A:Answer You will definitely need a power supply upgrade, as the 600 Watt included is too small for a 3090. That will probably involve taking the machine apart to re-run all the cables. You just have to determine if you want to go through the trouble involved. Also, be sure to measure the 3090 card you are getting vs. the case, as a 3090 is much larger than the card you get with this case.