NVIDIA GeForce 945A vs NVIDIA GeForce GTX 645 OEM
Graphics Processor
| GPU model | GM108 | GK106 |
|---|---|---|
| Architecture | Maxwell | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | unknown | 2,540 million |
| Die size | unknown | 221 mm² |
| GPU variant | — | GK106-200-A1 |
Mobile graphics
| Release date | Mar 13th, 2015 | — |
|---|---|---|
| Generation | GeForce 900A | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x8 | — |
| Predecessor | GeForce 800A | — |
Clocks
| Base clock | 1006 MHz | — |
|---|---|---|
| Boost clock | 1189 MHz | — |
| Memory clock | 1253 MHz 5 Gbps effective | 1000 MHz 4 Gbps effective |
| GPU clock | — | 824 MHz |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 40.10 GB/s | 64.00 GB/s |
Render Configuration
| Shading units | 384 | 576 |
|---|---|---|
| TMUs | 24 | 48 |
| ROPs | 8 | 16 |
| SMM count | 3 | — |
| Cache L1 | 64 KB (per SMM) | 16 KB (per SMX) |
| Cache L2 | 1024 KB | 256 KB |
| SMX count | — | 3 |
Performance
| Pixel rate | 9.512 GPixel/s | 9.888 GPixel/s |
|---|---|---|
| Texture rate | 28.54 GTexel/s | 39.55 GTexel/s |
| FP32 (float) performance | 913.2 GFLOPS | 949.2 GFLOPS |
| FP64 (double) performance | 28.54 GFLOPS (1:32) | 39.55 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | MXM Module | Single-slot |
|---|---|---|
| TDP | 33 W | 65 W |
| Outputs | No outputs | 1x DVI1x HDMI1x DisplayPort |
| Length | — | 147 mm 5.8 inches |
| Suggested PSU | — | 250 W |
| Power connectors | — | None |
| Board number | — | P2010 SKU 20 |
API Support & Features
| DirectX | 12 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.1 | 1.1 |
| CUDA | 5.0 | 3.0 |
| Shader model | 5.1 | 5.1 |
Other Features
Graphics Card
| Release date | — | Apr 22nd, 2013 |
|---|---|---|
| Generation | — | GeForce 600 |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | GeForce 500 |
| Successor | — | GeForce 700 |
