ATI Radeon HD 2900 XTX vs RX 6900 XT
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 36 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 29.53 | no data |
| Power efficiency | 16.36 | no data |
| Architecture | RDNA 2.0 (2020−2025) | TeraScale (2005−2013) |
| GPU code name | Navi 21 | R600 |
| Market segment | Desktop | Desktop |
| Release date | 28 October 2020 (5 years ago) | no data |
| Launch price (MSRP) | $999 | no data |
Cost-effectiveness evaluation
The higher the ratio, the better. We use the manufacturer's recommended prices.
Performance to price scatter graph
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 | 5120 | 320 |
| Core clock speed | 1825 MHz | 743 MHz |
| Boost clock speed | 2250 MHz | no data |
| Number of transistors | 26,800 million | 720 million |
| Manufacturing process technology | 7 nm | 80 nm |
| Power consumption (TDP) | 300 Watt | 240 Watt |
| Texture fill rate | 720.0 | 11.89 |
| Floating-point processing power | 23.04 TFLOPS | no data |
| ROPs | 128 | 16 |
| TMUs | 320 | 16 |
| Ray Tracing Cores | 80 | no data |
| L0 Cache | 1.3 MB | no data |
| L1 Cache | 1 MB | no data |
| L2 Cache | 4 MB | no data |
| L3 Cache | 128 MB | no data |
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 4.0 x16 | PCIe 1.0 x16 |
| Length | 267 mm | 315 mm |
| Width | 3-slot | 2-slot |
| Supplementary power connectors | 2x 8-pin | 2x 6-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 | GDDR6 | GDDR3 |
| Maximum RAM amount | 16 GB | 512 MB |
| Memory bus width | 256 Bit | 512 Bit |
| Memory clock speed | 2000 MHz | 1656 MBps |
| Memory bandwidth | 512.0 GB/s | 106.0 GB/s |
| Shared memory | - | - |
| Resizable BAR | + | - |
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 HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C | 2x DVI, 1x S-Video |
| HDMI | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 Ultimate (12_2) | 10.0 (10_0) |
| Shader Model | 6.8 | 4.0 |
| OpenGL | 4.6 | 3.3 (full) 4.0 (partial) |
| OpenCL | 2.1 | N/A |
| Vulkan | 1.3 | N/A |
Pros & cons summary
| Maximum RAM amount | 16 GB | 512 MB |
| Chip lithography | 7 nm | 80 nm |
| Power consumption (TDP) | 300 Watt | 240 Watt |
RX 6900 XT has a 3100% higher maximum VRAM amount, and a 1042.9% more advanced lithography process.
ATI HD 2900 XTX, on the other hand, has 25% lower power consumption.
We couldn't decide between Radeon RX 6900 XT and Radeon HD 2900 XTX. We've got no test results to judge.
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