ATI Radeon X800 GTO2

Benchmark Performance

The ATI Radeon X800 GTO2 occupies a distinctly middle-of-the-road position in the historical GPU landscape, with its 50th percentile ranking among all GPUs placing it squarely at the median of the performance distribution. This is not a card that defined the high end of its era, nor one that languished at the bottom—it simply sat in the comfortable middle ground where many mainstream buyers found themselves. The absence of benchmark scores in the data means we cannot quote specific frame rates or synthetic test numbers, but the percentile ranking tells a clear story: half of all GPUs ever tracked performed better, and half performed worse.

The X800 GTO2's performance profile is shaped by its fundamental architectural parameters. With 16 texture mapping units and 16 render output units, the card processes geometry and pixels in a balanced manner that was typical of the R400 generation. The pixel fill rate of 6.400 GPixel/s and texture fill rate of 6.400 GTexel/s indicate that the card could push a respectable number of pixels and texels per second, though these figures are identical, suggesting no asymmetric advantage in either fill or texturing workloads. For a card from this generation, that symmetry means it handled traditional 3D rendering tasks without a glaring bottleneck on either side of the pipeline.

The card's DirectX 9.0b (9_2) support is a critical limitation when viewed through a modern lens. This means the X800 GTO2 cannot execute shader model 3.0 workloads, which became standard in later DirectX 9 titles and were required for many games released after 2005. The OpenGL 2.1 support is similarly dated. Benchmark results from its era would have shown strong performance in DirectX 9.0b titles, but the architectural ceiling is real: games that demanded newer shader features would either fail to run or run with reduced visual fidelity. This is not a card for compatibility with modern libraries—it is a snapshot of a specific moment in GPU evolution.

Power and Cooling

The X800 GTO2's power requirements are modest by any standard, with a suggested power supply rating of 200 W. This is a remarkably low bar that almost any desktop power supply from the mid-2000s could clear, and even modern budget PSUs would handle it without strain. The card draws its power through a single 6-pin PCIe power connector, which was the standard auxiliary power interface for graphics cards of this era. Builders should verify their power supply has this connector available, as adapters from Molex to 6-pin were common but not universal.

The single-slot cooling design keeps the card compact and easy to install in most chassis from its time. The 130 nm process node from TSMC, with 160 million transistors on a 297 mm² die, means the chip itself was relatively large but not thermally demanding by today's standards. The transistor density of 538.7K per mm² reflects the less aggressive scaling of mid-2000s manufacturing compared to modern nodes. The card does not list a specific TDP value in the available data, so we can only note that the 200 W PSU recommendation implies a board power draw well within the capabilities of that supply rating.

The X800 GTO2 uses the PCIe 1.0 x16 bus interface, which provides ample bandwidth for its memory subsystem and avoids the AGP bottleneck that plagued earlier cards. This interface was forward-looking at launch, though later PCIe revisions offer more bandwidth. For the card's actual workloads, PCIe 1.0 x16 is more than sufficient, as the card's 31.36 GB/s memory bandwidth and 6.400 GPixel/s fill rates do not approach the interface's limits.

Memory Subsystem

The memory configuration of the X800 GTO2 consists of 256 MB of GDDR3 VRAM on a 256-bit bus, running at 490 MHz with an effective data rate of 980 Mbps. This yields a total memory bandwidth of 31.36 GB/s. The 256-bit bus width is a key enabler of this bandwidth figure—a narrower bus would require significantly higher memory clocks to achieve the same throughput. For its generation, this was a mainstream-to-upper-midrange memory configuration that allowed the card to handle 1024x768 and 1280x1024 resolutions comfortably in most DirectX 9.0b titles.

The 256 MB VRAM capacity is the primary constraint for higher resolutions. At 1600x1200 or above, texture-heavy games could exceed this capacity, forcing the card to swap textures to system memory over the PCIe bus, which would cause stuttering and reduced frame rates. The 31.36 GB/s bandwidth mitigates this somewhat by allowing quick refills of the VRAM, but it cannot fully compensate for insufficient capacity. The GDDR3 memory type was a generational improvement over the GDDR2 and DDR2 used in earlier cards, offering higher clock speeds at lower power consumption.

For the resolutions that this card realistically targets—1280x1024 and below—the memory subsystem is well balanced. The 256-bit bus ensures that texture streaming and frame buffer operations do not starve the GPU's 16 ROPs. At higher resolutions, the bandwidth becomes the limiting factor before the pixel fill rate does, as the 6.400 GPixel/s fill rate is sufficient for 1600x1200 at low to medium detail settings, but the 31.36 GB/s bandwidth is stretched thin when large textures and high resolution frame buffers are combined.

How It Compares

The data for the X800 GTO2 does not include any nearest rival entries, which limits direct comparison to specific competitor cards. However, the 50th percentile ranking provides a general reference point. This card would have competed in the same performance bracket as mid-range offerings from NVIDIA's GeForce 6 series, though without specific rival data we cannot cite exact deltas or percentage differences. The absence of rival benchmarks in the fact pack means any comparison must remain qualitative and general.

Within its own architectural family, the X800 GTO2 sits between the lower-end X800 models and the higher-clocked X800 XL or X850 variants. The 16 TMUs and 16 ROPs are identical to the X800 series standard, but the 490 MHz memory clock and 256 MB capacity position it as a slightly trimmed version of the more fully featured models. The R480 chip was the last iteration of the R400 architecture before the R500 generation succeeded it, so this card represents the mature refinement of its design.

The transition from the Radeon R300 predecessor to the R500 successor is noteworthy. The R300 generation established ATI's DirectX 9 dominance, and the R400 refined that architecture with faster clocks and improved memory efficiency. The X800 GTO2 is a late-stage R400 product that benefited from manufacturing maturation on the 130 nm process. Its end-of-life production status and 2005 release date place it at the tail end of its architectural cycle, just before the R500 generation introduced shader model 3.0 support and unified shaders.

Who Should Consider It

The X800 GTO2 is a card for a very specific use case: running DirectX 9.0b games at 1280x1024 or lower resolutions with moderate detail settings. Its 50th percentile performance ranking means it will handle older titles from the 2003-2005 era smoothly, but it will struggle with any game that requires DirectX 9.0c features or higher. Gamers who want to play the original Half-Life 2, Far Cry (with the appropriate patch), or the first Splinter Cell titles will find this card adequate. Those expecting to run later DirectX 9 games like F.E.A.R. or The Elder Scrolls IV: Oblivion will encounter compatibility issues due to the 9_2 shader model limitation.

For retro PC builders assembling a period-accurate system from the mid-2000s, the X800 GTO2 is a sensible choice that matches the performance expectations of that era. The 256 MB VRAM is sufficient for the games of its time, and the 200 W PSU requirement means it can be paired with almost any vintage power supply. The single 6-pin connector and single-slot cooler simplify installation in compact cases. The 2x DVI and 1x S-Video outputs provide flexible display connectivity for CRT monitors, which many retro gamers prefer for their superior motion clarity and native resolution support.

Users with modern displays should be cautious. The card's lack of DirectX 10 or later support, combined with its 256 MB VRAM, makes it unsuitable for any contemporary gaming. Windows 10 and 11 drivers do not support this card, so users must run an older operating system like Windows XP or a Linux distribution with legacy driver support. This is not a daily-driver card for modern workloads—it is a piece of computing history that can still deliver the experience of mid-2000s gaming when paired with appropriate software.

FAQ

Q: What DirectX version does the ATI Radeon X800 GTO2 support?

A: The card supports DirectX 9.0b, which corresponds to shader model 9_2. It does not support DirectX 9.0c or later versions, so games requiring shader model 3.0 will not run.

Q: How much VRAM does the X800 GTO2 have and is it enough for modern games?

A: It has 256 MB of GDDR3 memory. This is insufficient for modern games, which typically require at least 4 GB or more. It is only suitable for games from the card's 2005 era at lower resolutions.

Q: What power supply is recommended for this card?

A: The suggested PSU rating is 200 W. It uses a single 6-pin PCIe power connector. Most power supplies from the mid-2000s or later will have sufficient capacity.

Q: What is the memory bandwidth of the X800 GTO2?

A: The memory bandwidth is 31.36 GB/s, achieved through a 256-bit bus with GDDR3 memory running at 490 MHz (980 Mbps effective). This is adequate for 1280x1024 resolution gaming.

Q: Does this card support OpenGL?

A: Yes, it supports OpenGL 2.1. This allows it to run older OpenGL games and applications, though newer OpenGL features will not be available.

Q: What is the pixel fill rate of the X800 GTO2?

A: The pixel fill rate is 6.400 GPixel/s, and the texture fill rate is 6.400 GTexel/s. These identical figures indicate balanced pixel and texture processing capabilities.

Q: What display outputs does the X800 GTO2 have?

A: It has 2x DVI and 1x S-Video outputs. This allows connection to two digital monitors or one analog monitor via S-Video, though DVI to VGA adapters would be needed for older analog displays.

Q: When was the X800 GTO2 released and is it still in production?

A: It was released on September 14, 2005, and its production status is end-of-life. It is no longer manufactured, so it is only available on the used market.