ATI Radeon HD 2900 XTX vs GeForce 8400 GS
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1256 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 0.69 | no data |
| Architecture | Tesla (2006−2010) | TeraScale (2005−2013) |
| GPU code name | G86 | R600 |
| Market segment | Desktop | Desktop |
| Release date | 17 April 2007 (17 years ago) | no data |
| Launch price (MSRP) | $29.99 | no data |
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 | 16 | 320 |
| Core clock speed | 459 MHz | 743 MHz |
| Number of transistors | 210 million | 720 million |
| Manufacturing process technology | 80 nm | 80 nm |
| Power consumption (TDP) | 40 Watt | 240 Watt |
| Texture fill rate | 3.672 | 11.89 |
| Floating-point processing power | 0.02938 TFLOPS | no data |
| ROPs | 4 | 16 |
| TMUs | 8 | 16 |
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 | PCIe 1.0 x16 | PCIe 1.0 x16 |
| Length | 170 mm | 315 mm |
| Width | 1-slot | 2-slot |
| Supplementary power connectors | None | 2x 6-pin |
| SLI options | + | - |
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 | DDR2 | GDDR3 |
| Maximum RAM amount | 256 MB | 512 MB |
| Standard memory config per GPU | 256 MB | no data |
| Memory bus width | 64 Bit | 512 Bit |
| Memory clock speed | 400 MHz | 1656 MBps |
| Memory bandwidth | 6.4 GB/s | 106.0 GB/s |
Connectivity and outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 1x DVI, 1x VGA, 1x S-Video | 2x DVI, 1x S-Video |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11.1 (10_0) | 10.0 (10_0) |
| Shader Model | 4.0 | 4.0 |
| OpenGL | 2.1 | 3.3 (full) 4.0 (partial) |
| OpenCL | 1.1 | N/A |
| Vulkan | N/A | N/A |
| CUDA | 1.1 | - |
Pros & cons summary
| Maximum RAM amount | 256 MB | 512 MB |
| Power consumption (TDP) | 40 Watt | 240 Watt |
8400 GS has 500% lower power consumption.
ATI HD 2900 XTX, on the other hand, has a 100% higher maximum VRAM amount.
We couldn't decide between GeForce 8400 GS and Radeon HD 2900 XTX. We've got no test results to judge.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
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