A:Answer The card is easily replaceable, but unfortunately the 250w power supply is not. This means that you are very, very limited in the GPUs you can upgrade to. a NVIDIA 750ti SC single-fan edition (that draws power from the PCI-E, and not an external connector) is about the best you can upgrade to. Do NOT buy this computer if you're planning on upgrading GPU to do gaming, the installed PSU will not handle it and it is not replaceable.