AMD Radeon HD 6750M vs AMD Radeon HD 8870 OEM
Graphics Processor
| GPU model | Whistler | Pitcairn |
|---|---|---|
| GPU variant | Whistler PRO (216-0810005) | Pitcairn XT (215-0828047) |
| Architecture | TeraScale 2 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 716 million | 2,800 million |
| Die size | 104 mm² | 212 mm² |
Mobile graphics
| Release date | Jan 4th, 2011 | — |
|---|---|---|
| Generation | Vancouver (HD 6700M) | — |
| Production | End-of-life | — |
| Interface | MXM-A (3.0) | — |
| Predecessor | Manhattan | — |
| Successor | London | — |
Clocks
| GPU clock | 600 MHz | 1000 MHz |
|---|---|---|
| Memory clock | 800 MHz 1600 Mbps effective | 1200 MHz 4.8 Gbps effective |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR3 | GDDR5 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 25.60 GB/s | 153.6 GB/s |
Render Configuration
| Shading units | 480 | 1280 |
|---|---|---|
| TMUs | 24 | 80 |
| ROPs | 8 | 32 |
| Compute units | 6 | 20 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 512 KB |
Performance
| Pixel rate | 4.800 GPixel/s | 32.00 GPixel/s |
|---|---|---|
| Texture rate | 14.40 GTexel/s | 80.00 GTexel/s |
| FP32 (float) performance | 576.0 GFLOPS | 2.560 TFLOPS |
| FP64 (double) performance | — | 160.0 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | MXM Module | Dual-slot |
|---|---|---|
| TDP | 35 W | 175 W |
| Outputs | No outputs | 1x DVI1x HDMI2x mini-DisplayPort |
| Length | — | 241 mm 9.5 inches |
| Suggested PSU | — | 450 W |
| Power connectors | — | 2x 6-pin |
| Board number | — | C401 |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 5.1 |
Other Features
Graphics Card
| Release date | — | Jan 8th, 2013 |
|---|---|---|
| Generation | — | Sea Islands |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | Southern Islands |
| Successor | — | Volcanic Islands |
