What exactly are you asking? Is it safe to adjust the fan speed/does it matter?
It is probably on an Auto mode,where it chooses how fast the fan should go based on how hot the card is.If you look at it again after you've done some gaming or something graphics intesive the speed should be higher.
It is bad to increase it to 100% for a long term affect,if you run anything at it's maximum capicity for a long time it will cause it to wear and tear more quickly.
If you want put it to 60% or 70% thats about normal for all uses but it is best to leave it on Auto cause theirs no sense in leaving it that high when it's idle.