Does "nvidia-drivers-510.73" works with GeForce GT 710 card?
I just got a warning: WARN: postinst Currently loaded NVIDIA modules do not match the newly installed libraries and may prevent launching GPU-accelerated applications. The easiest way to fix this is usually to reboot. ***WARNING*** You are installing a version of nvidia-drivers known not to work with a GPU of the current system. If unwanted, add the mask: echo '>=x11-drivers/nvidia-drivers-471' >> /etc/portage/package.mask