ATI Radeon HD 4870 X2 vs NVIDIA Quadro K420
Processeur graphique
| Nom du GPU | R700 | GK107 |
|---|---|---|
| GPU variant | R700 XT (215-0669045) | GK107-301-A2 |
| Architecture | TeraScale | Kepler |
| Fonderie | TSMC | TSMC |
| Taille du processus | 55 nm | 28 nm |
| Transistors | 956 million | 1,270 million |
| Taille des matrices | 256 mm² | 118 mm² |
Carte graphique
| Date de publication | Aug 12th, 2008 | Jul 22nd, 2014 |
|---|---|---|
| Génération | Radeon R700 | Quadro |
| Production | End-of-life | End-of-life |
| Prix de lancement | 550 USD | — |
| Bus interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Critiques | 79 in our database | 26 in our database |
| Prédécesseur | Radeon R600 | — |
| Successeur | Evergreen | — |
Vitesse clock
| GPU clock | 750 MHz | 876 MHz |
|---|---|---|
| Mémoire clock | 900 MHz 3.6 Gbps effective | 891 MHz 1782 Mbps effective |
Mémoire
| Taille de la mémoire | 1024 MB | 1024 MB |
|---|---|---|
| Type de mémoire | GDDR5 | DDR3 |
| Bus mémoire | 256 bit | 128 bit |
| Bande passante | 115.2 GB/s | 28.51 GB/s |
Render Config
| Shading units | 800 | 192 |
|---|---|---|
| TMUs | 40 | 16 |
| ROPs | 16 | 16 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 256 KB |
| Comptage SMX | — | 1 |
Performance théorique
| Taux de pixel | 12.00 GPixel/s | 3.504 GPixel/s |
|---|---|---|
| Taux de texture | 30.00 GTexel/s | 14.02 GTexel/s |
| FP32 (float) performance | 1,200 GFLOPS | 336.4 GFLOPS |
| FP64 (double) performance | 240.0 GFLOPS (1:5) | 14.02 GFLOPS (1:24) |
Board Design
| Taille Slot | Dual-slot | Single-slot |
|---|---|---|
| Longueur | 267 mm 10.5 inches | 160 mm 6.3 inches |
| Taille | 111 mm 4.4 inches | 69 mm 2.7 inches |
| Taille | 38 mm 1.5 inches | — |
| TDP | 286 W | 41 W |
| Suggestions pour le PSU | 600 W | 200 W |
| Sorties | 2x DVI1x S-Video | 1x DVI1x DisplayPort |
| Connecteurs de puissance | 1x 6-pin + 1x 8-pin | None |
| Board number | B509-37 | P2012 |
Caractéristiques graphiques
| DirectX | 10.1 (10_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 4.1 | 5.1 |
| CUDA | — | 3.0 |
