AMD Radeon HD 8970M vs AMD Radeon R9 M390X
Processeur graphique
| Nom du GPU | Neptune | Amethyst |
|---|---|---|
| GPU variant | Neptune XT (216-0847000) | Amethyst XT |
| Architecture | GCN 1.0 | GCN 3.0 |
| Fonderie | TSMC | TSMC |
| Taille du processus | 28 nm | 28 nm |
| Transistors | 2,800 million | 5,000 million |
| Taille des matrices | 212 mm² | 366 mm² |
Graphiques mobiles
| Date de publication | May 14th, 2013 | May 5th, 2015 |
|---|---|---|
| Génération | Solar System (HD 8900M) | Crystal System (R9 M300) |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Prédécesseur | London | Solar System |
| Successeur | Crystal System | Mobility Radeon |
Vitesse clock
| Base clock | 850 MHz | — |
|---|---|---|
| Boost clock | 900 MHz | — |
| Mémoire clock | 1200 MHz 4.8 Gbps effective | 1250 MHz 5 Gbps effective |
| GPU clock | — | 723 MHz |
Mémoire
| Taille de la mémoire | 4 GB | 4 GB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR5 |
| Bus mémoire | 256 bit | 256 bit |
| Bande passante | 153.6 GB/s | 160.0 GB/s |
Render Config
| Shading units | 1280 | 2048 |
|---|---|---|
| TMUs | 80 | 128 |
| ROPs | 32 | 32 |
| Compute units | 20 | 32 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 512 KB |
Performance théorique
| Taux de pixel | 28.80 GPixel/s | 23.14 GPixel/s |
|---|---|---|
| Taux de texture | 72.00 GTexel/s | 92.54 GTexel/s |
| FP32 (float) performance | 2.304 TFLOPS | 2.961 TFLOPS |
| FP64 (double) performance | 144.0 GFLOPS (1:16) | 185.1 GFLOPS (1:16) |
| FP16 (half) performance | — | 2.961 TFLOPS (1:1) |
Board Design
| Taille Slot | MXM Module | MXM Module |
|---|---|---|
| TDP | 100 W | 75 W |
| Sorties | No outputs | No outputs |
| Connecteurs de puissance | — | None |
| Board number | — | C608 |
Caractéristiques graphiques
| DirectX | 12 (11_1) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 6.3 |
