I am using 6900xt graphics card. When I switch to ultra in games, the graphics card temperature is 80-88 degrees and the hotspot is 90-97 in a short time. Are these values normal, will it cause any problems if I use it like this?
Temps are fine, look up the thermal limit for your model on techpowerup vga bios collection.
Some games graphics settings can also overtax a card for next to none or little graphics quality improvement. Read some (name of game) graphics settings tweak guides, usually some setting can be lowered with minimum impact on quality.