Radeon RX 6900: specs and benchmarks
Aggregate performance score
Radeon RX 6900 provides good gaming and benchmark performance at 69.52% of a leader's which is GeForce RTX 4090.
Summary
AMD started Radeon RX 6900 sales 28 October 2020. This is a high-end RDNA 2.0 architecture desktop card based on 7 nm manufacturing process and primarily aimed at gamers. 16 GB of GDDR6 memory clocked at 16 GB/s are supplied, and together with 256 Bit memory interface this creates a bandwidth of 512.0 GB/s.
Compatibility-wise, this is a dual-slot graphics card attached via PCIe 4.0 x16 interface. Two 8-pin power connectors are required, and power consumption is at 255 Watt.
Primary details
Some basic facts about Radeon RX 6900: architecture, market segment, release date etc.
| Place in the ranking | 22 | |
| Place by popularity | not in top-100 | |
| Power efficiency | 6.20 | of 100.00 (GeForce GTX 675M SLI) |
| Architecture | RDNA 2.0 (2020−2024) | |
| GPU code name | Navi 21 | |
| Market segment | Desktop | |
| Release date | 28 October 2020 (3 years ago) |
Detailed specifications
Radeon RX 6900's specs such as number of shaders, GPU base clock, manufacturing process, texturing and calculation speed. These parameters indirectly speak of Radeon RX 6900's performance, but for precise assessment you have to consider its benchmark and gaming test results.
| Pipelines / CUDA cores | 4608 | of 21760 (GeForce RTX 5090) |
| Boost clock speed | 2105 MHz | of 3599 MHz (Radeon RX 7990 XTX) |
| Number of transistors | 23,000 million | of 208,000 million (B200 SXM 192 GB) |
| Manufacturing process technology | 7 nm | of 4 nm (H100 PCIe) |
| Power consumption (TDP) | 255 Watt | of 2400 Watt (Data Center GPU Max Subsystem) |
| Texture fill rate | 606.2 | of 2,554 (Radeon Instinct MI300X) |
| Floating-point processing power | 19.4 TFLOPS | of 109.7 (GeForce RTX 5090) |
| ROPs | 64 | of 192 (GA100) |
| TMUs | 288 | of 1280 (Data Center GPU Max NEXT) |
Form factor & compatibility
This section provides details about the physical dimensions of Radeon RX 6900 and its compatibility with other computer components. This information is useful when selecting a computer configuration or upgrading an existing one. For desktop graphics cards, it includes details about the interface and bus (for motherboard compatibility) and additional power connectors (for power supply compatibility).
| Interface | PCIe 4.0 x16 | |
| Width | 2-slot | |
| Supplementary power connectors | 2x 8-pin |
VRAM capacity and type
Parameters of memory installed on Radeon RX 6900: its type, size, bus, clock and resulting bandwidth. Note that GPUs integrated into processors have no dedicated memory and use a shared part of system RAM instead.
| Memory type | GDDR6 | |
| Maximum RAM amount | 16 GB | of 294912 (Radeon Instinct MI325X) |
| Memory bus width | 256 Bit | of 8192 Bit (Radeon Instinct MI250X) |
| Memory clock speed | 16 GB/s | of 20000 (RTX 5000 Ada Generation Mobile) |
| Memory bandwidth | 512.0 GB/s | of 5,171 GB/s (Radeon Instinct MI300X) |
Connectivity and outputs
Types and number of video connectors present on Radeon RX 6900. As a rule, this section is relevant only for desktop reference graphics cards, since for notebook ones the availability of certain video outputs depends on the laptop model, while non-reference desktop models can (though not necessarily will) bear a different set of video ports.
| Display Connectors | 1x HDMI, 2x DisplayPort, 1x USB Type-C | |
| HDMI | + |
API compatibility
APIs supported by Radeon RX 6900, sometimes including their particular versions.
| DirectX | 12 Ultimate (12_2) | |
| Shader Model | 6.5 | |
| OpenGL | 4.6 | |
| OpenCL | 2.0 | |
| Vulkan | 1.2 |
Benchmark performance
Synthetic benchmark performance of Radeon RX 6900. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
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.
Send your test results of Radeon RX 6900.
NVIDIA equivalent
According to our data, the closest NVIDIA alternative to Radeon RX 6900 is RTX 6000 Ada, which is faster by 4% and higher by 7 positions in our ranking.
Here are some closest NVIDIA rivals to Radeon RX 6900:
Similar GPUs
Here is our recommendation of several graphics cards that are more or less close in performance to the one reviewed.
Recommended processors
These processors are most commonly used with Radeon RX 6900 according to our statistics.
