something's wrong with GPU

Hi! I have had some trouble with my laptop lately and yesterday dell replaced my systemboard. But my gpu is still bad. I play crysis 3 and get about 10-20fps. I then decided to test with 3dmark and my results are absolutely horrible!

Overall: 1670 (target:2000)
graphics: 1526 (target: 1900)
physics: 7150(target: 5300)
combined: 1159(target: 1600)

I saw a guy posted a video on youtube with the same rig, and his scores are so much higher then mine. His overall was 2344.

Any idea what can cause this? have used both the driver from dell 307 and the new nvidia 314. both give the same result. I did a clean re install yesterday, so there is not a virus. I have my laptop on the desk and elevate the back so the fan has plenty of air.

As I metioned I replaced the systembord yesterday, so starting to think it's something else wrong.

Any suggestions to what I can do?

i7-3630qm @2,4GHz
geforce gt650m 2gb
8gb ram
500gb hdd
win7

 

View attachment 92559

Here's a screenshot while playing crysis 3, with gpuz and fraps.
All settings are on minimum

 

Make sure your game is set up like this.

 

I have talked to dell, and it turns out it might be the charger. they're sending me a new one.