NVIDIA GeForce 820M vs NVIDIA GeForce GT 740M
Processeur graphique
| Nom du GPU | GF117 | GK107 |
|---|---|---|
| GPU variant | N15V-GM-B-A2 | GT 740M |
| Architecture | Fermi 2.0 | Kepler |
| Fonderie | TSMC | TSMC |
| Taille du processus | 28 nm | 28 nm |
| Transistors | 585 million | 1,270 million |
| Taille des matrices | 116 mm² | 118 mm² |
Graphiques mobiles
| Date de publication | Nov 27th, 2013 | Apr 1st, 2013 |
|---|---|---|
| Génération | GeForce 800M | GeForce 700M |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Prédécesseur | GeForce 700M | GeForce 600M |
| Successeur | GeForce 900M | GeForce 800M |
Vitesse clock
| GPU clock | 625 MHz | 810 MHz |
|---|---|---|
| Shader clock | 1250 MHz | — |
| Mémoire clock | 900 MHz 1800 Mbps effective | 901 MHz 1802 Mbps effective |
Mémoire
| Taille de la mémoire | 1024 MB | 2 GB |
|---|---|---|
| Type de mémoire | DDR3 | DDR3 |
| Bus mémoire | 64 bit | 128 bit |
| Bande passante | 14.40 GB/s | 28.83 GB/s |
Render Config
| Shading units | 96 | 384 |
|---|---|---|
| TMUs | 16 | 32 |
| ROPs | 8 | 16 |
| Comptage SM | 2 | — |
| Cache L1 | 64 KB (per SM) | 16 KB (per SMX) |
| Cache L2 | 128 KB | 256 KB |
| Comptage SMX | — | 2 |
Performance théorique
| Taux de pixel | 2.500 GPixel/s | 6.480 GPixel/s |
|---|---|---|
| Taux de texture | 10.00 GTexel/s | 25.92 GTexel/s |
| FP32 (float) performance | 240.0 GFLOPS | 622.1 GFLOPS |
| FP64 (double) performance | 20.00 GFLOPS (1:12) | 25.92 GFLOPS (1:24) |
Board Design
| TDP | 15 W | 45 W |
|---|---|---|
| Sorties | No outputs | No outputs |
| Taille Slot | — | MXM Module |
Caractéristiques graphiques
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | — | 1.1 |
| CUDA | 2.1 | 3.0 |
| Shader model | 5.1 | 5.1 |
