AMD Radeon HD 6550A vs AMD Radeon HD 6630M Mac Edition
Graphics Processor
| GPU model | Pinewood | Whistler |
|---|---|---|
| GPU variant | Pinewood PRO | Whistler LP |
| Architecture | TeraScale 2 | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 40 nm |
| Number of transistors | 627 million | 716 million |
| Die size | 104 mm² | 104 mm² |
Mobile graphics
| Release date | Feb 7th, 2011 | Jan 4th, 2011 |
|---|---|---|
| Generation | All-In-One (HD 6000) | Vancouver (HD 6600M) |
| Production | End-of-life | End-of-life |
| Interface | MXM-A (3.0) | PCIe 2.0 x16 |
| Predecessor | — | Manhattan |
| Successor | — | London |
Clocks
| GPU clock | 550 MHz | 500 MHz |
|---|---|---|
| Memory clock | 800 MHz 1600 Mbps effective | 600 MHz 2.4 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 256 MB |
|---|---|---|
| Memory type | GDDR3 | GDDR5 |
| Memory bus width | 128 bit | 64 bit |
| Bandwidth | 25.60 GB/s | 19.20 GB/s |
Render Configuration
| Shading units | 480 | 480 |
|---|---|---|
| TMUs | 24 | 24 |
| ROPs | 8 | 8 |
| Compute units | 6 | 6 |
| Cache L1 | 8 KB (per CU) | — |
| Cache L2 | 256 KB | — |
Performance
| Pixel rate | 4.400 GPixel/s | 4.000 GPixel/s |
|---|---|---|
| Texture rate | 13.20 GTexel/s | 12.00 GTexel/s |
| FP32 (float) performance | 528.0 GFLOPS | 480.0 GFLOPS |
Dimensions & Outputs
| Slot width | MXM Module | — |
|---|---|---|
| TDP | 35 W | 26 W |
| Outputs | No outputs | No outputs |
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 |
