Graphics cards are desgined by Nvidia and amd, they release them to manufacturers in a 'reference' format, the manufacturers then choose to keep the setup given, or alter it
Sapphire may alter the Vram chips positioning for example,Palit may release it seriously overclocked and Asus like to shorten the cards, add power phases and huge damn coolers, the altering of the card itself makes it a non-reference model,
I.E. it doesn't match the original reference design provided by AMD/Nvidia
and this can cause issues for watercoolers mostly, those shiny fullcover blocks are mainly designed for reference models, and won't fit mine properly, so I have to use universal blocks if I want to W/c my non-ref cards
frozers are excellent coolers and I can't see an air cooler 'upgrade' that is going to improve things enough to justify spending the money,
Moto