i've had my POWERCOLOR ATI 4870x2 for a month and i am very happy. falcon 4 allied force works great. however you must 1. disable catalyst AI 2. you must turn off AA.
remember that F4;AF is a very old game.
LOCK ON also works great, you can use catalyst AI and AA. sometimes the clouds may flicker (rarely) if that happens press F8 a few times and the clouds will be normal.
new games like need for speed undercover, work perfectly.
long live ATI !

I have the vanilla 4870 with 512 megs and it is simply the best video card i have ever owned. The stock cooler was ridiculously ineffectual, so i had to buy an after market cooler (Arctic Cooling Accelero) and it has been transformed.

With the crappy stock fan unit (which was unbearably loud as well) the card temps were well over 70 degrees at idle. Yes - 70+ degrees AT IDLE! Shame on you Sapphire! With the new cooler, which is completely silent, idle temp is now 44 degrees, and I can massively overclock the card and get amazing frame rates on all my games and still keep the card around 65 degrees. Stunning.

I think your saying Celsius not Fahrenheit
. Right?