Overclocking GPU's. Bad for the video card even if temps are well within normal?

..Are there any negatives towards the card as long as it's staying well within decent temp ranges (high 60's / low 70's)?

 

Not usually. If you have to crank the voltage pretty high it could though.

 

Its not bad as long as u it does not show artifacts or hits over 80 degrees under heavy load.

 

Depending on the overclock, you have to be careful of memory clocks as the temp for memory is often not shown.

Other than that, as long as you are stable, you should be fine. I use my GPU overclcoked to game too, and so far temps have been under control and system completely stable.

 

Memory is the thing to watch for, but if you test correctly and take your time, it's shouldn't be a problem.

As for the GPU, 99% of the time mobile GPU's are down-clocked desktop versions. So you know they were built run at higher speeds than default.

 

for ati even if they hit thermal shudown they generaly are far under thier actual danger Zone my 4850 had several thermal shutdown with the sc2 issue and they are still alive and kicking how ever i koocked the thermal pad

for nvidias we don't knwo if the 260-280 are sufering the same issue as the 8xxx serie that could kill them because they had issue with thier sodering giving up befor the thermal limit

 

ATI or should I say AMD Radeons have great overclock endurance, they don't break that easy, as for Nvidia, well according to my experience with a 6600 and 8600, over clocking them made the cards fail, nvidia cards are not very enduring for me.

 

I'm sure it was the heat that made them fail, not overclocking.

The OP is asking about overclocking while maintaining normal temps, which is perfectly safe.