AMD Radeon HD 8990 OEM vs AMD Radeon R9 M395X Mac Edition
Graphics Processor
| GPU model | Malta | Amethyst |
|---|---|---|
| GPU variant | Malta XT (215-0849026) | Amethyst XT |
| Architecture | GCN 1.0 | GCN 3.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 4,313 million | 5,000 million |
| Die size | 365 mm² | 366 mm² |
Graphics Card
| Release date | Apr 24th, 2013 | — |
|---|---|---|
| Generation | Sea Islands | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x16 | — |
| Predecessor | Southern Islands | — |
| Successor | Volcanic Islands | — |
Clocks
| Base clock | 950 MHz | — |
|---|---|---|
| Boost clock | 1000 MHz | — |
| Memory clock | 1500 MHz 6 Gbps effective | 1365 MHz 5.5 Gbps effective |
| GPU clock | — | 909 MHz |
Memory Configuration
| Memory size | 3 GB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 384 bit | 256 bit |
| Bandwidth | 288.0 GB/s | 174.7 GB/s |
Render Configuration
| Shading units | 2048 | 2048 |
|---|---|---|
| TMUs | 128 | 128 |
| ROPs | 32 | 32 |
| Compute units | 32 | 32 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 768 KB | 512 KB |
Performance
| Pixel rate | 32.00 GPixel/s | 29.09 GPixel/s |
|---|---|---|
| Texture rate | 128.0 GTexel/s | 116.4 GTexel/s |
| FP32 (float) performance | 4.096 TFLOPS | 3.723 TFLOPS |
| FP64 (double) performance | 1,024 GFLOPS (1:4) | 232.7 GFLOPS (1:16) |
| FP16 (half) performance | — | 3.723 TFLOPS (1:1) |
Dimensions & Outputs
| Slot width | Dual-slot | MXM Module |
|---|---|---|
| Length | 307 mm 12.1 inches | — |
| TDP | 375 W | 250 W |
| Suggested PSU | 750 W | — |
| Outputs | 1x DVI4x mini-DisplayPort | No outputs |
| Power connectors | 2x 8-pin | None |
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 |
