Hi guys I have a desktop pc ASUS CM series with intel(R) core(TM) i3-3220 @ 3.30GHz and has a GPU Geforce GT620. I was wondering is it possible to change my GPU to a higher one like PNY NVIDIA GEFORCE GTX 750 TI 2GB GF750IGTX2GEPB or PNY VGA GEFORCE GTX 750 1GB GDDR5 128 BIT LP VGA DVI-I HDMI or any suggestions? Because i recently baught NBA 2k15 and it doesn't run smooth. i even lowered the setting to its minimal but it still not running smooth. I want something that can make me play the game in higher settings or at least let me play smoothly. Thank you in advance.