AMD Radeon HD 7870 XT vs NVIDIA GeForce GTX 660 Ti
Processeur graphique
| Nom du GPU | Tahiti | GK104 |
|---|---|---|
| GPU variant | Tahiti LE (215-0821122) | GK104-300-KD-A2 |
| Architecture | GCN 1.0 | Kepler |
| Fonderie | TSMC | TSMC |
| Taille du processus | 28 nm | 28 nm |
| Transistors | 4,313 million | 3,540 million |
| Taille des matrices | 352 mm² | 294 mm² |
Carte graphique
| Date de publication | Nov 19th, 2012 | Aug 16th, 2012 |
|---|---|---|
| Génération | Southern Islands | GeForce 600 |
| Production | End-of-life | End-of-life |
| Prix de lancement | 270 USD | 299 USD |
| Bus interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Critiques | 95 in our database | 83 in our database |
| Prédécesseur | Northern Islands | GeForce 500 |
| Successeur | Sea Islands | GeForce 700 |
Vitesse clock
| Base clock | 925 MHz | 915 MHz |
|---|---|---|
| Boost clock | 975 MHz | 980 MHz |
| Mémoire clock | 1500 MHz 6 Gbps effective | 1502 MHz 6 Gbps effective |
Mémoire
| Taille de la mémoire | 2 GB | 2 GB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR5 |
| Bus mémoire | 256 bit | 192 bit |
| Bande passante | 192.0 GB/s | 144.2 GB/s |
Render Config
| Shading units | 1536 | 1344 |
|---|---|---|
| TMUs | 96 | 112 |
| ROPs | 32 | 24 |
| Compute units | 24 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 512 KB | 384 KB |
| Comptage SMX | — | 7 |
Performance théorique
| Taux de pixel | 31.20 GPixel/s | 27.44 GPixel/s |
|---|---|---|
| Taux de texture | 93.60 GTexel/s | 109.8 GTexel/s |
| FP32 (float) performance | 2.995 TFLOPS | 2.634 TFLOPS |
| FP64 (double) performance | 748.8 GFLOPS (1:4) | 109.8 GFLOPS (1:24) |
Board Design
| Taille Slot | Dual-slot | Dual-slot |
|---|---|---|
| Longueur | 267 mm 10.5 inches | 241 mm 9.5 inches |
| TDP | 185 W | 150 W |
| Suggestions pour le PSU | 450 W | 450 W |
| Sorties | 1x DVI1x HDMI2x mini-DisplayPort | 2x DVI1x HDMI1x DisplayPort |
| Connecteurs de puissance | 2x 6-pin | 2x 6-pin |
| Board number | C474 | P2004 |
Caractéristiques graphiques
| DirectX | 12 (11_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 5.1 | 5.1 |
| CUDA | — | 3.0 |
