NVIDIA GeForce 945M vs NVIDIA GeForce GT 645 OEM
Graphics Processor
| GPU model | GM107 | GF114 |
|---|---|---|
| Architecture | Maxwell | Fermi 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 40 nm |
| Number of transistors | 1,870 million | 1,950 million |
| Die size | 148 mm² | 332 mm² |
Mobile graphics
| Release date | Oct 27th, 2015 | — |
|---|---|---|
| Generation | GeForce 900M | — |
| Production | End-of-life | — |
| Interface | MXM-B (3.0) | — |
| Predecessor | GeForce 800M | — |
| Successor | GeForce 10 Mobile | — |
Clocks
| Base clock | 928 MHz | — |
|---|---|---|
| Boost clock | 1020 MHz | — |
| Memory clock | 900 MHz 1800 Mbps effective | 957 MHz 3.8 Gbps effective |
| GPU clock | — | 776 MHz |
| Shader clock | — | 1552 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | DDR3 | GDDR5 |
| Memory bus width | 128 bit | 192 bit |
| Bandwidth | 28.80 GB/s | 91.87 GB/s |
Render Configuration
| Shading units | 640 | 288 |
|---|---|---|
| TMUs | 40 | 48 |
| ROPs | 16 | 24 |
| SMM count | 5 | — |
| Cache L1 | 64 KB (per SMM) | 64 KB (per SM) |
| Cache L2 | 2 MB | 384 KB |
| SM count | — | 6 |
Performance
| Pixel rate | 16.32 GPixel/s | 9.312 GPixel/s |
|---|---|---|
| Texture rate | 40.80 GTexel/s | 37.25 GTexel/s |
| FP32 (float) performance | 1,306 GFLOPS | 894.0 GFLOPS |
| FP64 (double) performance | 40.80 GFLOPS (1:32) | 74.50 GFLOPS (1:12) |
Dimensions & Outputs
| Slot width | MXM Module | Dual-slot |
|---|---|---|
| TDP | 75 W | 102 W |
| Outputs | No outputs | 2x DVI1x mini-HDMI |
| Length | — | 210 mm 8.3 inches |
| Suggested PSU | — | 300 W |
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 |
Other Features
Graphics Card
| Release date | — | Apr 24th, 2012 |
|---|---|---|
| Generation | — | GeForce 600 |
| Production | — | End-of-life |
| Interface | — | PCIe 2.0 x16 |
| Predecessor | — | GeForce 500 |
| Successor | — | GeForce 700 |
