GeForce RTX 4090 Mobile vs Radeon RX 6900 XTX
Primary Details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | not rated | 39 |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | RDNA 2.0 (2020−2022) | Ada Lovelace |
| GPU code name | Navi 21 | GN21-X11 |
| Market segment | Desktop | Laptop |
| Release date | 28 October 2020 (3 years ago) | 3 January 2023 (1 year ago) |
Detailed Specifications
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 5120 | 9728 |
| Boost clock speed | 2435 MHz | 2040 MHz |
| Number of transistors | 26,800 million | 45,900 million |
| Manufacturing process technology | 7 nm | 5 nm |
| Power consumption (TDP) | 330 Watt | 150 Watt (80 - 150 Watt TGP) |
| Texture fill rate | 779.2 | 515.3 |
Form Factor & Compatibility
Information on Radeon RX 6900 XTX and GeForce RTX 4090 Mobile compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.
| Laptop size | no data | large |
| Interface | PCIe 4.0 x16 | PCIe 4.0 x16 |
| Length | 267 mm | no data |
| Width | 2-slot | no data |
| Supplementary power connectors | 2x 8-pin | no data |
| Memory type | GDDR6 | GDDR6 |
| Maximum RAM amount | 16 GB | 16 GB |
| Memory bus width | 256 Bit | 256 Bit |
| Memory clock speed | 18 GB/s | 20000 MHz |
| Memory bandwidth | 576.0 GB/s | 576.0 GB/s |
| Shared memory | no data | - |
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 HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C | Portable Device Dependent |
| HDMI | + | no data |
API Compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 12 Ultimate (12_2) | 12 Ultimate (12_2) |
| Shader Model | 6.7 | 6.7 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 3.0 |
| Vulkan | 1.3 | 1.3 |
| CUDA | no data | 8.9 |
Pros & Cons Summary
| Recency | 28 October 2020 | 3 January 2023 |
| Chip lithography | 7 nm | 5 nm |
| Power consumption (TDP) | 330 Watt | 150 Watt |
We couldn't decide between Radeon RX 6900 XTX and GeForce RTX 4090 Mobile. We've got no test results to judge.
Be aware that Radeon RX 6900 XTX is a desktop card while GeForce RTX 4090 Mobile is a notebook one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
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