AMD Radeon R5 A255 vs ATI Radeon HD 4860
What is the difference between AMD Radeon R5 A255 and ATI Radeon HD 4860. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Topaz | GPU Name | RV790 |
| Topaz PRO (216-0864032) | Model number | RV790 GT |
| GCN 3.0 | Architecture | TeraScale |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 55 nm |
| 1,550 million | Transistors | 959 million |
| 125 mm² | Die Size | 282 mm² |
Graphics Card
| 2014 | Release Date | Sep 9th, 2009 |
| All-In-One (Rx 200) | Family | Radeon R700 (HD 4800) |
| End-of-life | Production | End-of-life |
| PCIe 3.0 x8 | Bus Interface | PCIe 2.0 x16 |
Memory
| 1024 MB | Memory Size | 512 MB |
| GDDR5 | Memory Type | GDDR5 |
| 128 bit | Memory Bus | 256 bit |
| 64.00 GB/s | Bandwidth | 96.00 GB/s |
Performance
| 7.520 GPixel/s | Pixel fillrate | 11.20 GPixel/s |
| 22.56 GTexel/s | Texture fillrate | 22.40 GTexel/s |
| 721.9 GFLOPS | FP32 (float) performance | 896.0 GFLOPS |
Clock Speeds
| 1000 MHz 4 Gbps effective | Memory Clock | 750 MHz 3 Gbps effective |
Render Config
| 384 | Shading Units | 640 |
| 24 | TMUs | 32 |
| 8 | ROPs | 16 |
| 6 | Compute Units | 8 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 256 KB | L2 Cache | 256 KB |
Board Design
| unknown | Thermal design power (TDP) | 130 W |
| No outputs | Display Connectors | 2x DVI 1x S-Video |
API support
| 12 (12_0) | DirectX | 10.1 (10_1) |
| 4.6 | OpenGL | 3.3 |
| 2.0 | OpenCL | 1.1 |
| 1.2 | Vulkan | N/A |
| 6.3 | Shader Model | 4.1 |