AMD Radeon R7 250X vs AMD Radeon RX 550X
Graphics Processor
| GPU model | Cape Verde | Lexa |
|---|---|---|
| GPU variant | Cape Verde XT | Lexa PRO (215-0904018) |
| Architecture | GCN 1.0 | GCN 4.0 |
| Foundry | TSMC | GlobalFoundries |
| Manufacturing process | 28 nm | 14 nm |
| Number of transistors | 1,500 million | 2,200 million |
| Die size | 123 mm² | 103 mm² |
Graphics Card
| Release date | Feb 13th, 2014 | Dec 16th, 2018 |
|---|---|---|
| Generation | Volcanic Islands | Polaris |
| Production | End-of-life | End-of-life |
| Launch price | 99 USD | — |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x8 |
| Predecessor | Sea Islands | Polaris |
| Successor | Pirate Islands | Vega |
Clocks
| GPU clock | 950 MHz | — |
|---|---|---|
| Memory clock | 1125 MHz 4.5 Gbps effective | 1500 MHz 6 Gbps effective |
| Base clock | — | 1100 MHz |
| Boost clock | — | 1183 MHz |
Memory Configuration
| Memory size | 1024 MB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 72.00 GB/s | 96.00 GB/s |
Render Configuration
| Shading units | 640 | 512 |
|---|---|---|
| TMUs | 40 | 32 |
| ROPs | 16 | 16 |
| Compute units | 10 | 8 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 512 KB |
Performance
| Pixel rate | 15.20 GPixel/s | 18.93 GPixel/s |
|---|---|---|
| Texture rate | 38.00 GTexel/s | 37.86 GTexel/s |
| FP32 (float) performance | 1,216 GFLOPS | 1,211 GFLOPS |
| FP64 (double) performance | 76.00 GFLOPS (1:16) | 75.71 GFLOPS (1:16) |
| FP16 (half) performance | — | 1,211 GFLOPS (1:1) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 210 mm 8.3 inches | 145 mm 5.7 inches |
| TDP | 80 W | 50 W |
| Suggested PSU | 250 W | 250 W |
| Outputs | 1x DVI1x HDMI2x mini-DisplayPort | 1x DVI1x HDMI1x DisplayPort |
| Power connectors | 1x 6-pin | None |
| Board number | C441, C698 | D090 |
API Support & Features
| DirectX | 12 (11_1) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 6.4 |
