RTX A4000 vs GeForce GT 645 OEM
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 56 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 25.01 |
| Architecture | Fermi 2.0 (2010−2014) | Ampere (2020−2024) |
| GPU code name | GF114 | GA104 |
| Market segment | Desktop | Workstation |
| Release date | 24 April 2012 (12 years ago) | 12 April 2021 (3 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 | 288 | 6144 |
| Core clock speed | 776 MHz | 735 MHz |
| Boost clock speed | no data | 1560 MHz |
| Number of transistors | 1,950 million | 17,400 million |
| Manufacturing process technology | 40 nm | 8 nm |
| Power consumption (TDP) | 102 Watt | 140 Watt |
| Texture fill rate | 37.25 | 299.5 |
| Floating-point processing power | 0.894 TFLOPS | 19.17 TFLOPS |
| ROPs | 24 | 96 |
| TMUs | 48 | 192 |
| Tensor Cores | no data | 192 |
| Ray Tracing Cores | no data | 48 |
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).
| Interface | PCIe 2.0 x16 | PCIe 4.0 x16 |
| Length | 210 mm | 241 mm |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | no data | 1x 6-pin |
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 | GDDR5 | GDDR6 |
| Maximum RAM amount | 1 GB | 16 GB |
| Memory bus width | 192 Bit | 256 Bit |
| Memory clock speed | 957 MHz | 1750 MHz |
| Memory bandwidth | 91.87 GB/s | 448.0 GB/s |
Connectivity and outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 2x DVI, 1x mini-HDMI | 4x DisplayPort 1.4a |
| HDMI | + | - |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 12 Ultimate (12_2) |
| Shader Model | 5.1 | 6.7 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | N/A | 1.3 |
| CUDA | 2.1 | 8.6 |
Pros & cons summary
| Recency | 24 April 2012 | 12 April 2021 |
| Maximum RAM amount | 1 GB | 16 GB |
| Chip lithography | 40 nm | 8 nm |
| Power consumption (TDP) | 102 Watt | 140 Watt |
GT 645 OEM has 37.3% lower power consumption.
RTX A4000, on the other hand, has an age advantage of 8 years, a 1500% higher maximum VRAM amount, and a 400% more advanced lithography process.
We couldn't decide between GeForce GT 645 OEM and RTX A4000. We've got no test results to judge.
Be aware that GeForce GT 645 OEM is a desktop card while RTX A4000 is a workstation one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
