NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 295
Processeur graphique
| Nom du GPU | GK107 | GT200B |
|---|---|---|
| GPU variant | GK107-300-A2 | G200-401-B3 |
| Architecture | Kepler | Tesla 2.0 |
| Fonderie | TSMC | TSMC |
| Taille du processus | 28 nm | 55 nm |
| Transistors | 1,270 million | 1,400 million |
| Taille des matrices | 118 mm² | 470 mm² |
Carte graphique
| Date de publication | Jun 5th, 2012 | Jan 8th, 2009 |
|---|---|---|
| Génération | GeForce 600 | GeForce 200 |
| Production | End-of-life | End-of-life |
| Prix de lancement | 99 USD | 500 USD |
| Bus interface | PCIe 3.0 x16 | PCIe 2.0 x16 |
| Prédécesseur | GeForce 500 | GeForce 9 |
| Successeur | GeForce 700 | GeForce 400 |
| Critiques | — | 74 in our database |
Vitesse clock
| GPU clock | 902 MHz | 576 MHz |
|---|---|---|
| Mémoire clock | 891 MHz 1782 Mbps effective | 999 MHz 1998 Mbps effective |
| Shader clock | — | 1242 MHz |
Mémoire
| Taille de la mémoire | 2 GB | 896 MB |
|---|---|---|
| Type de mémoire | DDR3 | GDDR3 |
| Bus mémoire | 128 bit | 448 bit |
| Bande passante | 28.51 GB/s | 111.9 GB/s |
Render Config
| Shading units | 384 | 240 |
|---|---|---|
| TMUs | 32 | 80 |
| ROPs | 16 | 28 |
| Comptage SMX | 2 | — |
| Cache L1 | 16 KB (per SMX) | — |
| Cache L2 | 256 KB | 224 KB |
| Comptage SM | — | 30 |
Performance théorique
| Taux de pixel | 7.216 GPixel/s | 16.13 GPixel/s |
|---|---|---|
| Taux de texture | 28.86 GTexel/s | 46.08 GTexel/s |
| FP32 (float) performance | 692.7 GFLOPS | 596.2 GFLOPS |
| FP64 (double) performance | 28.86 GFLOPS (1:24) | 74.52 GFLOPS (1:8) |
Board Design
| Taille Slot | Single-slot | Dual-slot |
|---|---|---|
| Longueur | 145 mm 5.7 inches | 267 mm 10.5 inches |
| TDP | 65 W | 289 W |
| Suggestions pour le PSU | 250 W | 600 W |
| Sorties | 1x DVI1x HDMI1x DisplayPort | 2x DVI1x HDMI |
| Connecteurs de puissance | None | 1x 6-pin + 1x 8-pin |
| Board number | P2011 | P657 |
| Taille | — | 111 mm 4.4 inches |
| Taille | — | 38 mm 1.5 inches |
Caractéristiques graphiques
| DirectX | 12 (11_0) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 4.6 | 3.3 |
| OpenCL | 3.0 | 1.1 |
| Vulkan | 1.1 | — |
| CUDA | 3.0 | 1.3 |
| Shader model | 5.1 | 4.0 |
