AMD Radeon HD 7870 XT vs AMD Radeon R9 M485X
What is the difference between AMD Radeon HD 7870 XT and AMD Radeon R9 M485X. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Tahiti | GPU Name | Amethyst |
| Tahiti LE (215-0821122) | Model number | Amethyst XT |
| GCN 1.0 | Architecture | GCN 3.0 |
| TSMC | Foundry | TSMC |
| 28 nm | Process Size | 28 nm |
| 4,313 million | Transistors | 5,000 million |
| 352 mm² | Die Size | 366 mm² |
Graphics Card
| Nov 19th, 2012 | Release Date | May 15th, 2016 |
| Southern Islands (HD 7800) | Family | Crystal System (R9 M400) |
| End-of-life | Production | Active |
| Northern Islands | Predecessor | Solar System |
| PCIe 3.0 x16 | Bus Interface | MXM-B (3.0) |
Memory
| 2 GB | Memory Size | 8 GB |
| GDDR5 | Memory Type | GDDR5 |
| 256 bit | Memory Bus | 256 bit |
| 192.0 GB/s | Bandwidth | 160.0 GB/s |
Performance
| 31.20 GPixel/s | Pixel fillrate | 23.14 GPixel/s |
| 93.60 GTexel/s | Texture fillrate | 92.54 GTexel/s |
| 2.995 TFLOPS | FP32 (float) performance | 2.961 TFLOPS |
| 748.8 GFLOPS (1:4) | FP64 (double) performance | 185.1 GFLOPS (1:16) |
Clock Speeds
| 1500 MHz 6 Gbps effective | Memory Clock | 1250 MHz 5 Gbps effective |
Render Config
| 1536 | Shading Units | 2048 |
| 96 | TMUs | 128 |
| 32 | ROPs | 32 |
| 24 | Compute Units | 32 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 512 KB | L2 Cache | 512 KB |
Board Design
| Dual-slot | Slot Width | MXM Module |
| 185 W | Thermal design power (TDP) | 250 W |
| 1x DVI 1x HDMI 2x mini-DisplayPort | Display Connectors | No outputs |
| 2x 6-pin | Power Connectors | None |
API support
| 12 (11_1) | DirectX | 12 (12_0) |
| 4.6 | OpenGL | 4.6 |
| 1.2 | OpenCL | 2.0 |
| 1.2 | Vulkan | 1.2 |
| 5.1 | Shader Model | 6.3 |