NVIDIA GeForce 945A vs NVIDIA GeForce GTX 675M
Graphics Processor
| GPU model | GM108 | GF114 |
|---|---|---|
| Architecture | Maxwell | Fermi 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 40 nm |
| Number of transistors | unknown | 1,950 million |
| Die size | unknown | 332 mm² |
| GPU variant | — | N13E-GS1-A1 |
Mobile graphics
| Release date | Mar 13th, 2015 | Mar 22nd, 2012 |
|---|---|---|
| Generation | GeForce 900A | GeForce 600M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x8 | MXM-B (3.0) |
| Predecessor | GeForce 800A | GeForce 500M |
| Successor | — | GeForce 700M |
Clocks
| Base clock | 1006 MHz | — |
|---|---|---|
| Boost clock | 1189 MHz | — |
| Memory clock | 1253 MHz 5 Gbps effective | 750 MHz 3 Gbps effective |
| GPU clock | — | 620 MHz |
| Shader clock | — | 1240 MHz |
Memory Configuration
| Memory size | 1024 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 40.10 GB/s | 96.00 GB/s |
Render Configuration
| Shading units | 384 | 384 |
|---|---|---|
| TMUs | 24 | 64 |
| ROPs | 8 | 32 |
| SMM count | 3 | — |
| Cache L1 | 64 KB (per SMM) | 64 KB (per SM) |
| Cache L2 | 1024 KB | 512 KB |
| SM count | — | 8 |
Performance
| Pixel rate | 9.512 GPixel/s | 9.920 GPixel/s |
|---|---|---|
| Texture rate | 28.54 GTexel/s | 39.68 GTexel/s |
| FP32 (float) performance | 913.2 GFLOPS | 952.3 GFLOPS |
| FP64 (double) performance | 28.54 GFLOPS (1:32) | 79.36 GFLOPS (1:12) |
Dimensions & Outputs
| Slot width | MXM Module | MXM Module |
|---|---|---|
| TDP | 33 W | 100 W |
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 1.1 |
| Vulkan | 1.1 | — |
| CUDA | 5.0 | 2.1 |
| Shader model | 5.1 | 5.1 |
