I bought an old prebuilt HP Compact 6300 SFF and I want to upgrade it. I want to put a graphics card in it but I'm not sure if my PSU will be able to power the graphics card. I have been planning to install a low profile Zotac GTX 1650 that doesn't need external power. I'm not sure what will happen when I boot my computer after installing the graphics card. My power supply is only 240 watts.