NVIDIA GeForce 830A vs ATI Radeon HD 4855
What is the difference between NVIDIA GeForce 830A and ATI Radeon HD 4855. Find out which graphics card has better performance.
Graphics Processor (GPU)
| GM108 | GPU Name | RV770 |
| Maxwell | Architecture | TeraScale |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 55 nm |
| unknown | Transistors | 956 million |
| unknown | Die Size | 256 mm² |
Graphics Card
| Jul 22nd, 2014 | Release Date | Jan 3rd, 2010 |
| GeForce 800A | Family | Radeon R700 (HD 4800) |
| End-of-life | Production | End-of-life |
| GeForce 700A | Predecessor | Radeon R600 |
| PCIe 3.0 x8 | Bus Interface | PCIe 2.0 x16 |
Memory
| 2 GB | Memory Size | 512 MB |
| DDR3 | Memory Type | GDDR5 |
| 64 bit | Memory Bus | 256 bit |
| 14.40 GB/s | Bandwidth | 115.2 GB/s |
Performance
| 9.200 GPixel/s | Pixel fillrate | 9.200 GPixel/s |
| 18.40 GTexel/s | Texture fillrate | 18.40 GTexel/s |
| 588.8 GFLOPS | FP32 (float) performance | 736.0 GFLOPS |
| 18.40 GFLOPS (1:32) | FP64 (double) performance | 147.2 GFLOPS (1:5) |
Clock Speeds
| 900 MHz 1800 Mbps effective | Memory Clock | 900 MHz 3.6 Gbps effective |
Render Config
| 256 | Shading Units | 640 |
| 16 | TMUs | 32 |
| 8 | ROPs | 16 |
| 64 KB (per SMM) | L1 Cache | 16 KB (per CU) |
| 1024 KB | L2 Cache | 256 KB |
Board Design
| IGP | Slot Width | Dual-slot |
| 33 W | Thermal design power (TDP) | 110 W |
| No outputs | Display Connectors | 1x DVI 1x HDMI 1x VGA |
API support
| 12 (11_0) | DirectX | 10.1 (10_1) |
| 4.6 | OpenGL | 3.3 |
| 3.0 | OpenCL | 1.1 |
| 1.1 | Vulkan | N/A |
| 5.1 | Shader Model | 4.1 |