What style cooler is on the card? or which card is it? More importantly, what case is this in? Also, describe your current case fan congifuration. My 670 is typically in the mid 50`s and will peak at 60. I think you can likely improve your temps with an improvement in case airflow
Typical temps while gaming for the 670 with stock cooler should be 60-70C while under load. With more graphically demanding games, you can expect 70-75C which is wthin normal parameters. You card is rated to withstand much higher temps but you never want your card operating extremely hot because it is bad joo joo!!!!!