AMD Radeon 550X 640SP vs AMD Radeon Pro 555X
What is the difference between AMD Radeon 550X 640SP and AMD Radeon Pro 555X. Find out which graphics card has better performance.
Graphics Processor (GPU)
| Lexa | GPU Name | Polaris 21 |
| Lexa PRO (215-0904018) | Model number | Polaris 21 PRO |
| GCN 4.0 | Architecture | GCN 4.0 |
| GlobalFoundries | Foundry | GlobalFoundries |
| 14 nm | Process Size | 14 nm |
| 2,200 million | Transistors | 3,000 million |
| 103 mm² | Die Size | 123 mm² |
Graphics Card
| Apr 11th, 2018 | Release Date | Jul 16th, 2018 |
| Polaris (RX 500X) | Family | Radeon Pro Mac (500X Series) |
| Active | Production | Active |
| PCIe 3.0 x8 | Bus Interface | PCIe 3.0 x8 |
Memory
| 4 GB | Memory Size | 4 GB |
| GDDR5 | Memory Type | GDDR5 |
| 64 bit | Memory Bus | 128 bit |
| 48.00 GB/s | Bandwidth | 94.08 GB/s |
Performance
| 17.14 GPixel/s | Pixel fillrate | 14.51 GPixel/s |
| 42.84 GTexel/s | Texture fillrate | 43.54 GTexel/s |
| 1,371 GFLOPS (1:1) | FP16 (half) performance | 1,393 GFLOPS (1:1) |
| 1,371 GFLOPS | FP32 (float) performance | 1,393 GFLOPS |
| 85.68 GFLOPS (1:16) | FP64 (double) performance | 87.07 GFLOPS (1:16) |
Clock Speeds
| 1500 MHz 6 Gbps effective | Memory Clock | 1470 MHz 5.9 Gbps effective |
Render Config
| 640 | Shading Units | 768 |
| 40 | TMUs | 48 |
| 16 | ROPs | 16 |
| 10 | Compute Units | 12 |
| 16 KB (per CU) | L1 Cache | 16 KB (per CU) |
| 256 KB | L2 Cache | 1024 KB |
Board Design
| IGP | Slot Width | IGP |
| 50 W | Thermal design power (TDP) | 75 W |
| 1x DVI 1x HDMI 1x DisplayPort | Display Connectors | No outputs |
| None | Power Connectors | None |
API support
| 12 (12_0) | DirectX | 12 (12_0) |
| 4.6 | OpenGL | 4.6 |
| 2.1 | OpenCL | 2.1 |
| 1.2 | Vulkan | 1.2 |
| 6.4 | Shader Model | 6.4 |