hello all...i put a hd5450 card im my Pc chips A33G MB with 4gigs of ram ,a 400w PS , win XP Home, and was running great until the card went in....now its slow to start and responds very slow, when i look at the task manager, the cpu is running at 100% sometimes lower, take the card out and all is well.
You have an old computer with an antique very very very low end motherboard with a backstreet chinese made PSU, an antique operating system, and a low end video card which was intended only for HTPC applications, and you are wondering what the problem is?
This problem can be caused by many things, but my bet is that it's either an insufficient power delivery caused by a weak, cheap PSU that lives in most PCs (possibly including yours), or over-heating caused by insufficient cooling.
The fact that your cpu goes to 100% probably mean that either over-heating or insufficient power-delivery is causing your cpu to dial its speed down to prevent a system crash or possibly hardware failure.
My suggestion is that you ask someone you trust (possibly your grandchildren) for help and suggestions, although I think that if you find out that you indeed have a cheap PSU then it's both dangerous and irresponsible not to replace it.
Dangerous also means the possibility of a catastrophic failure involving a lethal power surge to all attached components, as well as the possibility that the PSU could set fire to the surrounding materials (carpet, curtains, dust, etc), exploding 240v capacitors are very dangerous.
Doron....i thank you for your senseable answer....it runs great without the video card and i dont all that much about computers...i only installed this card to plug the hdmi to the the tv, i will see about upgrading the power supply and see what happens....Thanks Again!