this is an invention that donny rigged up one night when using his computer a lot and trying not to let it heat up too much for whatever reason.
i got home and was in some sort of unknown state (as i am now) and proceded to attempt to draw an informational sketch to explain exactly the macguyvering he had done, upon re-reading the instructions just now i have added extra text in windows paint. probs best to click the image to enlarge and see clearer yeah. thats it thats all.