NVIDIA is moving Kepler GPUs towards legacy status, which means they'll be dropped from newer drivers starting at v470. 

It's been nine years since NVIDIA announced its GeForce GTX 600 series of graphics cards, but the official support for GPUs based on a Kepler graphics chip (GeForce GTX 700/600 series) , will be stopped after the arrival of the R470 drivers. You'll be able to see that confirmed in the table below, which is available in the manufacturer's official support documents. Kepler enabled the GTX 600/700 series, which many will remember for the back then powerful GeForce GTX 780 Ti 6 GB GDDR5, which debuted an NVIDIA GK110B graphics chip in a 28nm manufacturing process from TSMC, offering a total of 2880 Shading Cores, 240 TMUs and 48 ROPs at a Base / Turbo frequency of 875/928 MHz. Together with its 384-bit memory bus, it gave a bandwidth of 336.6 GB / s, with a TDP of 250W.

Please do take note that the GeForce GTX 750 Ti and the GeForce GTX 750 are not based on the Kepler architecture, but on the Maxwell architecture and, therefore, will not be left without support after the R470 drivers.