Since you're budget is like $200 US, I'd say go with a Radeon 4870 1GB and maybe some more RAM. Of course, if you have a 32-bit OS then there isn't too much of a point in investing in the RAM right now, since the video card alone will take 1GB of addressable memory meaning that less than 3GB of you're total RAM will be usable by the OS (probably like 2.5 GB depending on how many other devices you have and what not). You may instead opt to go with a better cooler, unless of course you're worried about voiding your warranty. If you currently have a tower cooler you could add a second fan to it and perhaps add some case fans to help with the temps and perhaps allow you to overclock a little more.
thanks but i need a budgeted Video Card Also they sell a intex accopia 600-watts anyway is it a rated one or is it another generic