AMD Radeon 550X vs AMD Radeon R9 255 OEM
Processeur graphique
| Nom du GPU | Lexa | Cape Verde |
|---|---|---|
| GPU variant | Lexa PRO (215-0904018) | Cape Verde PRX |
| Architecture | GCN 4.0 | GCN 1.0 |
| Fonderie | GlobalFoundries | TSMC |
| Taille du processus | 14 nm | 28 nm |
| Transistors | 2,200 million | 1,500 million |
| Taille des matrices | 103 mm² | 123 mm² |
Carte graphique
| Date de publication | Mar 27th, 2019 | Dec 21st, 2013 |
|---|---|---|
| Génération | Polaris | Volcanic Islands |
| Production | End-of-life | End-of-life |
| Bus interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Prédécesseur | Polaris | Sea Islands |
| Successeur | Vega | Pirate Islands |
Vitesse clock
| Base clock | 1082 MHz | 900 MHz |
|---|---|---|
| Boost clock | 1218 MHz | 930 MHz |
| Mémoire clock | 1750 MHz 7 Gbps effective | 1150 MHz 4.6 Gbps effective |
Mémoire
| Taille de la mémoire | 2 GB | 2 GB |
|---|---|---|
| Type de mémoire | GDDR5 | GDDR5 |
| Bus mémoire | 128 bit | 128 bit |
| Bande passante | 112.0 GB/s | 73.60 GB/s |
Render Config
| Shading units | 512 | 512 |
|---|---|---|
| TMUs | 32 | 32 |
| ROPs | 16 | 16 |
| Compute units | 8 | 8 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 256 KB |
Performance théorique
| Taux de pixel | 19.49 GPixel/s | 14.88 GPixel/s |
|---|---|---|
| Taux de texture | 38.98 GTexel/s | 29.76 GTexel/s |
| FP16 (half) performance | 1,247 GFLOPS (1:1) | — |
| FP32 (float) performance | 1,247 GFLOPS | 952.3 GFLOPS |
| FP64 (double) performance | 77.95 GFLOPS (1:16) | 59.52 GFLOPS (1:16) |
Board Design
| Taille Slot | Dual-slot | Dual-slot |
|---|---|---|
| Longueur | 145 mm 5.7 inches | — |
| TDP | 50 W | 65 W |
| Suggestions pour le PSU | 250 W | 250 W |
| Sorties | 1x DVI1x HDMI1x DisplayPort | No outputs |
| Connecteurs de puissance | None | 1x 6-pin |
| Board number | D090 | C750 |
Caractéristiques graphiques
| DirectX | 12 (12_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 1.2 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 6.4 | 5.1 |
