ATI Mobility Radeon HD 4850 vs NVIDIA GeForce GT 640M LE
Processeur graphique
| Nom du GPU | M98 | GF108 |
|---|---|---|
| Architecture | TeraScale | Fermi |
| Fonderie | TSMC | TSMC |
| Taille du processus | 55 nm | 40 nm |
| Transistors | 956 million | 585 million |
| Taille des matrices | 256 mm² | 116 mm² |
Graphiques mobiles
| Date de publication | Jan 9th, 2009 | May 4th, 2012 |
|---|---|---|
| Génération | M9x (Mobility HD 4800) | GeForce 600M |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Critiques | 2 in our database | 2 in our database |
| Prédécesseur | M8x | GeForce 500M |
| Successeur | Manhattan | GeForce 700M |
Vitesse clock
| GPU clock | 500 MHz | 753 MHz |
|---|---|---|
| Mémoire clock | 850 MHz 1700 Mbps effective | 785 MHz 3.1 Gbps effective |
| Shader clock | — | 1505 MHz |
Mémoire
| Taille de la mémoire | 1024 MB | 2 GB |
|---|---|---|
| Type de mémoire | GDDR3 | GDDR5 |
| Bus mémoire | 256 bit | 128 bit |
| Bande passante | 54.40 GB/s | 50.24 GB/s |
Render Config
| Shading units | 800 | 96 |
|---|---|---|
| TMUs | 40 | 16 |
| ROPs | 16 | 4 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 64 KB (per SM) |
| Cache L2 | 256 KB | 256 KB |
| Comptage SM | — | 2 |
Performance théorique
| Taux de pixel | 8.000 GPixel/s | 3.012 GPixel/s |
|---|---|---|
| Taux de texture | 20.00 GTexel/s | 12.05 GTexel/s |
| FP32 (float) performance | 800.0 GFLOPS | 289.0 GFLOPS |
| FP64 (double) performance | 160.0 GFLOPS (1:5) | 24.08 GFLOPS (1:12) |
Board Design
| TDP | unknown | 32 W |
|---|---|---|
| Sorties | No outputs | No outputs |
Caractéristiques graphiques
| DirectX | 10.1 (10_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| Shader model | 4.1 | 5.1 |
| CUDA | — | 2.1 |
