Cooling

The X850 XT Platinum AGP has a TDP of 67 W, which is modest for a dual-slot card. The cooling solution is a dual-slot design, meaning it occupies two expansion slots in the chassis. The card’s dimensions are 186 mm in length, 111 mm in height, and 41 mm in width, which requires careful case selection for smaller form factors. Power is delivered through a single 1x Molex connector, a standard peripheral power lead from power supplies of that era. The suggested power supply rating is 250 W, which provides a comfortable margin above the card’s TDP when accounting for the rest of the system components. Users with power supplies below 250 W should upgrade, as the data indicates this is the minimum recommended capacity.

The 67 W TDP is low enough that the dual-slot cooler is likely overbuilt for the thermal output, which may result in quieter operation under load. The 130 nm process node contributes to this moderate power draw, as does the 590 MHz memory clock. The card requires a power supply with at least one Molex connector free; adapters from SATA or other connectors are not mentioned in the specifications. The 41 mm width confirms the dual-slot occupancy, and users should verify that adjacent PCI slots are free for airflow. The 250 W PSU recommendation is a system-level figure, not just a GPU figure, so it accounts for CPU, drives, and other peripherals. The cooling and power profile is straightforward: a moderate power draw, a standard connector, and a dual-slot cooler that fits most mid-tower cases of the period.