AMD Radeon R9 M380 Mac Edition vs AMD Radeon R9 M390 Mac Edition
Graphics Processor
| GPU model | Strato | Pitcairn |
|---|---|---|
| GPU variant | Strato PRO | Pitcairn PRO (215-0828062) |
| Architecture | GCN 2.0 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 2,080 million | 2,800 million |
| Die size | 160 mm² | 212 mm² |
Mobile graphics
| Release date | May 5th, 2015 | May 5th, 2015 |
|---|---|---|
| Generation | Crystal System (R9 M300) | Crystal System (R9 M300) |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Predecessor | Solar System | Solar System |
| Successor | Mobility Radeon | Mobility Radeon |
Clocks
| Base clock | 900 MHz | — |
|---|---|---|
| Boost clock | 1021 MHz | — |
| Memory clock | 1568 MHz 6.3 Gbps effective | 1365 MHz 5.5 Gbps effective |
| GPU clock | — | 958 MHz |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 100.4 GB/s | 174.7 GB/s |
Render Configuration
| Shading units | 768 | 1024 |
|---|---|---|
| TMUs | 48 | 64 |
| ROPs | 16 | 32 |
| Compute units | 12 | 16 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 512 KB |
Performance
| Pixel rate | 16.34 GPixel/s | 30.66 GPixel/s |
|---|---|---|
| Texture rate | 49.01 GTexel/s | 61.31 GTexel/s |
| FP32 (float) performance | 1.568 TFLOPS | 1.962 TFLOPS |
| FP64 (double) performance | 98.02 GFLOPS (1:16) | 122.6 GFLOPS (1:16) |
Dimensions & Outputs
| TDP | unknown | 80 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | MXM Module |
| Power connectors | — | None |
| Board number | — | C608 |
API Support & Features
| DirectX | 12 (12_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 1.2 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 6.3 | 5.1 |
