1. what PSU do you have, make & model #? watts are often misleading. How many rails, amps on the 12v, etc., does it have?
2. at your price range, its a tie between the 4870 & GTX 260 for best card. Tie breaker would be price, bundled games, preferred manufacturer, etc.,
1. your PSU will run the card.
2. depends on the games, some games run better on Nvidia then ATI and vice-versa. Your best bet would be to check video card reviews that test on your favorite games. Either way, both are great games and you cant go wrong with either one.
"bottleneck" is not the correct word. For example, when you say a CPU bottlenecks a graphics card it means that the game won't run any faster even if you get a better graphics chip or overclock the current one. If a PSU isn't good enough your system has either intermittent glitches or completely crashes.
Well in that case, is there a chance my current CPU will bottleneck my soon to be new card (Linked in an earlier post)? i did overclock it from stock 2.6 ghz -> 3.06 ghz stable no issues for a week now...
they had that deal up earlier today, and it sold out in less than an hour! i set it on auto notify and when it came back in stock i got one (if you scroll down the page you can get battle forge or stormrise for free with the card! shipped for free also)