AMD Radeon HD 6970 X2 vs AMD Radeon HD 6970M Mac Edition
Graphics Processor
| GPU model | Antilles | Blackcomb |
|---|---|---|
| GPU variant | Antilles XT (215-0807027) | Blackcomb XT (216-0811000) |
| Architecture | TeraScale 3 | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 40 nm |
| Number of transistors | 2,640 million | 1,700 million |
| Die size | 389 mm² | 212 mm² |
Graphics Card
| Release date | Never Released | — |
|---|---|---|
| Generation | Northern Islands | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
| Predecessor | Evergreen | — |
| Successor | Southern Islands | — |
Clocks
| GPU clock | 880 MHz | 680 MHz |
|---|---|---|
| Memory clock | 1375 MHz 5.5 Gbps effective | 900 MHz 3.6 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 176.0 GB/s | 115.2 GB/s |
Render Configuration
| Shading units | 1536 | 960 |
|---|---|---|
| TMUs | 96 | 48 |
| ROPs | 32 | 32 |
| Compute units | 24 | 12 |
| Cache L1 | 8 KB (per CU) | 8 KB (per CU) |
| Cache L2 | 512 KB | 512 KB |
Performance
| Pixel rate | 28.16 GPixel/s | 21.76 GPixel/s |
|---|---|---|
| Texture rate | 84.48 GTexel/s | 32.64 GTexel/s |
| FP32 (float) performance | 2.703 TFLOPS | 1,306 GFLOPS |
Dimensions & Outputs
| Slot width | Dual-slot | MXM Module |
|---|---|---|
| TDP | 375 W | 75 W |
| Suggested PSU | 750 W | — |
| Outputs | 2x DVI1x HDMI2x mini-DisplayPort | No outputs |
| Power connectors | 3x 8-pin | None |
| Board number | — | C296 |
API Support & Features
| DirectX | 11.2 (11_0) | 11.2 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.4 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | — | — |
| Shader model | 5.0 | 5.0 |
Other Features
Mobile graphics
| Release date | — | Aug 25th, 2011 |
|---|---|---|
| Generation | — | Vancouver (HD 6900M) |
| Production | — | End-of-life |
| Interface | — | MXM-B (3.0) |
| Predecessor | — | Manhattan |
| Successor | — | London |
