Plenty fine, anything under 90C is good.
I suggest you go and up the temperature target to 96C, this avoids the card throttling when it doesn't have to. Of course, you want to avoid it getting to that temperature, so make a custom fan curve that allows it to hover in the mid-80's, a fan speed of about 65-70% should do this but since you are in SLI maybe more. All of this can be done in MSI Afterburner if you don't already have it.