NVIDIA GeForce GTX 645
The GeForce GTX 645 is a GPU from NVIDIA. This chip has a bad gaming score at 9% in our GPU benchmark.
The GeForce GTX 645 has 1 GiB of memory. More memory is beneficial when gaming at high resolutions as the memory needs to store the frame buffer and all the game textures. If you run out of memory, you will experience poor performance as the GPU needs to swap data in and out of the memory as it is used.
As for rendering API support, the GeForce GTX 645 supports up to DirectX 11. In addition, in cross-platform titles, OpenGL 4.5 features are supported. Newer APIs are usually more efficient, allowing for better performance in games and better graphical effects.
Power and thermals for the NVIDIA GeForce GTX 645 are a TDP (Thermal Design Power) of 64 watts. This measures the amount of heat the GPU produces when running at 100%. This isn't a measure of power consumption, but it's a good estimate.
To figure out your graphics card specs and performance, download our free GPU Benchmark utility.