Re: i wanted to upgrade to i5 and maybe get more ram and ssd
good thinking. The i3-2100 is too weak for gaming. i5-2500 or 2400 is considered sweet spot and i7-2600 even better.
620s is slim so gpu upgrade needs to be low profile short bracket.
620s stock psu is 250w. Nvidia recommended psu for 1050ti is 300w.
basic psu calculator says the same Recommended PSU Wattage: 299 W
you would need to upgrade psu which is not super easy in the slim desktop. here is one 435w psu upgrade option. https://www.ebay.com/itm/401540465045
