NVIDIA GeForce 920A vs ATI Radeon HD 4870 Mac Edition
What is the difference between NVIDIA GeForce 920A and ATI Radeon HD 4870 Mac Edition. Find out which graphics card has better performance.
Graphics Processor (GPU)
| GK208B | GPU Name | RV770 |
| N16V-GM | Model number | RV770 XT Mac (215-0669080) |
| Kepler 2.0 | Architecture | TeraScale |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 55 nm |
| 1,020 million | Transistors | 956 million |
| 87 mm² | Die Size | 256 mm² |
Graphics Card
| Mar 13th, 2015 | Release Date | Jan 6th, 2009 |
| GeForce 900A | Family | Radeon R700 (HD 4800) |
| Active | Production | End-of-life |
| GeForce 800A | 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 |
| 16.02 GB/s | Bandwidth | 108.8 GB/s |
Performance
| 7.632 GPixel/s | Pixel fillrate | 12.00 GPixel/s |
| 30.53 GTexel/s | Texture fillrate | 30.00 GTexel/s |
| 732.7 GFLOPS | FP32 (float) performance | 1,200 GFLOPS |
| 30.53 GFLOPS (1:24) | FP64 (double) performance | 240.0 GFLOPS (1:5) |
Clock Speeds
| 1001 MHz 2 Gbps effective | Memory Clock | 850 MHz 3.4 Gbps effective |
| 954 MHz | GPU Clock | 750 MHz |
Render Config
| 384 | Shading Units | 800 |
| 32 | TMUs | 40 |
| 8 | ROPs | 16 |
| 16 KB (per SMX) | L1 Cache | 16 KB (per CU) |
| 512 KB | L2 Cache | 256 KB |
Board Design
| IGP | Slot Width | Dual-slot |
| 33 W | Thermal design power (TDP) | 150 W |
| No outputs | Display Connectors | 1x DVI 1x mini-DisplayPort |
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 |