Power Supply Upgrade

[Handyman2008]

I am trying to find a more powerful psu for my HP Pavilion 7955. THe original psu is only 200w and it loads down . I have added a second HDD , a nVidia 256mb video card and a seconf DVD writer/player. It is obvious that the psu is under powered because I can here it labor under laod and the video card response to adjustments is very slow. The psu is a certain physical spec and I am having a hard time finding anything that will fit into the case. Any suggestions?
I was considering running two 200w psu's but would rather have a 350 or 400 w psu instead.
Thanks.

 

[JSanguancheu]

Can you post a few images of the current PSU and the label on it?

 

[Handyman2008]

I will post tomorrow. Thanks