AMD Radeon HD 6970M Mac Edition vs ATI Radeon HD 5970
Graphics Processor
| GPU model | Blackcomb | Hemlock |
|---|---|---|
| GPU variant | Blackcomb XT (216-0811000) | Hemlock XT (215-0735075) |
| Architecture | TeraScale 2 | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 40 nm |
| Number of transistors | 1,700 million | 2,154 million |
| Die size | 212 mm² | 334 mm² |
Mobile graphics
| Release date | Aug 25th, 2011 | — |
|---|---|---|
| Generation | Vancouver (HD 6900M) | — |
| Production | End-of-life | — |
| Interface | MXM-B (3.0) | — |
| Predecessor | Manhattan | — |
| Successor | London | — |
Clocks
| GPU clock | 680 MHz | 725 MHz |
|---|---|---|
| Memory clock | 900 MHz 3.6 Gbps effective | 1000 MHz 4 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 115.2 GB/s | 128.0 GB/s |
Render Configuration
| Shading units | 960 | 1600 |
|---|---|---|
| TMUs | 48 | 80 |
| ROPs | 32 | 32 |
| Compute units | 12 | 20 |
| Cache L1 | 8 KB (per CU) | 8 KB (per CU) |
| Cache L2 | 512 KB | 512 KB |
Performance
| Pixel rate | 21.76 GPixel/s | 23.20 GPixel/s |
|---|---|---|
| Texture rate | 32.64 GTexel/s | 58.00 GTexel/s |
| FP32 (float) performance | 1,306 GFLOPS | 2.320 TFLOPS |
| FP64 (double) performance | — | 464.0 GFLOPS (1:5) |
Dimensions & Outputs
| Slot width | MXM Module | Dual-slot |
|---|---|---|
| TDP | 75 W | 294 W |
| Outputs | No outputs | 2x DVI1x mini-DisplayPort |
| Power connectors | None | 1x 6-pin + 1x 8-pin |
| Board number | C296 | C000-37 |
| Length | — | 311 mm 12.2 inches |
| Width | — | 111 mm 4.4 inches |
| Height | — | 40 mm 1.6 inches |
| Suggested PSU | — | 600 W |
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
Graphics Card
| Release date | — | Nov 18th, 2009 |
|---|---|---|
| Generation | — | Evergreen |
| Production | — | End-of-life |
| Launch price | — | 699 USD |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 74 in our database |
| Predecessor | — | Radeon R700 |
| Successor | — | Northern Islands |
