Shortly after building my latest computer I noticed the case was staying quite hot, the power supply was showing around 125F and it seemed that the fans were just not keeping the system cooled off like I wanted. 125F isn’t too hot for operation, but that temp will cause the PS to die much faster than if it were kept at or around room temp (75f-80f). I did some research on the internet to determine the most effective way to cool electronic gear like the PS. I soon came across the idea that most large electrical transformers use mineral oil to keep them cool, so I started researching how to accomplish this. The Basic Idea A power supply has a lot of different components that generate heat while in operation, especially while under a load. The mineral oil doesn’t conduct electricity and therefore will not cause any shorts while at the same time absorbing the heat from all components keeping them at or around the same temp as the oil. After a little more research I find you can buy ready made power supplies that use this technology already, but they are much more expensive. The answer… I must build / modify my own. Bit-Tech.net - Truly an inspiring site and group of people!