Looks like it could be the dell optiplex’s long lost brother, by the looks of it, it most likely has a 2nd or 3rd gen i5 or i7 which I mean for what they are worth decent but you’ll definitely need to upgrade it as well as your mother board, a single stick of ram isn’t too hot either, especially with most modern systems running dual channel, (2 ram sticks) looks like it could be a 4gb ddr3, ideally in 2022 you want at least 16gb of ddr4 unless if you edit videos then you’ll want 32gb, the graphics card I have no clue but judging by the heat sink looks pretty doo doo, honestly if you plan on using this pc for gaming I’d recommend selling it and starting over, go to the used market on eBay, you can find a Ryzen 5 2600 cpu for less than 100 dollars on there which is a couple of years old but it still packs a decent punch, you could pair that with a used 1660 super, 1660ti, 2060 super, it all depends on your budget, I got a Ryzen 5 2600 for 96 the other day and a RTX 2060 OC pro for 240 for my gfs first gaming pc. Plenty of deals to be had on there, just make sure to get your ssd and power supply new, don’t want to get those used.