AMD Radeon HD 6990 vs AMD Radeon Pro 455
Graphics Processor
| GPU model | Antilles | Baffin |
|---|---|---|
| GPU variant | Antilles XT (215-0807027) | Baffin PRO |
| Architecture | TeraScale 3 | GCN 4.0 |
| Foundry | TSMC | GlobalFoundries |
| Manufacturing process | 40 nm | 14 nm |
| Number of transistors | 2,640 million | 3,000 million |
| Die size | 389 mm² | 123 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 | 855 MHz |
|---|---|---|
| Memory clock | 1250 MHz 5 Gbps effective | 1270 MHz 5.1 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 160.0 GB/s | 81.28 GB/s |
Render Configuration
| Shading units | 1536 | 768 |
|---|---|---|
| TMUs | 96 | 48 |
| ROPs | 32 | 16 |
| Compute units | 24 | 12 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 1024 KB |
Performance
| Pixel rate | 26.56 GPixel/s | 13.68 GPixel/s |
|---|---|---|
| Texture rate | 79.68 GTexel/s | 41.04 GTexel/s |
| FP32 (float) performance | 2.550 TFLOPS | 1,313 GFLOPS |
| FP64 (double) performance | 637.4 GFLOPS (1:4) | 82.08 GFLOPS (1:16) |
| FP16 (half) performance | — | 1,313 GFLOPS (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 | 35 W |
| Suggested PSU | 750 W | — |
| Outputs | 1x DVI4x mini-DisplayPort | No outputs |
| Power connectors | 2x 8-pin | None |
| Board number | C206-47 | — |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 6.4 |
Other Features
Mobile graphics
| Release date | — | Oct 30th, 2016 |
|---|---|---|
| Generation | — | Radeon Pro Mac (400 Series) |
| Production | — | Active |
| Interface | — | PCIe 3.0 x8 |
