ATI Radeon HD 4855 vs AMD Radeon R7 M445
What is the difference between ATI Radeon HD 4855 and AMD Radeon R7 M445. Find out which graphics card has better performance.
Graphics Processor (GPU)
| RV770 | GPU Name | Meso |
| RV770 PRO (215-0669065) | Model number | Meso PRO (216-0864032) |
| TeraScale | Architecture | GCN 3.0 |
| TSMC | Foundry | TSMC |
| 55 nm | Process Size | 28 nm |
| 956 million | Transistors | 1,550 million |
| 256 mm² | Die Size | 125 mm² |
Graphics Card
| Jan 3rd, 2010 | Release Date | May 15th, 2016 |
| Radeon R700 (HD 4800) | Family | Crystal System (R7 M400) |
| End-of-life | Production | Active |
| Radeon R600 | Predecessor | Solar System |
| PCIe 2.0 x16 | Bus Interface | PCIe 3.0 x8 |
Memory
| 512 MB | Memory Size | 4 GB |
| GDDR5 | Memory Type | GDDR5 |
| 256 bit | Memory Bus | 64 bit |
| 115.2 GB/s | Bandwidth | 32.00 GB/s |
Performance
| 9.200 GPixel/s | Pixel fillrate | 7.360 GPixel/s |
| 18.40 GTexel/s | Texture fillrate | 18.40 GTexel/s |
| 736.0 GFLOPS | FP32 (float) performance | 588.8 GFLOPS |
| 147.2 GFLOPS (1:5) | FP64 (double) performance | 36.80 GFLOPS (1:16) |
Clock Speeds
| 900 MHz 3.6 Gbps effective | Memory Clock | 1000 MHz 4 Gbps effective |
Render Config
| 640 | Shading Units | 320 |
| 32 | TMUs | 20 |
| 16 | ROPs | 8 |
| 8 | Compute Units | 5 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 256 KB | L2 Cache | 128 KB |
Board Design
| Dual-slot | Slot Width | IGP |
| 110 W | Thermal design power (TDP) | unknown |
| 1x DVI 1x HDMI 1x VGA | 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 | 6.0 |