ATI Radeon HD 4860 vs AMD Radeon R5 M255
What is the difference between ATI Radeon HD 4860 and AMD Radeon R5 M255. Find out which graphics card has better performance.
Graphics Processor (GPU)
| RV790 | GPU Name | Topaz |
| RV790 GT | Model number | Topaz PRO (216-0864032) |
| TeraScale | Architecture | GCN 3.0 |
| TSMC | Foundry | TSMC |
| 55 nm | Process Size | 28 nm |
| 959 million | Transistors | 1,550 million |
| 282 mm² | Die Size | 125 mm² |
Graphics Card
| Sep 9th, 2009 | Release Date | Oct 12th, 2014 |
| Radeon R700 (HD 4800) | Family | Crystal System (R5 M200) |
| End-of-life | Production | End-of-life |
| Radeon R600 | Predecessor | Solar System |
| PCIe 2.0 x16 | Bus Interface | PCIe 3.0 x8 |
Memory
| 512 MB | Memory Size | 1024 MB |
| GDDR5 | Memory Type | GDDR5 |
| 256 bit | Memory Bus | 128 bit |
| 96.00 GB/s | Bandwidth | 64.00 GB/s |
Performance
| 11.20 GPixel/s | Pixel fillrate | 7.520 GPixel/s |
| 22.40 GTexel/s | Texture fillrate | 22.56 GTexel/s |
| 896.0 GFLOPS | FP32 (float) performance | 721.9 GFLOPS |
| 179.2 GFLOPS (1:5) | FP64 (double) performance | 45.12 GFLOPS (1:16) |
Clock Speeds
| 750 MHz 3 Gbps effective | Memory Clock | 1000 MHz 4 Gbps effective |
Render Config
| 640 | Shading Units | 384 |
| 32 | TMUs | 24 |
| 16 | ROPs | 8 |
| 8 | Compute Units | 6 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 256 KB | L2 Cache | 256 KB |
Board Design
| 130 W | Thermal design power (TDP) | unknown |
| 2x DVI 1x S-Video | Display Connectors | No outputs |
API support
| 10.1 (10_1) | DirectX | 12 (12_0) |
| 3.3 | OpenGL | 4.6 |
| 1.1 | OpenCL | 2.0 |
| N/A | Vulkan | 1.2 |
| 4.1 | Shader Model | 6.3 |