For reference, Micron rates its GDDR5, GDDR5X and GDDR6 memory chips with a Maximum Junction Temperature (TJ Max or Tjunction Max) of 100C (degrees Celsius). The typical recommended operating temperatures ranges between 0C to 95C. 1. if you run 1440 save some money go for a 3080. 2. 4K 3090 shine , it crush all cards the only one thats close is the 3080 but with way less vram the 20xx series no one close. 3. you need a very good cpu with great ipc and good bins, 5900x 5950x 11900k kf , 10900k is good 2 more cores then 11900k but not as good ipc.