[help] graphic probleme!!!

hi.

i just got a new graphic card to replace my gay asus N6200 256MB AGP 8x.

i have now EVGA e-GeForce 7600 GT superclocked 512MB DDR2 AGP 8x.
yeah this card own ass !!!!!!

but... the problem is :

with all game but ill take BF2 and BF2142 for exemple.

"C:\Program Files\EA GAMES\Battlefield 2\BF2.exe" +menu 1 +fullscreen 1
"C:\Program Files\EA GAMES\Battlefield 2\BF2.exe" +menu 1 +fullscreen 0

when i run game with "1" i see like a line going up
when i run game with "0" i dont have any problem

when i check video taked with fraps , i dont see the probleme ("1").
so i think the problem is my screen!

[EDIT]:
the probleme is on the desktop too !!!
list of resolution that cause problem:
960x600
1024x768
1176x664
1280x720
1280x768
1280x800 (nothing-black screen)


list of resolution that work fine:
800x600
1152x864
1280x960
1280x1024
[\EDIT]

all my game run as 1024x768 (with problem)


my pwner gaming computer:
processor: AMD sempron 3000+ 1.8Ghz
motherboard: K8V-MX
RAM: 2x 512Mb OCZ = 1Gb
1 HDD: western digital 200 Gb IDE
2 HDD: western digital 80 Gb IDE
power suply: delta power 500Watt ( cheap but do the job )
graphic card: EVGA e-GeForce 7600 GT superclocked 512MB DDR2 AGP 8x.


with my old gay sucking asus N6200 256Mb , i dont had any problem ... ( but play NEW game at LOW )


anyone have idea please ???
thx