ATI Radeon HD 2900 GT vs GeForce 6800 XT
Aggregate performance score
We've compared GeForce 6800 XT and Radeon HD 2900 GT, covering specs and all relevant benchmarks.
HD 2900 outperforms 6800 XT by a whopping 141% based on our aggregate benchmark results.
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1401 | 1230 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 0.36 |
| Architecture | Curie (2003−2013) | TeraScale (2005−2013) |
| GPU code name | NV42 | R600 |
| Market segment | Desktop | Desktop |
| Release date | 30 September 2005 (20 years ago) | 6 November 2007 (18 years ago) |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | no data | 240 |
| Core clock speed | 450 MHz | 601 MHz |
| Number of transistors | 202 million | 720 million |
| Manufacturing process technology | 110 nm | 80 nm |
| Power consumption (TDP) | no data | 150 Watt |
| Texture fill rate | 5.400 | 7.212 |
| Floating-point processing power | no data | 0.2885 TFLOPS |
| ROPs | 8 | 12 |
| TMUs | 12 | 12 |
| L2 Cache | no data | 128 KB |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | AGP 8x | PCIe 1.0 x16 |
| Width | 1-slot | 2-slot |
| Supplementary power connectors | 1x Molex | 1x 8-pin |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR3 | GDDR3 |
| Maximum RAM amount | 256 MB | 256 MB |
| Memory bus width | 256 Bit | 256 Bit |
| Memory clock speed | 600 MHz | 800 MHz |
| Memory bandwidth | 38.4 GB/s | 51.2 GB/s |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 1x DVI, 1x VGA, 1x S-Video | 2x DVI, 1x S-Video |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 9.0c (9_3) | 10.0 (10_0) |
| Shader Model | 3.0 | 4.0 |
| OpenGL | 2.0 (full) 2.1 (partial) | 3.3 |
| OpenCL | N/A | N/A |
| Vulkan | N/A | N/A |
Synthetic benchmarks
Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark score.
Passmark
This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Pros & cons summary
| Performance score | 0.29 | 0.70 |
| Recency | 30 September 2005 | 6 November 2007 |
| Chip lithography | 110 nm | 80 nm |
ATI HD 2900 GT has a 141% higher aggregate performance score, an age advantage of 2 years, and a 38% more advanced lithography process.
The Radeon HD 2900 GT is our recommended choice as it beats the GeForce 6800 XT in performance tests.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
