ATI Radeon X850 PRO AGP

Memory Subsystem

The ATI Radeon X850 PRO AGP is equipped with 256 MB of GDDR3 memory, arranged across a 256-bit bus. This configuration yields a memory bandwidth of 32.00 GB/s, a figure that is modest by contemporary standards but was well-suited to the resolution targets of its era. The memory operates at 500 MHz, with an effective data rate of 1000 Mbps.

For high-resolution gaming, the 256-bit interface is the critical factor here. A narrower bus would struggle to feed the 12 ROPs and 12 TMUs, but the 32.00 GB/s of bandwidth is sufficient for 1024x768 and 1280x1024 class workloads common during its release period. At higher resolutions, such as 1600x1200, the data indicates that texture-heavy scenes would begin to strain the memory subsystem, as the pixel fill rate of 6.000 GPixel/s and the bandwidth are closely matched. The 256 MB frame buffer is also a limiting factor for large textures and anti-aliasing at elevated settings; the capacity is adequate for its generation, but it does not provide headroom for modern high-resolution asset streaming.

The GDDR3 type is a key detail — it was a relatively new memory technology at the time, offering higher clock potential than older DDR2 variants. The 256-bit bus width, combined with the 32.00 GB/s bandwidth, yields a balanced memory design that aligns with the card's overall compute capabilities. In practical terms, the memory subsystem is not the bottleneck for most workloads of its era; the shader throughput is the more likely constraint. However, for users attempting to push beyond the designed resolution envelope, the 32.00 GB/s figure will cap performance gains from overclocking the core, as the memory bus cannot deliver additional data beyond its rated throughput.

How It Compares

The X850 PRO AGP does not have direct rival data available in the benchmark database. The nearestRivals array is empty, and the percentileVsAllGpus stands at 50, indicating that this card sits exactly at the median of all GPUs tracked by the database. This percentile is a broad measure — it includes integrated graphics, older discrete parts, and much newer hardware — so a 50th percentile placement does not imply parity with any specific competitor. It simply means that half of all tracked GPUs score higher and half score lower.

Without rival names or deltaPct values, the comparison must rest on architectural positioning. The X850 PRO AGP is built on the R481 chip, using the R400 architecture, fabricated on a 130 nm process at TSMC. This places it as a late-generation AGP part, bridging the R300 and R500 families. Its predecessor is the Radeon R300, and its successor is the Radeon R500 AGP. The 160 million transistor count, on a 297 mm² die, yields a transistor density of 538.7K per mm².

The lack of direct benchmark scores (avgBenchmarkScore is 0) further complicates numerical comparison. The card's position in the database is defined by its percentile rank alone. This suggests that the X850 PRO AGP is a historically significant but performance-benchmarked product, where the aggregate data is insufficient to generate rival deltas. Users should interpret the 50th percentile as a neutral placement — it is neither a high-flying performer nor a bottom-tier part, but rather a mid-pack entry in the overall GPU landscape.

Benchmark Performance

The benchmark data for the X850 PRO AGP is sparse: the avgBenchmarkScore is 0, and the benchmarks array is empty. This means there are no aggregated scores to analyze against rivals, and no deltaPct values exist to quantify relative performance. The percentileVsAllGpus of 50 is the only quantitative performance indicator available.

A 50th percentile rank across all GPUs is a meaningful signal, despite the lack of raw scores. It implies that the card outperforms half of the database's tracked hardware, which includes a wide swath of older and integrated solutions. However, it also means that half of all GPUs — including many mid-range and high-end parts from subsequent generations — outrank it. For a card released in 2005 with end-of-life production status, this is a plausible position: it was a strong performer in its day, but time has eroded its standing relative to newer silicon.

The pixel rate of 6.000 GPixel/s and texture rate of 6.000 GTexel/s indicate that the card's fillrate capabilities are identical across both metrics, which is typical for a design with equal ROP and TMU counts (12 each). This balance suggests that the card will not show a pronounced skew between pixel-heavy and texture-heavy workloads. The absence of FP32 or FP16 throughput figures in the database means no shader-compute comparison is possible; the analysis must rely on the fillrate and memory metrics alone.

In the absence of direct rival scores, the percentile is the only comparative lens. A 50th percentile placement, combined with a zero average score, indicates that the database has not accumulated enough reputable benchmark runs to produce a statistically meaningful average. This is common for end-of-life AGP products, which are rarely tested on modern systems. The data suggests that the X850 PRO AGP should be evaluated on its architectural merits — 12 TMUs, 12 ROPs, 32.00 GB/s bandwidth — rather than on synthetic benchmark deltas that do not exist in the FACT PACK.

FAQ

Q: What is the memory configuration of the ATI Radeon X850 PRO AGP?

A: It has 256 MB of GDDR3 memory on a 256-bit bus, providing 32.00 GB/s of bandwidth at a memory clock of 500 MHz (1000 Mbps effective).

Q: How does the card perform relative to all GPUs in the database?

A: The percentileVsAllGpus is 50, meaning it sits exactly at the median — outperforming half of all tracked GPUs and trailing the other half. No rival-specific scores are available.

Q: What is the manufacturing process and die size?

A: The card uses a 130 nm process at TSMC, with a die size of 297 mm² and 160 million transistors, yielding a density of 538.7K transistors per mm².

Q: What is the peak pixel and texture fillrate?

A: The pixel rate is 6.000 GPixel/s and the texture rate is 6.000 GTexel/s, both driven by 12 ROPs and 12 TMUs respectively.

Q: Does the card support modern graphics APIs?

A: It supports DirectX 9.0b (9_2) and OpenGL 2.1. It does not support Vulkan, and no ray tracing or tensor core data is available.

Q: What is the production status and release date?

A: The production status is end-of-life, and the release date was September 3, 2005. The launch MSRP was 279 USD.

Ray Tracing and Feature Set

The X850 PRO AGP predates ray tracing hardware by more than a decade. The FACT PACK lists no RT cores and no tensor cores, which means the card has no dedicated hardware for ray-traced effects or AI-accelerated workloads. Any ray tracing would be entirely software-based, and the DirectX 9.0b (9_2) API does not include ray tracing support. The OpenGL 2.1 implementation is also too old for modern RT extensions.

The feature set is defined by its R400 architecture. The card has 12 TMUs and 12 ROPs, which handle texture fetches and pixel output respectively. The pixel rate of 6.000 GPixel/s and texture rate of 6.000 GTexel/s are the primary throughput figures. The absence of shading unit data (shadingUnits is null) means the shader core count is not specified, but the R400 generation typically used a unified shader approach for its time. The card supports DirectX 9.0b, which includes pixel shader 2.0 and vertex shader 2.0 capabilities, but not the later 3.0 specification.

Display outputs are limited to 1x DVI, 1x VGA, and 1x S-Video, reflecting the connectivity standards of the mid-2000s. The bus interface is AGP 8x, which is the final evolution of the AGP standard before PCIe became dominant. The power requirements are modest: a single Molex connector and a suggested PSU of 200 W. The card is single-slot, fitting into standard AGP motherboards of the era.

For modern feature expectations, the X850 PRO AGP is severely limited. It cannot run Vulkan (no support), and its DirectX 9.0b version is below the 9.0c that many later titles required. The feature set is firmly anchored in 2005-era gaming, with no path forward for contemporary graphics effects. Users should not expect hardware-accelerated ray tracing, DLSS-style upscaling, or any compute-heavy AI features.

Who Should Consider It

The X850 PRO AGP is a historical product, and its recommendation profile is narrow. Given its 50th percentile standing and the absence of benchmark scores, it is not a viable option for modern gaming at any resolution. The DirectX 9.0b API support limits it to games from roughly 2004-2005, and even then, only those that do not require DirectX 9.0c features. The 256 MB frame buffer and 32.00 GB/s bandwidth will handle 1024x768 at medium settings in era-appropriate titles, but high-resolution textures or anti-aliasing will quickly exhaust the memory.

Collectors and retro-build enthusiasts are the primary audience. The card's AGP 8x interface makes it a candidate for vintage motherboards that lack PCIe slots. For such systems, the X850 PRO AGP offers a significant upgrade over integrated graphics or early R300-based cards. The 6.000 GPixel/s fillrate and 12 ROPs provide smooth performance for late-AGP-era games at their native resolutions. The single-slot design and 200 W PSU requirement make it easy to install in older cases with modest power supplies.

The card is not suitable for high-resolution gaming. At 1600x1200, the 32.00 GB/s memory bandwidth will become a bottleneck, and the 256 MB VRAM cannot hold the larger textures that such resolutions demand. Even at 1280x1024, users should expect to reduce texture quality and disable anti-aliasing. The 50th percentile rank underscores this: half of all GPUs, including many integrated solutions from later years, outperform it. For any practical modern use, the X850 PRO AGP is outclassed.

The absence of modern API support (no Vulkan, DirectX 9.0b only) further restricts the card to a very specific software library. Owners should target games released between 2003 and 2005, particularly titles optimized for AGP-era hardware. The card's equal pixel and texture rates (both 6.000) make it well-balanced for games that use a mix of fillrate and texture-heavy effects, but it will not excel at either extreme. In summary, this is a card for preservation and retro gaming, not for current-generation titles or high refresh-rate displays.