Radeon RX 6900 XTX vs Pro 555X
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 500 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 7.73 | no data |
| Architecture | GCN 4.0 (2016−2020) | RDNA 2.0 (2020−2024) |
| GPU code name | Polaris 21 | Navi 21 |
| Market segment | Mobile workstation | Desktop |
| Release date | 16 July 2018 (6 years ago) | 28 October 2020 (4 years ago) |
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 | 768 | 5120 |
| Core clock speed | 907 MHz | 2075 MHz |
| Boost clock speed | no data | 2435 MHz |
| Number of transistors | 3,000 million | 26,800 million |
| Manufacturing process technology | 14 nm | 7 nm |
| Power consumption (TDP) | 75 Watt | 330 Watt |
| Texture fill rate | 43.54 | 779.2 |
| Floating-point processing power | 1.393 TFLOPS | 24.93 TFLOPS |
| ROPs | 16 | 128 |
| TMUs | 48 | 320 |
| Ray Tracing Cores | no data | 80 |
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).
| Laptop size | large | no data |
| Interface | PCIe 3.0 x8 | PCIe 4.0 x16 |
| Length | no data | 267 mm |
| Width | no data | 2-slot |
| Supplementary power connectors | None | 2x 8-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 | GDDR5 | GDDR6 |
| Maximum RAM amount | 4 GB | 16 GB |
| Memory bus width | 128 Bit | 256 Bit |
| Memory clock speed | 1275 MHz | 2250 MHz |
| Memory bandwidth | 81.6 GB/s | 576.0 GB/s |
| Shared memory | - | - |
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 | No outputs | 1x HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C |
| HDMI | - | + |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| FreeSync | + | - |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 12 Ultimate (12_2) |
| Shader Model | 6.4 | 6.7 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 2.1 |
| Vulkan | 1.2.131 | 1.3 |
Pros & cons summary
| Recency | 16 July 2018 | 28 October 2020 |
| Maximum RAM amount | 4 GB | 16 GB |
| Chip lithography | 14 nm | 7 nm |
| Power consumption (TDP) | 75 Watt | 330 Watt |
Pro 555X has 340% lower power consumption.
RX 6900 XTX, on the other hand, has an age advantage of 2 years, a 300% higher maximum VRAM amount, and a 100% more advanced lithography process.
We couldn't decide between Radeon Pro 555X and Radeon RX 6900 XTX. We've got no test results to judge.
Be aware that Radeon Pro 555X is a mobile workstation card while Radeon RX 6900 XTX is a desktop one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
