I had experience once, when I install the newer version vga driver, it won't play certain games properly. If you can play your game before updating the driver that means is your driver's problem! Try to revert back to older vga driver if available!
The power supply is in watts not volts so ac220volt doesn't tell me anything. Windows XP will function better with more ram and 768mb is not enough , it's not about the games it's about Win XP and the amount of ram. You should have at least 2gb of ram for Win XP.
The issue could be either the power supply or the video card.
The reason it is one of those two is because when you are doing normal things like web surfing there is no problem but when you go to play your games the problem shows up and that's because of the 3d rendering that the video card has to do for the game. This 3d rendering uses more power and it makes the video card work harder. So the two parts involved are the video card and power supply. If you had another power supply that you could put in to test and see if it would run the game then you would know if it was the power supply or the video card.
first tiang when i press roll back driver it says,BAckup is not made for this driver then it opens help and support.Pls suggest me some drivers if u think it will be helpful.
inzone, Yeah i was wrond it was watt what was written in the back,
But a Cousin of mine told me my Motherboard wont support more than 768 mb of ram,that why i didnt buy that amount.
But i now have a little solution, when i put vsync force on in gothic 2 in nvidia control panel,APlication 3D settings,And enabled agp fast write and restored default bios settings now i can play for half or an hour.