Windows 7: HELP! Graphic card issue

Hello. Recently I bought Gigabyte HD 4650 1gb agp 8x card. I unistalled drivers for my old card, removed the old card, put this new card, and plugged in everything. I turned on my pc, installed drivers and directx from cd, and restarted. But i then i noticed some problems.
First, Aero looks weird(picture: http://oi56.tinypic.com/2qu87xz.jpg), so i turned it off. Second, in game scenes and game itself works perfectly, but intros, and other prerendered scenes are really slow and laggy(1 fps!).
Third, when i start playing some game, it lags a bit but after a few seconds it stops and works perfect.
Fourth, some games don't show graphics correctly. Examples:
Assassins creed 2(first scene): http://i51.tinypic.com/16c9kzp.png
NFS Carbon(if i set visual treatment on high, otherwise it works normally): http://i53.tinypic.com/21e5kb7.pn
Also, I noticed that Catalyst Control Center doesn't show SmartGart and VPU recover tab, and I think they should be there.
I installed new drivers, installed newer version of directx, didn't helped. I removed drivers, same thing, i played with some options in Catalyst and ingame options, nothing. I changed some compatibilty stuff in windows, same thing. Please help, I really don't understand why it doesn't works properly. I meet all the requirements for this card, and this problems really frustrates me. Thanks in advance

Hi, welcome to the forums

Firstly, when you say "new drivers" are you referring to the one's provided on the install CD/DVD? If not then download the latest and see if that helps.

Secondly, for uninstalling drivers I'd recommend using Driver Sweeper to completely eradicate any trace of the previous driver and see if that helps.


OS

This is the driver for that card seeing as it is AGP,

AMD Catalyst

Update DirectX from the website, that DX file on the disk could be old or bad.

Hi, i unistalled drivers and removed leftovers with driversweeper, didn't helped. I installed older hotfix drivers(11.1) which fixed aero, except that sometimes i still see dots instead of text in upper left corner. About the newest hotfix drivers(11.6), they don't work, after install I get atikdmag.sys bsod at startup every time(fixed with system recovery). But the main problem is with violet graphics. As I mentioned above, it happens on only some games, like assassins creed 2, assassins creed brotherhood, burnout paradise and nfs carbon if I put visual treatment on high. Other games, like Assassins creed 1, mass effect 2, Darksiders work fine. Please help me with this problem, I don't know what to do anymore.