New Palit GTX 670

Hi all, yesterday i got a brand new system and everything is fine i think or am i just being paranoid?

My problem is the graphics card temps, while gaming under the default fan settings the temps reach 85 degrees and the fan is only working at 60-65%

I've played around with custom fan settings in MSI afterburner and if i set the fan to 70% the temps max out at around 70-75 degrees something i feel more comfortable with.

Could anyone here with some knowledge either tell me yes i should be worried or am i fine with leaving the fan at 70% while gaming?

Please help