ATI Radeon HD 4870 vs NVIDIA GeForce GTX 275
Processeur graphique
| Nom du GPU | RV770 | GT200B |
|---|---|---|
| GPU variant | RV770 XT (215-0669049) | G200-105-B3 |
| Architecture | TeraScale | Tesla 2.0 |
| Fonderie | TSMC | TSMC |
| Taille du processus | 55 nm | 55 nm |
| Transistors | 956 million | 1,400 million |
| Taille des matrices | 256 mm² | 470 mm² |
Carte graphique
| Date de publication | Jun 25th, 2008 | Jan 15th, 2009 |
|---|---|---|
| Génération | Radeon R700 | GeForce 200 |
| Production | End-of-life | End-of-life |
| Prix de lancement | 299 USD | 249 USD |
| Bus interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Critiques | 135 in our database | 61 in our database |
| Prédécesseur | Radeon R600 | GeForce 9 |
| Successeur | Evergreen | GeForce 400 |
Vitesse clock
| GPU clock | 750 MHz | 633 MHz |
|---|---|---|
| Mémoire clock | 900 MHz 3.6 Gbps effective | 1134 MHz 2.3 Gbps effective |
| Shader clock | — | 1404 MHz |
Mémoire
| Taille de la mémoire | 512 MB | 896 MB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR3 |
| Bus mémoire | 256 bit | 448 bit |
| Bande passante | 115.2 GB/s | 127.0 GB/s |
Render Config
| Shading units | 800 | 240 |
|---|---|---|
| TMUs | 40 | 80 |
| ROPs | 16 | 28 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | 224 KB |
| Comptage SM | — | 30 |
Performance théorique
| Taux de pixel | 12.00 GPixel/s | 17.72 GPixel/s |
|---|---|---|
| Taux de texture | 30.00 GTexel/s | 50.64 GTexel/s |
| FP32 (float) performance | 1,200 GFLOPS | 673.9 GFLOPS |
| FP64 (double) performance | 240.0 GFLOPS (1:5) | 84.24 GFLOPS (1:8) |
Board Design
| Taille Slot | Dual-slot | Dual-slot |
|---|---|---|
| Longueur | 241 mm 9.5 inches | 267 mm 10.5 inches |
| Taille | 111 mm 4.4 inches | — |
| Taille | 40 mm 1.6 inches | — |
| TDP | 150 W | 219 W |
| Suggestions pour le PSU | 450 W | 550 W |
| Sorties | 2x DVI1x S-Video | 2x DVI |
| Connecteurs de puissance | 2x 6-pin | 2x 6-pin |
| Board number | B507-31 | P897 |
Caractéristiques graphiques
| DirectX | 10.1 (10_1) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 3.3 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| Shader model | 4.1 | 4.0 |
| CUDA | — | 1.3 |
