For roughly $11,000 you cold have this awesome oil cooled computer rig. This system was designed specifically to be able to keep the electronics submerged in oil. The system uses SSD for storage, so everything can be submerged. Check out the pictures of the top panel, what is going on there?
If $11,000 is too much for you to spend, you could always do it yourself with an old aquarium, like this one, but be careful, that oil can get pretty messy. There is also a happy medium too, check out this method. Its nice, clean and not too expensive.