I plan to do some upgrades and much needed refurbishment to the case in the future specs are as follows
Dell dimension 4600 case Generic alliexpress h61 motherboard I7 3770 10gb ddr3 ram Amd radeon pro wx 2100 Corsair psu 256gb ssd 320gb hdd 90mm case fan
This costed me £61 to build altogether
USB 3, and pcie 3.0! The 3770 was a good choice! Just need to upgrade the small stick of RAM to 8 so you can take advantage of the dual channel memory.
I’m going add USB 3.0 slots to my case eventually as well I’ve already got duel channel ram one 8gb and one 2gb stick but I will get another 8gb stick of ram eventually