I recently updated to a new pc and used some parts of my old 1. But since i had enough components to make my old pc work i connected everything and tried running windows on it, but it would never find the 1TB HDD. Giving that the HDD wasn't spinning i thought that it died. But i decided to connect it to my new pc and it was working. So i tested the power supply on my old computer and it was giving 11.6V so it should be fine (on the power cable of the HDD). I even disconected most of my case fans just to test if i was using too much power and it did not help. idk the specific specs but: 8GB ram 1TB SSD I5 intel sapphire tri-x r9 290 coolermaster 620W Gigabyte P55aud3