I've never replaced a graphics card before. I could use some help in the right direction.
I have a Dell Studio 540. Intel 2 Quad core @ 2.33 and 4gb RAM. The original PSU and my Radeon HD 5450 were replaced with a free PSU and a Geforce6200LE by a friend after they failed.
My power supply is 400 W, and it says 12v1 is 16A an 12v2 is 17A ( whatever that means ). Christmas is coming, and I would prefer to not have to replace the power supply AND graphics card.
I want to play WoW on high to ultra at 1600x900 at 30 FPS at the very least. I was happy with my 5450 when I had it, but that was also a couple of years ago and I now know after doing some research that I didn't truly have a gaming card.
I am looking at either the Radeon HD 6670 or the Radeon HD 7750.
Will my power supply be able to handle either of those cards?
Will they give me the performance I am looking for?
Is my CPU still good enough even though it is technically outdated now? Should I be worried about fitting those cards into my case?
Your system is a bit outdated, but it should handle a 7750 just fine. I don't know if you will get Ultra settings in WOW though. In order to get that (especially in more demanding games) you will need to build or buy a new system.