AMD Radeon HD 6770M vs NVIDIA GeForce GT 645M
Graphics Processor
| GPU model | Whistler | GK107 |
|---|---|---|
| GPU variant | Whistler XT (216-0810001) | N13P-GS |
| Architecture | TeraScale 2 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 716 million | 1,270 million |
| Die size | 104 mm² | 118 mm² |
Mobile graphics
| Release date | Jan 4th, 2011 | Oct 1st, 2012 |
|---|---|---|
| Generation | Vancouver (HD 6700M) | GeForce 600M |
| Production | End-of-life | End-of-life |
| Interface | MXM-A (3.0) | PCIe 3.0 x16 |
| Predecessor | Manhattan | GeForce 500M |
| Successor | London | GeForce 700M |
Clocks
| GPU clock | 725 MHz | 709 MHz |
|---|---|---|
| Memory clock | 900 MHz 3.6 Gbps effective | 900 MHz 1800 Mbps effective |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 57.60 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 480 | 384 |
|---|---|---|
| TMUs | 24 | 32 |
| ROPs | 8 | 16 |
| Compute units | 6 | — |
| Cache L1 | 8 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 256 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 5.800 GPixel/s | 5.672 GPixel/s |
|---|---|---|
| Texture rate | 17.40 GTexel/s | 22.69 GTexel/s |
| FP32 (float) performance | 696.0 GFLOPS | 544.5 GFLOPS |
| FP64 (double) performance | — | 22.69 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | MXM Module | — |
|---|---|---|
| TDP | 35 W | 32 W |
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 5.0 | 5.1 |
| CUDA | — | 3.0 |
