NVIDIA GeForce GTX 660M Mac Edition vs NVIDIA GeForce MX250
Graphics Processor
| GPU model | GK107 | GP108 |
|---|---|---|
| Architecture | Kepler | Pascal |
| Foundry | TSMC | Samsung |
| Manufacturing process | 28 nm | 14 nm |
| Number of transistors | 1,270 million | 1,800 million |
| Die size | 118 mm² | 74 mm² |
| GPU variant | — | N17S-G2-A1 |
Mobile graphics
| Release date | Apr 1st, 2013 | Feb 21st, 2019 |
|---|---|---|
| Generation | GeForce 600M | GeForce MX (2xx) |
| Production | End-of-life | End-of-life |
| Interface | MXM-B (3.0) | PCIe 3.0 x4 |
| Predecessor | GeForce 500M | — |
| Successor | GeForce 700M | — |
Clocks
| GPU clock | 950 MHz | — |
|---|---|---|
| Memory clock | 1250 MHz 5 Gbps effective | 1502 MHz 6 Gbps effective |
| Base clock | — | 1519 MHz |
| Boost clock | — | 1582 MHz |
Memory Configuration
| Memory size | 512 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 64 bit |
| Bandwidth | 80.00 GB/s | 48.06 GB/s |
Render Configuration
| Shading units | 384 | 384 |
|---|---|---|
| TMUs | 32 | 24 |
| ROPs | 16 | 16 |
| SMX count | 2 | — |
| Cache L1 | 16 KB (per SMX) | 48 KB (per SM) |
| Cache L2 | 256 KB | 512 KB |
| SM count | — | 3 |
Performance
| Pixel rate | 7.600 GPixel/s | 25.31 GPixel/s |
|---|---|---|
| Texture rate | 30.40 GTexel/s | 37.97 GTexel/s |
| FP32 (float) performance | 729.6 GFLOPS | 1,215 GFLOPS |
| FP64 (double) performance | 30.40 GFLOPS (1:24) | 37.97 GFLOPS (1:32) |
| FP16 (half) performance | — | 18.98 GFLOPS (1:64) |
Dimensions & Outputs
| Slot width | MXM Module | IGP |
|---|---|---|
| TDP | 50 W | 25 W |
| Outputs | No outputs | No outputs |
| Power connectors | None | None |
API Support & Features
| DirectX | 12 (11_0) | 12 (12_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.1 | 1.2 |
| CUDA | 3.0 | 6.1 |
| Shader model | 5.1 | 6.4 |
