AMD Radeon HD 7870M vs NVIDIA GeForce 845M
Processeur graphique
| Nom du GPU | Heathrow | GM107 |
|---|---|---|
| GPU variant | Heathrow XT (216-0835033) | N15S-GT1R |
| Architecture | GCN 1.0 | Maxwell |
| Fonderie | TSMC | TSMC |
| Taille du processus | 28 nm | 28 nm |
| Transistors | 1,500 million | 1,870 million |
| Taille des matrices | 123 mm² | 148 mm² |
Graphiques mobiles
| Date de publication | Apr 24th, 2012 | Feb 7th, 2015 |
|---|---|---|
| Génération | London (HD 7800M) | GeForce 800M |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Prédécesseur | Vancouver | GeForce 700M |
| Successeur | Solar System | GeForce 900M |
Vitesse clock
| GPU clock | 800 MHz | 863 MHz |
|---|---|---|
| Mémoire clock | 1000 MHz 4 Gbps effective | 1001 MHz 2 Gbps effective |
Mémoire
| Taille de la mémoire | 2 GB | 2 GB |
|---|---|---|
| Type de mémoire | GDDR5 | DDR3 |
| Bus mémoire | 128 bit | 64 bit |
| Bande passante | 64.00 GB/s | 16.02 GB/s |
Render Config
| Shading units | 640 | 512 |
|---|---|---|
| TMUs | 40 | 32 |
| ROPs | 16 | 16 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 64 KB (per SMM) |
| Cache L2 | 256 KB | 1024 KB |
| Comptage SMM | — | 4 |
Performance théorique
| Taux de pixel | 12.80 GPixel/s | 13.81 GPixel/s |
|---|---|---|
| Taux de texture | 32.00 GTexel/s | 27.62 GTexel/s |
| FP32 (float) performance | 1,024 GFLOPS | 883.7 GFLOPS |
| FP64 (double) performance | 64.00 GFLOPS (1:16) | 27.62 GFLOPS (1:32) |
Board Design
| TDP | 45 W | 45 W |
|---|---|---|
| Sorties | No outputs | No outputs |
| Taille Slot | — | IGP |
Caractéristiques graphiques
| DirectX | 12 (11_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 5.1 | 5.1 |
| CUDA | — | 5.0 |
