AMD Radeon R9 280X vs AMD Radeon R9 285X
What is the difference between AMD Radeon R9 280X and AMD Radeon R9 285X. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Tahiti | GPU Name | Tonga |
| Tahiti XTL (215-0821065) | Model number | Tonga 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
| Oct 8th, 2013 | Release Date | Never Released |
| Volcanic Islands (R9 200) | Family | Volcanic Islands (R9 200) |
| End-of-life | Production | End-of-life |
| Sea Islands | Predecessor | Sea Islands |
| PCIe 3.0 x16 | Bus Interface | PCIe 3.0 x16 |
Memory
| 3 GB | Memory Size | 3 GB |
| GDDR5 | Memory Type | GDDR5 |
| 384 bit | Memory Bus | 384 bit |
| 288.0 GB/s | Bandwidth | 264.0 GB/s |
Performance
| 32.00 GPixel/s | Pixel fillrate | 32.06 GPixel/s |
| 128.0 GTexel/s | Texture fillrate | 128.3 GTexel/s |
| 4.096 TFLOPS | FP32 (float) performance | 4.104 TFLOPS |
Clock Speeds
| 1500 MHz 6 Gbps effective | Memory Clock | 1375 MHz 5.5 Gbps effective |
Render Config
| 2048 | Shading Units | 2048 |
| 128 | TMUs | 128 |
| 32 | ROPs | 32 |
| 32 | Compute Units | 32 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 768 KB | L2 Cache | 768 KB |
Board Design
| Dual-slot | Slot Width | Dual-slot |
| 275 mm 10.8 inches | Length | 267 mm 10.5 inches |
| 250 W | Thermal design power (TDP) | 200 W |
| 600 W | Suggested PSU | 550 W |
| 2x DVI 1x HDMI 1x DisplayPort | Display Connectors | 2x DVI 1x HDMI 1x DisplayPort |
| 1x 6-pin + 1x 8-pin | Power Connectors | 1x 6-pin + 1x 8-pin |
| C386 | Board Number | C765 |
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 |