Power Supply 101:

http://www.tomshardware.co.uk/power-supply-specifications-atx-reference,review-32338-2.html

https://www.techwalla.com/articles/how-to-fix-cddvd-drive-issues


Short history of PC power supply voltage rails:

http://www.playtool.com/pages/psurailhistory/rails.html


Calculate power supply load:

https://outervision.com/power-supply-calculator

https://www.speedguide.net/forums/showthread.php?102387-how-many-amps-does-the-average-PC-pull-from-a-wall-socket


What do power efficiency ratings mean?

https://www.avadirect.com/blog/what-do-power-supply-efficiency-ratings-actually-mean/


Power Supply recommendations and reviews:

http://johnnylucky.org/power-supplies/psu-recommendations.html