Ive been using a laptop for over 5 years and Ive completely forgot about what PSU ive bought long time ago, now ive decided to build a new gaming system. Since I have my 12yo desktop pc, I wanted to re-use its Zallman Z11 case. There is also a PSU in this case, Its for me unknown brand called ACE power, its 600 watt PSU unit. This unit powered system with Radeon HD 4870 with Phenom II X4 955, for 7 years (it has manufacture date 2013 on the box). Ive stopped using that PC when I went to university and bought a laptop, another reason was failing GPU that probably failed due to overheating (Only now Ive found stone hard remains of paste), Ive fixed GPU by backing it and applied new paste, it works now but still overheats a lot (idle temp. is around 55°C). PSU is quite heavy and PC was generating enough heat to warm whole room in the winter, I dont know if it was its fault or just combination of 150 wat GPU and 125 watt CPU. Shoul I use this PSU or just throw it away? What PSU should I use for combination of I5-9500 cpu, Nvidia 1650S and basic peripherals (2x HDD, 1x SSD,DVD-rom)?