AMD Radeon R9 M390X vs AMD Radeon RX 560 896SP
Graphics Processor
| GPU model | Amethyst | Polaris 21 |
|---|---|---|
| GPU variant | Amethyst XT | Polaris 21 XL |
| Architecture | GCN 3.0 | GCN 4.0 |
| Foundry | TSMC | GlobalFoundries |
| Manufacturing process | 28 nm | 14 nm |
| Number of transistors | 5,000 million | 3,000 million |
| Die size | 366 mm² | 123 mm² |
Mobile graphics
| Release date | May 5th, 2015 | — |
|---|---|---|
| Generation | Crystal System (R9 M300) | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | Solar System | — |
| Successor | Mobility Radeon | — |
Clocks
| GPU clock | 723 MHz | — |
|---|---|---|
| Memory clock | 1250 MHz 5 Gbps effective | 1750 MHz 7 Gbps effective |
| Base clock | — | 1090 MHz |
| Boost clock | — | 1175 MHz |
Memory Configuration
| Memory size | 4 GB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 160.0 GB/s | 112.0 GB/s |
Render Configuration
| Shading units | 2048 | 896 |
|---|---|---|
| TMUs | 128 | 56 |
| ROPs | 32 | 16 |
| Compute units | 32 | 14 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 1024 KB |
Performance
| Pixel rate | 23.14 GPixel/s | 18.80 GPixel/s |
|---|---|---|
| Texture rate | 92.54 GTexel/s | 65.80 GTexel/s |
| FP16 (half) performance | 2.961 TFLOPS (1:1) | 2.106 TFLOPS (1:1) |
| FP32 (float) performance | 2.961 TFLOPS | 2.106 TFLOPS |
| FP64 (double) performance | 185.1 GFLOPS (1:16) | 131.6 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | MXM Module | Dual-slot |
|---|---|---|
| TDP | 75 W | 45 W |
| Outputs | No outputs | 1x DVI1x HDMI1x DisplayPort |
| Power connectors | None | None |
| Board number | C608 | C981-21 C994-71 |
| Length | — | 170 mm 6.7 inches |
| Suggested PSU | — | 200 W |
API Support & Features
| DirectX | 12 (12_0) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 2.1 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 6.3 | 6.4 |
Other Features
Graphics Card
| Release date | — | Jul 4th, 2017 |
|---|---|---|
| Generation | — | Polaris |
| Production | — | Active |
| Interface | — | PCIe 3.0 x8 |
| Predecessor | — | Arctic Islands |
| Successor | — | Vega |
