Thanks for the info. I was starting to go blind staring at all those bench marks.
One more question. Do you think I will see a big differences between the 1950 and the 4870/4890.
I mean the stats say there is pretty good bump in performance. Sorry to keep asking dumb questions, but money is pretty tight right now and I want to try and make the best purchase.
If you're in the US, and can wait another ten days, a Black Friday deal may let you really stretch your money.
And, what brand/model of PSU do you have? A 4870 needs a quality 500W unit. If yours is as old as your x1950Pro, it probably has a little red voltage switch on it, which by today's standards means it is NOT a quality unit; and/or its aging capacitors may have reduced its capacity. You should be able to pick up a decent 80+ certified 500W PSU (e.g. Antec, Corsair, PC Power & Cooling, Seasonic, or Enermax) for $50-$55. If that chops into your video card budget, not to worry. Even a HD4850 is eight tiers better than what you have now.