This is the Dell validated oem m.2 Wi-Fi card for Optiplex 7450 AIO, DP/N 8F3Y8 pic of actual card says 8265NGW on it. [IMAGE]  
I figured that as long as I am "upgrading" this Opti 7450 AIO to the level I have already, I may as well give it excellent wifi too...  And since the M.2 wifi card slot was not populated, I needed to obtain a card anyway, so I figured if this is the case, why not "AC-1200" (?) since I find at least two cards (affordably) that appear to work for this M.2 slot.. Both are AC-1200 with bluetooth...  So here I am seeking input on this ... Amazon has two, one of which uses the 8265NGW chipset, which was also what I installed in one of our users laptops (so he would stop griping to me about "...how slow this wifi is.." 'cuz he was ONLY seeing something over 400Mb/s..) Jeesh... . But at least this card showed him 866Mb/s, which helped make him go away - for now.   So... Has anyone tried this card?  Wireless-AC 8265NGW NGFF M2 Interface WiFi Adapter-Wireless-AC 1200Mbps (2.4GHz 300Mbps & 5GHz 867Mbps) Network Card with WiFi Audio Adapter (Wireless-AC 8265NGW)
BACK AGAIN... OPTIPLEX 7450 AIO - M.2 wifi