Problem with GeForce 8400GS

Hello,

I have a problem with my video card and is not to be, the problem is to install my video card GeForce 8400 GS 512Mb on my computer, I have a machine-armed and has D102GGC2 an Intel motherboard that has an integrated ATI X200 128MB, Pentium 4 HT processor at 3.2 GHz, two of a 1GB DDR 512 and another, I have two hard drives and a 250GB SATA another IDE 160GB, so good in the problem is that the card is installed and run video games and so on. and the sound so strange as it sounds when connected to the matrix , I do not know if anyone can help me because the card is new.

I would say that it can be a problem of driver, so the audio updates and download the latest nvidia driver, the other is that you could have said about your power, maybe not giving him his ability to run the system, because even though this humble card is low-end, representing an equal consumption of approximately 25Watts extras for power.
Another thing would clean the registry of windows and reinstall everything, or just format and start again.

I have this card and the 256MB install on my pc and 0 problems, that if a power of 520W generic and update all the drivers.

Thanks for the reply, drivers are up-to-date. What would be the other reason?