1. No need to build a new system, your current system is still fast enough (it will be great if you can OC your quad core to at least 3.0GHz).
2. Yup, of course you MUST upgrade PSU, get a quality brand like COrsair, Antec, OCZ, Seasonic, SilverStone with 500W minimum.
3. For your budget, you can get GTX470 for just $260: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Thanks for the reply... man what a tough choice! Ok, I'm torn between the 470 and the 6870... The prices are the same with the exception of a 10% off promo on the 470 that ends TODAY, so I gotta decide tonight!
Will I even notice a performance difference in these two cards? All the reviews I am reading seem to say the price difference isnt worth the extra $ to get the 470, but they are the same price here!!
worst case scenario, will the card shutdown if it hits 105c? Or will it continue to run until it just burns itself up? I dont want to have to hover over the temps in fear of not catching it before it gets expensive!