AMD Radeon HD 6870 vs AMD Radeon R9 280
Processeur graphique
| Nom du GPU | Barts | Tahiti |
|---|---|---|
| GPU variant | Barts XT (215-0798000) | Tahiti PRO3 (215-0821330) |
| Architecture | TeraScale 2 | GCN 1.0 |
| Fonderie | TSMC | TSMC |
| Taille du processus | 40 nm | 28 nm |
| Transistors | 1,700 million | 4,313 million |
| Taille des matrices | 255 mm² | 352 mm² |
Carte graphique
| Date de publication | Oct 21st, 2010 | Mar 4th, 2014 |
|---|---|---|
| Génération | Northern Islands | Volcanic Islands |
| Production | End-of-life | End-of-life |
| Prix de lancement | 239 USD | 279 USD |
| Bus interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Critiques | 170 in our database | 35 in our database |
| Prédécesseur | Evergreen | Sea Islands |
| Successeur | Southern Islands | Pirate Islands |
Vitesse clock
| GPU clock | 900 MHz | — |
|---|---|---|
| Mémoire clock | 1050 MHz 4.2 Gbps effective | 1250 MHz 5 Gbps effective |
| Base clock | — | 827 MHz |
| Boost clock | — | 933 MHz |
Mémoire
| Taille de la mémoire | 1024 MB | 3 GB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR5 |
| Bus mémoire | 256 bit | 384 bit |
| Bande passante | 134.4 GB/s | 240.0 GB/s |
Render Config
| Shading units | 1120 | 1792 |
|---|---|---|
| TMUs | 56 | 112 |
| ROPs | 32 | 32 |
| Compute units | 14 | 28 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 768 KB |
Performance théorique
| Taux de pixel | 28.80 GPixel/s | 29.86 GPixel/s |
|---|---|---|
| Taux de texture | 50.40 GTexel/s | 104.5 GTexel/s |
| FP32 (float) performance | 2.016 TFLOPS | 3.344 TFLOPS |
| FP64 (double) performance | — | 836.0 GFLOPS (1:4) |
Board Design
| Taille Slot | Dual-slot | Dual-slot |
|---|---|---|
| Longueur | 247 mm 9.7 inches | 275 mm 10.8 inches |
| Taille | 111 mm 4.4 inches | 109 mm 4.3 inches |
| Taille | 36 mm 1.4 inches | 36 mm 1.4 inches |
| TDP | 151 W | 200 W |
| Suggestions pour le PSU | 450 W | 550 W |
| Sorties | 2x DVI1x HDMI2x mini-DisplayPort | 1x DVI2x HDMI1x DisplayPort |
| Connecteurs de puissance | 2x 6-pin | 1x 6-pin + 1x 8-pin |
| Board number | C222 | C386 |
Caractéristiques graphiques
| DirectX | 11.2 (11_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 5.1 |
