AMD Radeon HD 6990 vs AMD Radeon R9 M390X
Graphics Processor
| GPU model | Antilles | Amethyst |
|---|---|---|
| GPU variant | Antilles XT (215-0807027) | Amethyst XT |
| Architecture | TeraScale 3 | GCN 3.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 2,640 million | 5,000 million |
| Die size | 389 mm² | 366 mm² |
Graphics Card
| Release date | Mar 8th, 2011 | — |
|---|---|---|
| Generation | Northern Islands | — |
| Production | End-of-life | — |
| Launch price | 699 USD | — |
| Interface | PCIe 2.0 x16 | — |
| Reviews | 47 in our database | — |
| Predecessor | Evergreen | — |
| Successor | Southern Islands | — |
Clocks
| GPU clock | 830 MHz | 723 MHz |
|---|---|---|
| Memory clock | 1250 MHz 5 Gbps effective | 1250 MHz 5 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 160.0 GB/s | 160.0 GB/s |
Render Configuration
| Shading units | 1536 | 2048 |
|---|---|---|
| TMUs | 96 | 128 |
| ROPs | 32 | 32 |
| Compute units | 24 | 32 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 512 KB |
Performance
| Pixel rate | 26.56 GPixel/s | 23.14 GPixel/s |
|---|---|---|
| Texture rate | 79.68 GTexel/s | 92.54 GTexel/s |
| FP32 (float) performance | 2.550 TFLOPS | 2.961 TFLOPS |
| FP64 (double) performance | 637.4 GFLOPS (1:4) | 185.1 GFLOPS (1:16) |
| FP16 (half) performance | — | 2.961 TFLOPS (1:1) |
Dimensions & Outputs
| Slot width | Dual-slot | MXM Module |
|---|---|---|
| Length | 310 mm 12.2 inches | — |
| Width | 115 mm 4.5 inches | — |
| Height | 40 mm 1.6 inches | — |
| TDP | 375 W | 75 W |
| Suggested PSU | 750 W | — |
| Outputs | 1x DVI4x mini-DisplayPort | No outputs |
| Power connectors | 2x 8-pin | None |
| Board number | C206-47 | C608 |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 6.3 |
Other Features
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 |
