AMD Radeon HD 7870M vs AMD Radeon RX 550X Mobile
Processeur graphique
| Nom du GPU | Heathrow | Polaris 23 |
|---|---|---|
| GPU variant | Heathrow XT (216-0835033) | Polaris 23 MXT |
| Architecture | GCN 1.0 | GCN 4.0 |
| Fonderie | TSMC | GlobalFoundries |
| Taille du processus | 28 nm | 14 nm |
| Transistors | 1,500 million | 2,200 million |
| Taille des matrices | 123 mm² | 103 mm² |
Graphiques mobiles
| Date de publication | Apr 24th, 2012 | Apr 11th, 2018 |
|---|---|---|
| Génération | London (HD 7800M) | Mobility Radeon (RX M500X) |
| Production | End-of-life | Active |
| Bus interface | PCIe 3.0 x16 | PCIe 3.0 x8 |
| Prédécesseur | Vancouver | Crystal System |
| Successeur | Solar System | — |
Vitesse clock
| GPU clock | 800 MHz | — |
|---|---|---|
| Mémoire clock | 1000 MHz 4 Gbps effective | 1500 MHz 6 Gbps effective |
| Base clock | — | 1100 MHz |
| Boost clock | — | 1176 MHz |
Mémoire
| Taille de la mémoire | 2 GB | 2 GB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR5 |
| Bus mémoire | 128 bit | 64 bit |
| Bande passante | 64.00 GB/s | 48.00 GB/s |
Render Config
| Shading units | 640 | 640 |
|---|---|---|
| TMUs | 40 | 40 |
| ROPs | 16 | 16 |
| Compute units | 10 | 10 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 512 KB |
Performance théorique
| Taux de pixel | 12.80 GPixel/s | 18.82 GPixel/s |
|---|---|---|
| Taux de texture | 32.00 GTexel/s | 47.04 GTexel/s |
| FP32 (float) performance | 1,024 GFLOPS | 1.505 TFLOPS |
| FP64 (double) performance | 64.00 GFLOPS (1:16) | 94.08 GFLOPS (1:16) |
| FP16 (half) performance | — | 1.505 TFLOPS (1:1) |
Board Design
| TDP | 45 W | 50 W |
|---|---|---|
| Sorties | No outputs | No outputs |
| Taille Slot | — | IGP |
| Connecteurs de puissance | — | None |
Caractéristiques graphiques
| DirectX | 12 (11_1) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 6.4 |
