i have a Clevo P150HM for malibal with a gpu 6990m ...
when i play diablo 3 or starcraft 2 it sometimes runs in slow motion like every thing moves X2 slower than it normality does ..restarting the laptop sometimes fixes the problem..it also happens on my windows 7 aero theme closing and opening animation of windows seams laggy restarting the laptop sometimes works to fix fix the problem..using basic windows theme also gets rid of the lag. i tried installing the latest ccc but didnt help..also the problem only happens after turning on the laptop i could play all day and the game would run smoothly..
I am surprised you are having frame rate issues... how old is your laptop? If its a few years old, you may want to make sure you have plenty of free hard drive space, maybe run some virus scans and defrag your hard drive.
Also note that sometimes the game can run really slow due to the "server" you are on when you play the game. If you look at the bottom right of your screen in game you should see a small bar to the right of your skills. It shows 3 colors, green, yellow and red. Green is good, yellow is meh.. red is bad. Sometimes when I am playing the server will switch and suddenly it lags sooo bad. Just leave game and re enter a new one, check the latency to see if its at least green. Blizzard is still working on the servers to help optimize and make them faster..
Also sometimes the game can lag if your in Hell difficulty on Act 3 and there are just a TON of monsters on screen... dont worry that happens to me and my friends too and i got a decent rig myself.
But if its just your computer and it slows down in other games you play, it could be your computer.. In my opinion (if I am looking up the right model for your laptop) the specs are pretty good and shouldn't really have any issues with frame rate especially with an ATI 6990m.. It could also be your laptop is getting hot, make sure you have plenty of air flow around it.. I dont know so any feedback would help..
I linked a picture (sorry I had to google one)
I circled the latency bar.
Yes I am using MS-paint... lol donte hate.