I was looking at my mining set up and it occurred to me that I may not be giving my GPU's the chance to cool properly as the cards are all suspended on their sides via extenders.

 If they were in a gaming case they would be all on the flat with the fans drawing air from underneath them and I am sure the designers would expect that this would be a working condition for them.

 I looked up how these flat heat pipes work in Wikipedia  and it seems they either rely on gravity or wicks to return an internal working fluid to the area trying to be cooled.

 So I have deducted that indeed I am not properly cooling my GPU's as the designers have designed and might well be damaging my cards.

 Could someone with a better understanding of the cooling principles of GPU's throw some light on the subject please?

 Regards