AMD Radeon HD 7850M vs ATI Mobility Radeon HD 4870
Processeur graphique
| Nom du GPU | Heathrow | M98 |
|---|---|---|
| GPU variant | Heathrow PRO | M98 XT (216-0732023) |
| Architecture | GCN 1.0 | TeraScale |
| Fonderie | TSMC | TSMC |
| Taille du processus | 28 nm | 55 nm |
| Transistors | 1,500 million | 956 million |
| Taille des matrices | 123 mm² | 256 mm² |
Graphiques mobiles
| Date de publication | Apr 24th, 2012 | Jan 9th, 2009 |
|---|---|---|
| Génération | London (HD 7800M) | M9x (Mobility HD 4800) |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 3.0 x16 | PCIe 2.0 x16 |
| Prédécesseur | Vancouver | M8x |
| Successeur | Solar System | Manhattan |
| Critiques | — | 2 in our database |
Vitesse clock
| GPU clock | 675 MHz | 550 MHz |
|---|---|---|
| Mémoire clock | 1000 MHz 4 Gbps effective | 888 MHz 1776 Mbps effective |
Mémoire
| Taille de la mémoire | 2 GB | 512 MB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR3 |
| Bus mémoire | 128 bit | 256 bit |
| Bande passante | 64.00 GB/s | 56.83 GB/s |
Render Config
| Shading units | 640 | 800 |
|---|---|---|
| TMUs | 40 | 40 |
| ROPs | 16 | 16 |
| Compute units | 10 | 10 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 256 KB |
Performance théorique
| Taux de pixel | 10.80 GPixel/s | 8.800 GPixel/s |
|---|---|---|
| Taux de texture | 27.00 GTexel/s | 22.00 GTexel/s |
| FP32 (float) performance | 864.0 GFLOPS | 880.0 GFLOPS |
| FP64 (double) performance | 54.00 GFLOPS (1:16) | 176.0 GFLOPS (1:5) |
Board Design
| TDP | 40 W | unknown |
|---|---|---|
| Sorties | No outputs | No outputs |
Caractéristiques graphiques
| DirectX | 12 (11_1) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 4.6 | 3.3 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.2 | — |
| Shader model | 5.1 | 4.1 |
