OC instability ?

I've noticed that after a slightly higher overclock my laptop seems to lock up. Basically the screen turns black and the computer becomes unresponsive (while playing Oblivion ~ 10mins). Is it possible that the ac adapter is overheating or that it is not supplying enough power? Temps stay reasonably low 75c so it is not a thermal shut down. And I can't see any artifacts. The only reason I say it's the adapter is because it sizzles like mad and is burning hot to the touch.

edit- I can hear it when it is 2 meters away from me!!

 

Just a word of advice, don't overclock with the stock AC adapter. It is unable to handle even stock video car settings. I would recommend the Targus 180W AC adapter. Works great. http://forum.notebookreview.com/showthread.php?t=304865

Also, for me when I overclocked past 700mhz core, the GPU would downclock to 3d low power settings for some odd reason. My temps never exceeded 79*C. I would invest in a new, and good AC adapter.

 

same here. u can hear the music but no video.
Targus 180W AC adapter? all we need is a fatter adaptor for overclocking?
what about bios and mobo voltage limits.

 

Well if you overclock your core past 700mhz, it'll downclock for some reason. I'm not guaranteeing that it'll solve your problems.

For me I fixed all my problems by:

- Buying Targus 180W AC adapter
- Propping up my notebook during gameplay
- Switching from 64bit Vista to 32bit Vista

It'll take some trials (guess and check), and a bit of time to fix a certain problem.

 

Ok sounds good. I will try the clocks again later today when the adapter is still "cold" and see if I can go a bit longer without the dark screen. I'm fairly certain the adapter just isn't supplying enough power. I wont ruin the laptop by repeating the above mentioned scenario will I ?