Radeon Instinct MI300X vs RX 6900 XTX
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | RDNA 2.0 (2020−2024) | CDNA 3.0 (2023−2024) |
| GPU code name | Navi 21 | Aqua Vanjaram |
| Market segment | Desktop | Workstation |
| Release date | 28 October 2020 (4 years ago) | 6 December 2023 (less than a year 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 | 5120 | 19456 |
| Core clock speed | 2075 MHz | 1000 MHz |
| Boost clock speed | 2435 MHz | 2100 MHz |
| Number of transistors | 26,800 million | 153,000 million |
| Manufacturing process technology | 7 nm | 5 nm |
| Power consumption (TDP) | 330 Watt | 750 Watt |
| Texture fill rate | 779.2 | 2,554 |
| Floating-point processing power | 24.93 TFLOPS | 81.72 TFLOPS |
| ROPs | 128 | no data |
| TMUs | 320 | 1216 |
| Tensor Cores | no data | 1216 |
| Ray Tracing Cores | 80 | 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 5.0 x16 |
| Length | 267 mm | no data |
| Width | 2-slot | OAM Module |
| Supplementary power connectors | 2x 8-pin | None |
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 | HBM3 |
| Maximum RAM amount | 16 GB | 192 GB |
| Memory bus width | 256 Bit | 8192 Bit |
| Memory clock speed | 2250 MHz | 2525 MHz |
| Memory bandwidth | 576.0 GB/s | 5,171 GB/s |
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 | No outputs |
| HDMI | + | - |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 Ultimate (12_2) | N/A |
| Shader Model | 6.7 | N/A |
| OpenGL | 4.6 | N/A |
| OpenCL | 2.1 | 3.0 |
| Vulkan | 1.3 | N/A |
Pros & cons summary
| Recency | 28 October 2020 | 6 December 2023 |
| Maximum RAM amount | 16 GB | 192 GB |
| Chip lithography | 7 nm | 5 nm |
| Power consumption (TDP) | 330 Watt | 750 Watt |
RX 6900 XTX has 127.3% lower power consumption.
Instinct MI300X, on the other hand, has an age advantage of 3 years, a 1100% higher maximum VRAM amount, and a 40% more advanced lithography process.
We couldn't decide between Radeon RX 6900 XTX and Radeon Instinct MI300X. We've got no test results to judge.
Be aware that Radeon RX 6900 XTX is a desktop card while Radeon Instinct MI300X is a workstation 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.
