Hello again,
I finally managed to overclock my 7670M and I want to share results with you guys.
I'm not using any cooler and I was thinking to overclock after buy a good cooler but couldn't resist.

Btw, I only tested in 3D Mark 11 and not in games, GPU temperature didn't up to 62 degrees. I also disabled Intel Turbo Boost because like you guys said, it's causing too overheat. I lost some 300-400 Physics Score because of that. Like I care.
Anyway, here the results:
Without overclock (600-900):
http://www.3dmark.com/3dm11/5882623Overclock - 700/1000:http://www.3dmark.com/3dm11/5882627Overclock - 750/1050 (most stable)http://www.3dmark.com/3dm11/5882631Overclock - 780/1170It doesn't have benchmark score because even on first test, there was already some black spots in the screen and I instantly alt+f4 to preventing any error (btw, my gpu hasn't damaged, has it?

I tried on some games with default clock and I don't get any black spots).
Overclock - 750/1100This doesn't have too because it gave to me CTD on the last test and I couldn't get score. I don't know what problem is cause it. GPU temperature was normal, maybe the overclock was too much or just the program has crashed. Nevertheless, I didn't test again.
Like I said, I tested only in 3D Mark 11. With 750/1050 and 1363 graphic score, it surpass most the 6770M and almost catch up the 7690M XT. Personally, I'm very satisfied. 750/1050 seems stable enough. My GPU has DDR3 memory so I think if you have GDRR3-5, you will get more score and much more chance of overclocking.
I hope it will help a little. I will post when I test with other clock values. Thank you very much and have a wonderful day.
This post has been edited by zenyxia: Feb 11 2013, 04:06 PM