9800M GTS Artifacting

I've been using a 660/1650/850 OC on my 9800M GTS, but I saw what I thought might be artifacting when running Furmark today. I found that ATITool had a good artifacting detector so I installed it and found out I was definitely artifacting! Could this long term artifacting have caused hardware damage?

Are all you high overclockers sure you're not artifacting at those high clocks?

Another thing. I am stable at 650/1625 and also at 675+/1625 but what is the effect of ditching the 1:2.5 ratio?

Edit: I discovered that, at least with NVidia's overclocking software, the shaders are in increments of 50MHz, so the highest 1:2.5 ratio clocks I can use are 640/1600.

 

Artifacting usually happens when the memory clocks are too high, just reduce them

 

Naw it is the shaders not the memory in my case.

 

I'm good on 700/1700/900. Can push a little higher for benchmarking. Using the latest official Nvidia drivers.

surprised that you artifact at a lower OC than mine.

 

I run 700/1750/900 without issue. I can go to 715/1800/950 but you can tell it is right on the edge there. I doen't overheat but it just can't take anymore and artificats.

 

I can run at least 700/1600 (I'm not trying to push the memory right now.) but what would a 2.2857:1 ratio do to performance?