Replies to post #80380 on Advanced Micro Devices Inc (AMD)

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Re: IIRC, in many cases, particularly with high-end cards, nVidia doesn't allow any deviation from reference designs, except for minor things like upgraded coolers.

I do not think this is by decree of nVidia. Most ODMs will use the reference design without modification because nVidia has done enough research in power delivery and thermal dissipation in the reference design that it is not worth the ODM's while to repeat the effort.