ATI Radeon HD 4870 Mac Edition vs ATI Radeon X1650 XT Dual
Processeur graphique
| Nom du GPU | RV770 | RV560 |
|---|---|---|
| GPU variant | RV770 XT Mac (215-0669080) | RV560 XT (215PAGAKA12FG) |
| Architecture | TeraScale | R500 |
| Fonderie | TSMC | TSMC |
| Taille du processus | 55 nm | 80 nm |
| Transistors | 956 million | 330 million |
| Taille des matrices | 256 mm² | 230 mm² |
Carte graphique
| Date de publication | Jan 6th, 2009 | Oct 30th, 2006 |
|---|---|---|
| Génération | Radeon R700 | Radeon R500 PCIe |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 2.0 x16 | PCIe 1.0 x16 |
| Critiques | 135 in our database | 49 in our database |
| Prédécesseur | Radeon R600 | Radeon R400 PCIe |
| Successeur | Evergreen | Radeon R600 |
Vitesse clock
| GPU clock | 750 MHz | 525 MHz |
|---|---|---|
| Mémoire clock | 850 MHz 3.4 Gbps effective | 700 MHz 1400 Mbps effective |
Mémoire
| Taille de la mémoire | 512 MB | 256 MB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR3 |
| Bus mémoire | 256 bit | 128 bit |
| Bande passante | 108.8 GB/s | 22.40 GB/s |
Render Config
| Shading units | 800 | — |
|---|---|---|
| TMUs | 40 | 8 |
| ROPs | 16 | 8 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | — |
| Pixel shaders | — | 24 |
| Vertex shaders | — | 8 |
Performance théorique
| Taux de pixel | 12.00 GPixel/s | 4.200 GPixel/s |
|---|---|---|
| Taux de texture | 30.00 GTexel/s | 4.200 GTexel/s |
| FP32 (float) performance | 1,200 GFLOPS | — |
| FP64 (double) performance | 240.0 GFLOPS (1:5) | — |
| Vertex rate | — | 1.050 GVertices/s |
Board Design
| Taille Slot | Dual-slot | Single-slot |
|---|---|---|
| Longueur | 250 mm 9.8 inches | — |
| TDP | 150 W | unknown |
| Suggestions pour le PSU | 450 W | 200 W |
| Sorties | 1x DVI1x mini-DisplayPort | 2x DVI |
| Connecteurs de puissance | 2x 6-pin | 1x 6-pin |
| Board number | B771 | — |
Caractéristiques graphiques
| DirectX | 10.1 (10_1) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 3.3 | 2.1 |
| OpenCL | 1.1 | — |
| Vulkan | — | — |
| Shader model | 4.1 | 3.0 |
