Product Compare
AMD Radeon Instinct MI455X vs AMD Instinct MI300A
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Jul 2026 | Dec 2023 |
| Generation | Radeon Instinct | Radeon Instinct |
| Type | Desktop | Professional |
| Bus Interface | PCIe 6.0 x16 | PCIe 5.0 x16 |
| Clock Speeds | ||
| Base Clock | 1000 MHz | 1000 MHz |
| Boost Clock | 2400 MHz | 2100 MHz |
| Memory Clock | 1900 MHz | 1300 MHz |
| Memory | ||
| Memory Size | 432GB | 128GB |
| Memory Type | HBM4 | HBM3 |
| Memory Bus | 24576bit | 8192bit |
| Bandwidth | 23.3TB/s | 5.32TB/s |
| Render Config | ||
| Compute Units | 256 | 228 |
| Shading Units | 32768 | 14592 |
| TMUs | 1024 | 912 |
| ROPs | 0 | 0 |
| L1 Cache | 32 KB (per CU) | 16 KB (per CU) |
| L2 Cache | 192 MB | 16 MB |
| L3 Cache | 256 MB | |
| Theoretical Performance | ||
| Pixel Rate | 0 MPixel/s | 0 MPixel/s |
| Texture Rate | 2457.6 GTexel/s | 1915.2 GTexel/s |
| FP16 (half) | 157.3 TFLOPS | 653.7 TFLOPS |
| FP32 (float) | 157.3 TFLOPS | 61.29 TFLOPS |
| FP64 (double) | 2.458 TFLOPS | 30.64 TFLOPS |
| Graphics Processor | ||
| GPU Name | MI450 256CU | Aqua Vanjaram |
| Architecture | CDNA 5.0 | CDNA 3.0 |
| Foundry | TSMC | TSMC |
| Process Size | 2 nm | 5 nm |
| Transistors | 320 billion | 153 billion |
| Die Size | Unknown | 1017 mm² |
| Board Design | ||
| TDP | 2300W | 750W |
| Suggested PSU | 2700 W | 1150 W |
| Outputs | No outputs | No outputs |
| Power Connectors | None | None |
| Graphics Features | ||
| DirectX | N/A | N/A |
| OpenGL | N/A | N/A |
| OpenCL | 3.0 | 3.0 |
| Vulkan | N/A | N/A |
| Shader Model | N/A | N/A |