I am planning to renovate an old Compaq Presario 7478 prebuilt into a "sleeper" PC. This seems to be the best category for this topic, given as its a prebuilt pc. It currently has an AMD K6-III 533 MHz and 64 MB of RAM. Does anybody know of any concerns about using this particular chassis (I think its at least MicroATX)? I plan to fit a B450 Mobo, with a spare AMD Ryzen 3 2200G, 8 GB of RAM, and a SATA SSD that I have lying around. It has no cooling besides the PSU, so I am concerned about heat. Advice? Have any of you done sleepers before? Here is an image. I have only the tower.