If you are not doing anything GPU intensive, i would say that's a little high temps you got there.
Blow out some dust will sure help drop those temps down. Or even if you know how to remove the heatsink and apply a fresh thermal paste will help greatly drop those temps down.
That should be normal at moderate stage, try to setup your computer on another location where the environment will contribute for increasing/decreasing the temperature but the ATI r7 260/x have a nature of range about 60's Degree Celsius +.