Power Supply



Below is supposedly a photo of what my pc looks like

My pc is actually a VGC-RA825GY Sony VAIO. I want to remove the original Power Supply and replace it with a new one I purchased. The size and cables all work out but I have no idea how to remove the power supply. I can’t even see my motherboard properly because of the stupid behemoth metal tumor hindering my access. Is there any way to remove it properly or transfer the components to another case without damaging it?

The main goal of me replacing the power supply is so that my pc will be compatible with better video cards that are out. Currently, the stock power supply is only 350watt. I think the max that it could support is either a x1300 or x1600. I am not quite sure. Are there any other video cards I could use with the stock power supply?