HP Pavilion 555e New Case? New Power Supply?

Hi, I have the HP Pavilion 555e computer with an AMD Athlon 1.67 GHz
processor. I recently bought a PNY Geforce FX 5200 AGP video card and
opened it before realizing that my Pavilion only has a 200w power
supply, whereas I need a 250w supply. I would like to keep the card
and install it, (as its been already opened and I cannot return it).
So my question for you is: where can I got a new power supply
(preferably 300w-350w)that will fit in the Pavilion case, as I am
aware that the stock power supply is not made to be replaced by just
any power supply. If that is not possible, which it very well may not
be, I'd like to buy a new case, but I need to know what specifications
to look out for to make sure they are compatible, so that I can switch
out the guts of the computer with minimum trouble.
Thanks for all your help,
Chris

 

Get a new case with power supply of ample wattage. Most Pavilion cases are too
cramped to use higher wattage power supplies, which are physically larger, too.
If you did find a 300w power supply to fit the Pavilion chassis, you would
undoubtedly pay a premium for it, due to its small and somewhat non-standard
size.

The Pavilion (and eMachine) chassis is difficult to work with, because the
insides are so cramped... Ben Myers

 

Okay, I think I'll do that. Will any standard ATX Mid-tower case be
sufficient? Or do I need to look out for any special specifications?

 

A standard sized mid-tower (or larger) ATX case will do just fine. Anything
smaller gets you back into the same bind you are in right now with cramped case
and low wattage power supply... Ben