Hi, i'm having some troubles with my new ATI x1600 Pro AGP 512 DDR2 4X/8X, I got it 2 days ago

My motherboard is ASUS P4R800-VM with an Intel Pentium 4 processor (3.0ghz) and 512 MB of RAM (Kingston DDR 400, 184 Pin DIMM ). My motherboard only supports 1.5V agp cards.

I have two monitors hooked up to it, Both VGA, but one needs the DVI adapter.

When I boot up, before it shows anything, it flickers and white strips appear, then it boots up normally, then before the Windows XP SP2 Login screen appears it flickers and shows some white strips again. The cards works fine until I play a game, and then I start seeing the textures screw up and the shadows also.

I used to have an ATI All-In-Wonder Radeon (32 mb).

When I first installed it i didn't connect the extra power supply to it, so it showed some wierd vertical colored stripes. Then I connected the power supply. And it started to work fine but it did have some flickering. I installed ATI Catylist v1.2.

So, any ideas what I should do, should I trade in the video card for a new one, due to ship damage? Install some bios drivers, that I can't seem to locate? Overheating problems?

Please help, and thanks in advance.