Paradoxale :
i found an gtx 780 for 440$ and one for 650$
The differences are:
the 650$ has a stream of 2880 compared to 2304,
and 876 MHz compared to 889 Mhz
The 650$ is a gtx 780 ti, i dont know what the differences are, these were the 2 i spotted.
the r9 280x costs 300$
the gtx 770 284$
Any suggestions?
The "Ti" Edition of Nvidia GPUs means they're unlocked or just plain faster, but specs in GPUs are nearly just NOTHING to compare, for example, you can't compare two different GPUs by their architecture, because its all different, which means its VERY hard to just compare it on paper(Not recommended), you could have a GPU with just 512MB of ram and still play games on high/ultra settings, and specific specs like Stream Processors and CUDA Cores ARE NOT the same. It all goes down to what sort of games you want to play. Games like BF4 will be used on the Mantle API, which is likely to give a performance boost, and PhysX(Not widely used), there's AMD EyeInfinity, and then there's... NVIDIA's side, They have G-Sync, so if you hate breaking frames you'll need a G-Sync Card, which is NVIDIA's GTX Series GPU of 650 and above, but worry not! There's Free-Sync, its still in development, but I think AMD will perfect it. Also, OpenCL is noted to perform better on AMD Cards. OpenGL and DirectX are just graphics engines/APIs, so while OpenGL may be faster than DirectX, there's going to be no difference whether or not NVIDIA Cards run better than AMD Cards on a specific API(Excluding Mantle of course), because its all different and performance is different also.