ATI Radeon HD 3850 vs NVIDIA GeForce 7900 GTX
Processeur graphique
| Nom du GPU | RV670 | G71 |
|---|---|---|
| GPU variant | RV670 PRO (215-0708003) | G71-U-N-A2 |
| Architecture | TeraScale | Curie |
| Fonderie | TSMC | TSMC |
| Taille du processus | 55 nm | 90 nm |
| Transistors | 666 million | 278 million |
| Taille des matrices | 192 mm² | 196 mm² |
Carte graphique
| Date de publication | Nov 19th, 2007 | Mar 9th, 2006 |
|---|---|---|
| Génération | Radeon R600 | GeForce 7 PCIe |
| Production | End-of-life | End-of-life |
| Prix de lancement | 179 USD | — |
| Bus interface | PCIe 2.0 x16 | PCIe 1.0 x16 |
| Critiques | 71 in our database | 145 in our database |
| Prédécesseur | Radeon R500 PCIe | GeForce 6 PCIe |
| Successeur | Radeon R700 | GeForce 8 |
Vitesse clock
| GPU clock | 668 MHz | 650 MHz |
|---|---|---|
| Mémoire clock | 830 MHz 1660 Mbps effective | 800 MHz 1600 Mbps effective |
Mémoire
| Taille de la mémoire | 512 MB | 512 MB |
|---|---|---|
| Type de mémoire | GDDR3 | GDDR3 |
| Bus mémoire | 256 bit | 256 bit |
| Bande passante | 53.12 GB/s | 51.20 GB/s |
Render Config
| Shading units | 320 | — |
|---|---|---|
| TMUs | 16 | 24 |
| ROPs | 16 | 16 |
| Compute units | 4 | — |
| Cache L2 | 256 KB | — |
| Pixel shaders | — | 24 |
| Vertex shaders | — | 8 |
Performance théorique
| Taux de pixel | 10.69 GPixel/s | 10.40 GPixel/s |
|---|---|---|
| Taux de texture | 10.69 GTexel/s | 15.60 GTexel/s |
| FP32 (float) performance | 427.5 GFLOPS | — |
| FP64 (double) performance | 85.50 GFLOPS (1:5) | — |
| Vertex rate | — | 1.300 GVertices/s |
Board Design
| Taille Slot | Single-slot | Single-slot |
|---|---|---|
| Longueur | 208 mm 8.2 inches | — |
| TDP | 75 W | 84 W |
| Suggestions pour le PSU | 250 W | 250 W |
| Sorties | 2x DVI1x S-Video | 2x DVI1x S-Video |
| Connecteurs de puissance | 1x 6-pin | 1x 6-pin |
| Board number | B340, B400 | P348 |
Caractéristiques graphiques
| DirectX | 10.1 (10_1) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 3.3 (full) 4.0 (partial) | 2.1 |
| OpenCL | — | — |
| Vulkan | — | — |
| Shader model | 4.1 | 3.0 |
