AMD Radeon R9 270X vs AMD Radeon R9 M395X Mac Edition
Graphics Processor
| GPU model | Curacao | Amethyst |
|---|---|---|
| GPU variant | Curacao XT (215-0848004) | Amethyst XT |
| Architecture | GCN 1.0 | GCN 3.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 2,800 million | 5,000 million |
| Die size | 212 mm² | 366 mm² |
Graphics Card
| Release date | Oct 8th, 2013 | — |
|---|---|---|
| Generation | Volcanic Islands | — |
| Production | End-of-life | — |
| Launch price | 199 USD | — |
| Interface | PCIe 3.0 x16 | — |
| Reviews | 90 in our database | — |
| Predecessor | Sea Islands | — |
| Successor | Pirate Islands | — |
Clocks
| Base clock | 1000 MHz | — |
|---|---|---|
| Boost clock | 1050 MHz | — |
| Memory clock | 1400 MHz 5.6 Gbps effective | 1365 MHz 5.5 Gbps effective |
| GPU clock | — | 909 MHz |
Memory Configuration
| Memory size | 2 GB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 179.2 GB/s | 174.7 GB/s |
Render Configuration
| Shading units | 1280 | 2048 |
|---|---|---|
| TMUs | 80 | 128 |
| ROPs | 32 | 32 |
| Compute units | 20 | 32 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 512 KB |
Performance
| Pixel rate | 33.60 GPixel/s | 29.09 GPixel/s |
|---|---|---|
| Texture rate | 84.00 GTexel/s | 116.4 GTexel/s |
| FP32 (float) performance | 2.688 TFLOPS | 3.723 TFLOPS |
| FP64 (double) performance | 168.0 GFLOPS (1:16) | 232.7 GFLOPS (1:16) |
| FP16 (half) performance | — | 3.723 TFLOPS (1:1) |
Dimensions & Outputs
| Slot width | Dual-slot | MXM Module |
|---|---|---|
| Length | 241 mm 9.5 inches | — |
| Width | 109 mm 4.3 inches | — |
| Height | 36 mm 1.4 inches | — |
| TDP | 180 W | 250 W |
| Suggested PSU | 450 W | — |
| Outputs | 2x DVI1x HDMI1x DisplayPort | No outputs |
| Power connectors | 2x 6-pin | None |
| Board number | C631, C632 | — |
API Support & Features
| DirectX | 12 (11_1) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 6.3 |
Other Features
Mobile graphics
| Release date | — | May 5th, 2015 |
|---|---|---|
| Generation | — | Crystal System (R9 M300) |
| Production | — | End-of-life |
| Interface | — | MXM-B (3.0) |
| Predecessor | — | Solar System |
| Successor | — | Mobility Radeon |
