NVIDIA GeForce GT 445M vs NVIDIA GeForce GT 640M
Processeur graphique
| Nom du GPU | GF106 | GK107 |
|---|---|---|
| GPU variant | N11E-GE-A1 | N13P-GS |
| Architecture | Fermi | Kepler |
| Fonderie | TSMC | TSMC |
| Taille du processus | 40 nm | 28 nm |
| Transistors | 1,170 million | 1,270 million |
| Taille des matrices | 238 mm² | 118 mm² |
Graphiques mobiles
| Date de publication | Sep 3rd, 2010 | Mar 22nd, 2012 |
|---|---|---|
| Génération | GeForce 400M | GeForce 600M |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Prédécesseur | GeForce 300M | GeForce 500M |
| Successeur | GeForce 500M | GeForce 700M |
| Critiques | — | 2 in our database |
Vitesse clock
| GPU clock | 570 MHz | 625 MHz |
|---|---|---|
| Shader clock | 1140 MHz | — |
| Mémoire clock | 625 MHz 2.5 Gbps effective | 900 MHz 1800 Mbps effective |
Mémoire
| Taille de la mémoire | 1024 MB | 2 GB |
|---|---|---|
| Type de mémoire | GDDR5 | DDR3 |
| Bus mémoire | 128 bit | 128 bit |
| Bande passante | 40.00 GB/s | 28.80 GB/s |
Render Config
| Shading units | 144 | 384 |
|---|---|---|
| TMUs | 24 | 32 |
| ROPs | 16 | 16 |
| Comptage SM | 3 | — |
| Cache L1 | 64 KB (per SM) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 256 KB |
| Comptage SMX | — | 2 |
Performance théorique
| Taux de pixel | 3.420 GPixel/s | 5.000 GPixel/s |
|---|---|---|
| Taux de texture | 13.68 GTexel/s | 20.00 GTexel/s |
| FP32 (float) performance | 328.3 GFLOPS | 480.0 GFLOPS |
| FP64 (double) performance | 27.36 GFLOPS (1:12) | 20.00 GFLOPS (1:24) |
Board Design
| TDP | 35 W | 32 W |
|---|---|---|
| Sorties | No outputs | No outputs |
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 |
