AMD Radeon HD 7870 XT vs AMD Radeon RX 470
Processeur graphique
| Nom du GPU | Tahiti | Ellesmere |
|---|---|---|
| GPU variant | Tahiti LE (215-0821122) | Polaris 10 PRO (215-0876204) |
| Architecture | GCN 1.0 | GCN 4.0 |
| Fonderie | TSMC | GlobalFoundries |
| Taille du processus | 28 nm | 14 nm |
| Transistors | 4,313 million | 5,700 million |
| Taille des matrices | 352 mm² | 232 mm² |
Carte graphique
| Date de publication | Nov 19th, 2012 | Aug 4th, 2016 |
|---|---|---|
| Génération | Southern Islands | Arctic Islands |
| Production | End-of-life | Active |
| Prix de lancement | 270 USD | 179 USD |
| Bus interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Critiques | 95 in our database | 46 in our database |
| Prédécesseur | Northern Islands | Pirate Islands |
| Successeur | Sea Islands | Polaris |
Vitesse clock
| Base clock | 925 MHz | 926 MHz |
|---|---|---|
| Boost clock | 975 MHz | 1206 MHz |
| Mémoire clock | 1500 MHz 6 Gbps effective | 1650 MHz 6.6 Gbps effective |
Mémoire
| Taille de la mémoire | 2 GB | 4 GB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR5 |
| Bus mémoire | 256 bit | 256 bit |
| Bande passante | 192.0 GB/s | 211.2 GB/s |
Render Config
| Shading units | 1536 | 2048 |
|---|---|---|
| TMUs | 96 | 128 |
| ROPs | 32 | 32 |
| Compute units | 24 | 32 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 2 MB |
Performance théorique
| Taux de pixel | 31.20 GPixel/s | 38.59 GPixel/s |
|---|---|---|
| Taux de texture | 93.60 GTexel/s | 154.4 GTexel/s |
| FP32 (float) performance | 2.995 TFLOPS | 4.940 TFLOPS |
| FP64 (double) performance | 748.8 GFLOPS (1:4) | 308.7 GFLOPS (1:16) |
| FP16 (half) performance | — | 4.940 TFLOPS (1:1) |
Board Design
| Taille Slot | Dual-slot | Dual-slot |
|---|---|---|
| Longueur | 267 mm 10.5 inches | 240 mm 9.4 inches |
| TDP | 185 W | 120 W |
| Suggestions pour le PSU | 450 W | 300 W |
| Sorties | 1x DVI1x HDMI2x mini-DisplayPort | 1x HDMI3x DisplayPort |
| Connecteurs de puissance | 2x 6-pin | 1x 6-pin |
| Board number | C474 | C940, D000-03, D009-07 |
| Taille | — | 95 mm 3.7 inches |
| Taille | — | 35 mm 1.4 inches |
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 |
