GPU model | Tobago | Amethyst |
---|---|---|
GPU variant | Tobago PRO (215-0875010) | Amethyst XT |
Architecture | GCN 2.0 | GCN 3.0 |
Foundry | TSMC | TSMC |
Manufacturing process | 28 nm | 28 nm |
Number of transistors | 2,080 million | 5,000 million |
Die size | 160 mm² | 366 mm² |
Release date | May 5th, 2015 | — |
---|---|---|
Generation | Pirate Islands | — |
Production | End-of-life | — |
Interface | PCIe 3.0 x16 | — |
Predecessor | Volcanic Islands | — |
Successor | Arctic Islands | — |
Base clock | 1000 MHz | — |
---|---|---|
Boost clock | 1050 MHz | — |
Memory clock | 1625 MHz 6.5 Gbps effective | 1250 MHz 5 Gbps effective |
GPU clock | — | 723 MHz |
Memory size | 2 GB | 4 GB |
---|---|---|
Memory type | GDDR5 | GDDR5 |
Memory bus width | 128 bit | 256 bit |
Bandwidth | 104.0 GB/s | 160.0 GB/s |
Shading units | 768 | 2048 |
---|---|---|
TMUs | 48 | 128 |
ROPs | 16 | 32 |
Compute units | 12 | 32 |
Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
Cache L2 | 256 KB | 512 KB |
Pixel rate | 16.80 GPixel/s | 23.14 GPixel/s |
---|---|---|
Texture rate | 50.40 GTexel/s | 92.54 GTexel/s |
FP32 (float) performance | 1.613 TFLOPS | 2.961 TFLOPS |
FP64 (double) performance | 100.8 GFLOPS (1:16) | 185.1 GFLOPS (1:16) |
FP16 (half) performance | — | 2.961 TFLOPS (1:1) |
Slot width | Single-slot | MXM Module |
---|---|---|
Length | 165 mm 6.5 inches | — |
Width | 111 mm 4.4 inches | — |
TDP | 85 W | 75 W |
Suggested PSU | 250 W | — |
Outputs | 1x DVI1x HDMI2x mini-DisplayPort | No outputs |
Power connectors | 1x 6-pin | None |
Board number | C913-57 | C608 |
DirectX | 12 (12_0) | 12 (12_0) |
---|---|---|
OpenGL | 4.6 | 4.6 |
OpenCL | 2.0 | 2.0 |
Vulkan | 1.2 | 1.2 |
Shader model | 6.3 | 6.3 |
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 |