AMD Radeon R9 270X vs AMD Radeon RX 580
Graphics Processor
| GPU model | Curacao | Polaris 20 |
|---|---|---|
| GPU variant | Curacao XT (215-0848004) | Polaris 20 XTX (215-0910038) |
| Architecture | GCN 1.0 | GCN 4.0 |
| Foundry | TSMC | GlobalFoundries |
| Manufacturing process | 28 nm | 14 nm |
| Number of transistors | 2,800 million | 5,700 million |
| Die size | 212 mm² | 232 mm² |
Graphics Card
| Release date | Oct 8th, 2013 | Apr 18th, 2017 |
|---|---|---|
| Generation | Volcanic Islands | Polaris |
| Production | End-of-life | Active |
| Launch price | 199 USD | 229 USD |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Reviews | 90 in our database | 52 in our database |
| Predecessor | Sea Islands | Arctic Islands |
| Successor | Pirate Islands | Vega |
| Current price | — | Amazon / Newegg |
Clocks
| Base clock | 1000 MHz | 1257 MHz |
|---|---|---|
| Boost clock | 1050 MHz | 1340 MHz |
| Memory clock | 1400 MHz 5.6 Gbps effective | 2000 MHz 8 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 8 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 179.2 GB/s | 256.0 GB/s |
Render Configuration
| Shading units | 1280 | 2304 |
|---|---|---|
| TMUs | 80 | 144 |
| ROPs | 32 | 32 |
| Compute units | 20 | 36 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 2 MB |
Performance
| Pixel rate | 33.60 GPixel/s | 42.88 GPixel/s |
|---|---|---|
| Texture rate | 84.00 GTexel/s | 193.0 GTexel/s |
| FP32 (float) performance | 2.688 TFLOPS | 6.175 TFLOPS |
| FP64 (double) performance | 168.0 GFLOPS (1:16) | 385.9 GFLOPS (1:16) |
| FP16 (half) performance | — | 6.175 TFLOPS (1:1) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 241 mm 9.5 inches | 241 mm 9.5 inches |
| Width | 109 mm 4.3 inches | — |
| Height | 36 mm 1.4 inches | — |
| TDP | 180 W | 185 W |
| Suggested PSU | 450 W | 450 W |
| Outputs | 2x DVI1x HDMI1x DisplayPort | 1x HDMI3x DisplayPort |
| Power connectors | 2x 6-pin | 1x 8-pin |
| Board number | C631, C632 | C940, D009-04 |
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 |
