I don't think sysinfo tells you anything about the power supply, but I could be wrong.
https://www.bestbuy.com/site/questions/alienware-gaming-desktop-amd-ryzen-7-series-3700x-16gb-memory-amd-radeon-rx-5700-xt-1tb-hdd-512gb-ssd-black/6398141?page=2
This one seems like the exact one I have, but I also have 1tb SSD instead of 512gb and I don't know if this one is liquid cooled like mine (yeah it's air cooled. Again though, pretty similar specs).
Other that than thought it seems pretty similar.
Some guy on there (I think it is from dell themselves) said it had a 500W power supply, and that seems to line up with other things I researched (I heard you either had 500W or 1000W)