I bought a more powerful graphics card (ATI Technologies Radeon X1300 Pro Video Card, PCI Express, 256MB DDR2) and want to chage out my 300 watt PSU with a 500 watt unit. My machine is a Pentium 4, 2.93 Ghz, Compaq Presario SR1250SN. I have the dimensions of my current power supply (6" wide X 3.5" tall X 5.5" Deep.) It is a 2X12 24 pin atx unit. Is there anything else I need to know about the PSU before I purchase one? I am hoping to get one for $75 or less. I may be disappointed. That may not be do-able.
If you could point me towards a particular one on Buy.Com TigerDirect or NewEgg I would be greatful.
Also, is there a specific sequence that you go through in installing the PSU and graphics card?