AMD Radeon HD 6670 vs NVIDIA GeForce GT 640M LE
Graphics Processor
| GPU model | Turks | GF108 |
|---|---|---|
| GPU variant | Turks XT (215-0803000) | — |
| Architecture | TeraScale 2 | Fermi |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 40 nm |
| Number of transistors | 716 million | 585 million |
| Die size | 118 mm² | 116 mm² |
Graphics Card
| Release date | Apr 19th, 2011 | — |
|---|---|---|
| Generation | Northern Islands | — |
| Production | End-of-life | — |
| Launch price | 99 USD | — |
| Interface | PCIe 2.0 x16 | — |
| Reviews | 35 in our database | — |
| Predecessor | Evergreen | — |
| Successor | Southern Islands | — |
Clocks
| GPU clock | 800 MHz | 753 MHz |
|---|---|---|
| Memory clock | 1000 MHz 4 Gbps effective | 785 MHz 3.1 Gbps effective |
| Shader clock | — | 1505 MHz |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 64.00 GB/s | 50.24 GB/s |
Render Configuration
| Shading units | 480 | 96 |
|---|---|---|
| TMUs | 24 | 16 |
| ROPs | 8 | 4 |
| Compute units | 6 | — |
| Cache L1 | 8 KB (per CU) | 64 KB (per SM) |
| Cache L2 | 256 KB | 256 KB |
| SM count | — | 2 |
Performance
| Pixel rate | 6.400 GPixel/s | 3.012 GPixel/s |
|---|---|---|
| Texture rate | 19.20 GTexel/s | 12.05 GTexel/s |
| FP32 (float) performance | 768.0 GFLOPS | 289.0 GFLOPS |
| FP64 (double) performance | — | 24.08 GFLOPS (1:12) |
Dimensions & Outputs
| Slot width | Single-slot | — |
|---|---|---|
| Length | 168 mm 6.6 inches | — |
| TDP | 66 W | 32 W |
| Suggested PSU | 250 W | — |
| Outputs | 1x DVI1x HDMI1x VGA | No outputs |
| Power connectors | None | — |
| Board number | C334 | — |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | — | — |
| Shader model | 5.0 | 5.1 |
| CUDA | — | 2.1 |
Other Features
Mobile graphics
| Release date | — | May 4th, 2012 |
|---|---|---|
| Generation | — | GeForce 600M |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 2 in our database |
| Predecessor | — | GeForce 500M |
| Successor | — | GeForce 700M |
