AMD Radeon Instinct MI250X vs AMD Radeon Sky 900
Graphics Processor
| GPU model | Aldebaran | Tahiti |
|---|---|---|
| GPU variant | Aldebaran XT | Orthrus |
| Architecture | CDNA 2.0 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 6 nm | 28 nm |
| Number of transistors | 58,200 million | 4,313 million |
| Die size | unknown | 352 mm² |
Graphics Card
| Release date | Nov 8th, 2021 | Mar 27th, 2013 |
|---|---|---|
| Generation | Radeon Instinct | Radeon Sky |
| Production | unknown | End-of-life |
| Interface | PCIe 4.0 x16 | PCIe 3.0 x16 |
Clocks
| Base clock | 1000 MHz | 825 MHz |
|---|---|---|
| Boost clock | 1700 MHz | 950 MHz |
| Memory clock | 1600 MHz 3.2 Gbps effective | 1250 MHz 5 Gbps effective |
Memory Configuration
| Memory size | 128 GB | 3 GB |
|---|---|---|
| Memory type | HBM2E | GDDR5 |
| Memory bus width | 8192 bit | 384 bit |
| Bandwidth | 3,277 GB/s | 240.0 GB/s |
Render Configuration
| Shading units | 14080 | 1792 |
|---|---|---|
| TMUs | 880 | 112 |
| ROPs | 0 | 32 |
| Compute units | 220 | 28 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 16 MB | 768 KB |
| gpu.details.mcm | 2 | — |
Performance
| Pixel rate | 0 MPixel/s | 30.40 GPixel/s |
|---|---|---|
| Texture rate | 1,496 GTexel/s | 106.4 GTexel/s |
| FP16 (half) performance | 383.0 TFLOPS (8:1) | — |
| FP32 (float) performance | 47.87 TFLOPS | 3.405 TFLOPS |
| FP64 (double) performance | 47.87 TFLOPS (1:1) | 851.2 GFLOPS (1:4) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 267 mm 10.5 inches | 305 mm 12 inches |
| Width | 111 mm 4.4 inches | 111 mm 4.4 inches |
| TDP | 500 W | 300 W |
| Suggested PSU | 900 W | 700 W |
| Outputs | No outputs | 1x DVI1x mini-DisplayPort |
| Power connectors | 2x 8-pin | 2x 8-pin |
| Board number | — | C476 |
API Support & Features
| DirectX | — | 12 (11_1) |
|---|---|---|
| OpenGL | — | 4.6 |
| OpenCL | 3.0 | 1.2 |
| Vulkan | — | 1.2 |
| Shader model | — | 5.1 |
