Rubin Ultra GPU vs Radeon RX 6900
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 35 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 19.40 | no data |
| Architecture | RDNA 2.0 (2020−2025) | Rubin Ultra (2027) |
| GPU code name | Navi 21 | GR110 |
| Market segment | Desktop | Workstation |
| Release date | 28 October 2020 (5 years ago) | 2027 |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Real power consumption of some graphics cards can well exceed their nominal TDP, especially if overclocked.
| Pipelines / CUDA cores | 4608 | 57344 |
| Core clock speed | no data | 700 MHz |
| Boost clock speed | 2105 MHz | 2267 MHz |
| Number of transistors | 23,000 million | 670,000 million |
| Manufacturing process technology | 7 nm | 3 nm |
| Power consumption (TDP) | 255 Watt | 3600 Watt |
| Texture fill rate | 606.2 | 4,062.5 |
| Floating-point processing power | 19.4 TFLOPS | 260 TFLOPS |
| ROPs | 64 | 24 |
| TMUs | 288 | 1792 |
| Tensor Cores | no data | 1792 |
| L1 Cache | no data | 112 MB |
| L2 Cache | no data | 128 MB |
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 6.0 x16 |
| Width | 2-slot | SXM Module |
| Supplementary power connectors | 2x 8-pin | no data |
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 | HBM4e |
| Maximum RAM amount | 16 GB | 1024 GB |
| Memory bus width | 256 Bit | 32768 Bit |
| Memory clock speed | 16 GB/s | 1900 MHz |
| Memory bandwidth | 512.0 GB/s | 31.1 TB/s |
| 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, 2x DisplayPort, 1x USB Type-C | No outputs |
| HDMI | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 Ultimate (12_2) | N/A |
| Shader Model | 6.5 | N/A |
| OpenGL | 4.6 | N/A |
| OpenCL | 2.0 | 3.0 |
| Vulkan | 1.2 | N/A |
| CUDA | - | 10.7 |
| DLSS | - | + |
Pros & cons summary
| Maximum RAM amount | 16 GB | 1024 GB |
| Chip lithography | 7 nm | 3 nm |
| Power consumption (TDP) | 255 Watt | 3600 Watt |
RX 6900 has 1312% lower power consumption.
Rubin Ultra GPU, on the other hand, has a 6300% higher maximum VRAM amount, and a 133% more advanced lithography process.
We couldn't decide between Radeon RX 6900 and Rubin Ultra GPU. We've got no test results to judge.
Be aware that Radeon RX 6900 is a desktop graphics card while Rubin Ultra GPU is a workstation one.
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