AMD Radeon HD 6770M vs ATI Mobility Radeon HD 4850
Graphics Processor
| GPU model | Whistler | M98 |
|---|---|---|
| GPU variant | Whistler XT (216-0810001) | — |
| Architecture | TeraScale 2 | TeraScale |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 55 nm |
| Number of transistors | 716 million | 956 million |
| Die size | 104 mm² | 256 mm² |
Mobile graphics
| Release date | Jan 4th, 2011 | Jan 9th, 2009 |
|---|---|---|
| Generation | Vancouver (HD 6700M) | M9x (Mobility HD 4800) |
| Production | End-of-life | End-of-life |
| Interface | MXM-A (3.0) | PCIe 2.0 x16 |
| Predecessor | Manhattan | M8x |
| Successor | London | Manhattan |
| Reviews | — | 2 in our database |
Clocks
| GPU clock | 725 MHz | 500 MHz |
|---|---|---|
| Memory clock | 900 MHz 3.6 Gbps effective | 850 MHz 1700 Mbps effective |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 57.60 GB/s | 54.40 GB/s |
Render Configuration
| Shading units | 480 | 800 |
|---|---|---|
| TMUs | 24 | 40 |
| ROPs | 8 | 16 |
| Compute units | 6 | 10 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 5.800 GPixel/s | 8.000 GPixel/s |
|---|---|---|
| Texture rate | 17.40 GTexel/s | 20.00 GTexel/s |
| FP32 (float) performance | 696.0 GFLOPS | 800.0 GFLOPS |
| FP64 (double) performance | — | 160.0 GFLOPS (1:5) |
Dimensions & Outputs
| Slot width | MXM Module | — |
|---|---|---|
| TDP | 35 W | unknown |
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 11.2 (11_0) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 4.4 | 3.3 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | — | — |
| Shader model | 5.0 | 4.1 |
