AMD Radeon R5 A255 vs NVIDIA GeForce GT 645M
What is the difference between AMD Radeon R5 A255 and NVIDIA GeForce GT 645M. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Topaz | GPU Name | GK107 |
| Topaz PRO (216-0864032) | Model number | N13P-GS |
| GCN 3.0 | Architecture | Kepler |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 28 nm |
| 1,550 million | Transistors | 1,270 million |
| 125 mm² | Die Size | 118 mm² |
Graphics Card
| 2014 | Release Date | Oct 1st, 2012 |
| All-In-One (Rx 200) | Family | GeForce 600M |
| End-of-life | Production | End-of-life |
| PCIe 3.0 x8 | Bus Interface | PCIe 3.0 x16 |
Memory
| 1024 MB | Memory Size | 2 GB |
| GDDR5 | Memory Type | DDR3 |
| 128 bit | Memory Bus | 128 bit |
| 64.00 GB/s | Bandwidth | 28.80 GB/s |
Performance
| 7.520 GPixel/s | Pixel fillrate | 5.672 GPixel/s |
| 22.56 GTexel/s | Texture fillrate | 22.69 GTexel/s |
| 721.9 GFLOPS | FP32 (float) performance | 544.5 GFLOPS |
Clock Speeds
| 1000 MHz 4 Gbps effective | Memory Clock | 900 MHz 1800 Mbps effective |
Render Config
| 384 | Shading Units | 384 |
| 24 | TMUs | 32 |
| 8 | ROPs | 16 |
| 16 KB (per CU) | L1 Cache | 16 KB (per SMX) |
| 256 KB | L2 Cache | 256 KB |
Board Design
| unknown | Thermal design power (TDP) | 32 W |
| No outputs | Display Connectors | No outputs |
API support
| 12 (12_0) | DirectX | 12 (11_0) |
| 4.6 | OpenGL | 4.6 |
| 2.0 | OpenCL | 3.0 |
| 1.2 | Vulkan | 1.1 |
| 6.3 | Shader Model | 5.1 |