NVIDIA GeForce GT 640M LE vs NVIDIA GeForce GT 740A
Processeur graphique
| Nom du GPU | GF108 | GK208 |
|---|---|---|
| Architecture | Fermi | Kepler 2.0 |
| Fonderie | TSMC | TSMC |
| Taille du processus | 40 nm | 28 nm |
| Transistors | 585 million | 1,020 million |
| Taille des matrices | 116 mm² | 87 mm² |
| GPU variant | — | GT 740M |
Graphiques mobiles
| Date de publication | May 4th, 2012 | Aug 26th, 2013 |
|---|---|---|
| Génération | GeForce 600M | GeForce 700A |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 2.0 x16 | PCIe 3.0 x8 |
| Critiques | 2 in our database | — |
| Prédécesseur | GeForce 500M | GeForce 600A |
| Successeur | GeForce 700M | GeForce 800A |
Vitesse clock
| GPU clock | 753 MHz | 980 MHz |
|---|---|---|
| Shader clock | 1505 MHz | — |
| Mémoire clock | 785 MHz 3.1 Gbps effective | 900 MHz 1800 Mbps effective |
Mémoire
| Taille de la mémoire | 2 GB | 2 GB |
|---|---|---|
| Type de mémoire | GDDR5 | DDR3 |
| Bus mémoire | 128 bit | 64 bit |
| Bande passante | 50.24 GB/s | 14.40 GB/s |
Render Config
| Shading units | 96 | 384 |
|---|---|---|
| TMUs | 16 | 32 |
| ROPs | 4 | 8 |
| Comptage SM | 2 | — |
| Cache L1 | 64 KB (per SM) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 512 KB |
| Comptage SMX | — | 2 |
Performance théorique
| Taux de pixel | 3.012 GPixel/s | 7.840 GPixel/s |
|---|---|---|
| Taux de texture | 12.05 GTexel/s | 31.36 GTexel/s |
| FP32 (float) performance | 289.0 GFLOPS | 752.6 GFLOPS |
| FP64 (double) performance | 24.08 GFLOPS (1:12) | 31.36 GFLOPS (1:24) |
Board Design
| TDP | 32 W | 33 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 | 3.5 |
| Shader model | 5.1 | 5.1 |
