ATI Radeon HD 3850 vs ATI Radeon HD 4670 X2
Processeur graphique
| Nom du GPU | RV670 | RV730 |
|---|---|---|
| GPU variant | RV670 PRO (215-0708003) | RV730 XT (215-0719047) |
| Architecture | TeraScale | TeraScale |
| Fonderie | TSMC | TSMC |
| Taille du processus | 55 nm | 55 nm |
| Transistors | 666 million | 514 million |
| Taille des matrices | 192 mm² | 146 mm² |
Carte graphique
| Date de publication | Nov 19th, 2007 | Sep 10th, 2008 |
|---|---|---|
| Génération | Radeon R600 | Radeon R700 |
| Production | End-of-life | End-of-life |
| Prix de lancement | 179 USD | — |
| Bus interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Critiques | 71 in our database | 49 in our database |
| Prédécesseur | Radeon R500 PCIe | Radeon R600 |
| Successeur | Radeon R700 | Evergreen |
Vitesse clock
| GPU clock | 668 MHz | 750 MHz |
|---|---|---|
| Mémoire clock | 830 MHz 1660 Mbps effective | 700 MHz 1400 Mbps effective |
Mémoire
| Taille de la mémoire | 512 MB | 512 MB |
|---|---|---|
| Type de mémoire | GDDR3 | GDDR3 |
| Bus mémoire | 256 bit | 128 bit |
| Bande passante | 53.12 GB/s | 22.40 GB/s |
Render Config
| Shading units | 320 | 320 |
|---|---|---|
| TMUs | 16 | 32 |
| ROPs | 16 | 8 |
| Compute units | 4 | 4 |
| Cache L2 | 256 KB | 128 KB |
| Cache L1 | — | 16 KB (per CU) |
Performance théorique
| Taux de pixel | 10.69 GPixel/s | 6.000 GPixel/s |
|---|---|---|
| Taux de texture | 10.69 GTexel/s | 24.00 GTexel/s |
| FP32 (float) performance | 427.5 GFLOPS | 480.0 GFLOPS |
| FP64 (double) performance | 85.50 GFLOPS (1:5) | — |
Board Design
| Taille Slot | Single-slot | Dual-slot |
|---|---|---|
| Longueur | 208 mm 8.2 inches | — |
| TDP | 75 W | 118 W |
| Suggestions pour le PSU | 250 W | 300 W |
| Sorties | 2x DVI1x S-Video | 4x DVI |
| Connecteurs de puissance | 1x 6-pin | 1x 6-pin |
| Board number | B340, B400 | — |
Caractéristiques graphiques
| DirectX | 10.1 (10_1) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 3.3 (full) 4.0 (partial) | 3.3 |
| OpenCL | — | 1.1 |
| Vulkan | — | — |
| Shader model | 4.1 | 4.1 |
