GeForce GT 645 OEM vs 945M
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 664 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 5.15 | no data |
| Architecture | Maxwell (2014−2017) | Fermi 2.0 (2010−2014) |
| GPU code name | GM107 | GF114 |
| Market segment | Laptop | Desktop |
| Release date | 27 October 2015 (9 years ago) | 24 April 2012 (13 years ago) |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 640 | 288 |
| Core clock speed | 928 MHz | 776 MHz |
| Boost clock speed | 1020 MHz | no data |
| Number of transistors | 1,870 million | 1,950 million |
| Manufacturing process technology | 28 nm | 40 nm |
| Power consumption (TDP) | 75 Watt | 102 Watt |
| Texture fill rate | 40.80 | 37.25 |
| Floating-point processing power | 1.306 TFLOPS | 0.894 TFLOPS |
| ROPs | 16 | 24 |
| TMUs | 40 | 48 |
| L1 Cache | 320 KB | 384 KB |
| L2 Cache | 2 MB | 384 KB |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Laptop size | medium sized | no data |
| Bus support | PCI Express 3.0 | no data |
| Interface | MXM-B (3.0) | PCIe 2.0 x16 |
| Length | no data | 210 mm |
| Width | no data | 2-slot |
| Supplementary power connectors | None | no data |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | DDR3 | GDDR5 |
| Maximum RAM amount | 2 GB | 1 GB |
| Memory bus width | 128 Bit | 192 Bit |
| Memory clock speed | 900 MHz | 957 MHz |
| Memory bandwidth | 28.8 GB/s | 91.87 GB/s |
| Shared memory | - | - |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | No outputs | 2x DVI, 1x mini-HDMI |
| HDMI | - | + |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| GPU Boost | 2.0 | no data |
| Optimus | + | - |
| GameWorks | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 12 (11_0) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.5 | 4.6 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.1.126 | N/A |
| CUDA | + | 2.1 |
Pros & cons summary
| Recency | 27 October 2015 | 24 April 2012 |
| Maximum RAM amount | 2 GB | 1 GB |
| Chip lithography | 28 nm | 40 nm |
| Power consumption (TDP) | 75 Watt | 102 Watt |
GeForce 945M has an age advantage of 3 years, a 100% higher maximum VRAM amount, a 42.9% more advanced lithography process, and 36% lower power consumption.
We couldn't decide between GeForce 945M and GeForce GT 645 OEM. We've got no test results to judge.
Be aware that GeForce 945M is a notebook graphics card while GeForce GT 645 OEM is a desktop one.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
