Ask Slashdot: How do I make a high spec PC waterproof?

jimwormold writes: I need to build a system for outdoor use, and capable of withstanding a high pressure water jet! Embedded PC I hear you cry. Well, ideally yes, however the system does a fair bit of number crunching on a GPU (GTX970) and there don't appear to be any such embedded systems available. The perfect solution will be as small as possible (ideally about 1.5x the size of a motherboard and the height will be limited to accommodate the graphics card). I'm UK based, so the ambient temperature will range from -5C to 30C, so I presume some sort of active temperature control would be useful.

I found this helpful discussion http://hardware-beta.slashdot...., but it's 14 years old. Hence I thought I'd post my question here.

Do any of you enlightened slashdotters have any insights to this or know of any products that will help me achieve my goals?