A:Answer My guess would be size. The graphics card is humongous and not exactly easy to install. Make sure you have more than the 342mm length before considering this product. Remember you have to actually get it in the case and with many cases that is going require some extra space to manipulate the card and line it up. Be aware of the width of this card as well, if your case is the slightest bit narrow it's likely you won't have clearance for the power.
As far the PSU answer that was given. I highly doubt that is a problem unless you got a cheap PSU or you are trying to max out the power. The card will accept up to +17% power, but even so, the FE version of this card only has a 750 Watt PSU requirement and it typically uses less power than the similarly rated 3080 from the previous gen. That being said, some intel processors are very power hungry so on an intel platform you may want to go with a 1000 watt supply.
