the new gpu and cpu fans last for years..there rated in hours...not how fast the fan spins. the 30 percent speed is too keep the cards quiet...lot people complained on the older cards how loud they were. the newer card 80-90c is the max temp for them. it never a good thing to get a chip near it failing temp or voltage. i use ms afterburner for all my games..i have the card fan profile to max the fans out around 50c.
Thanks for the reply and sorry for the long response time i had lost the email to this post.