hello i have a ati 4850 x2 2gb graphics card on the box it says 650watt power supply is needed but if you do crossfire you need 1000watt. my question is since the card has 2 gpu in it and i enable crossfire in the settings do i need a 1000watt power supply or not thank you for your help
Actually, because a 4850x2 needs about 20 amps at 12 volts for itself, if you are not going to upgrade the system much, a good 500 watt PSU will do. And for CrossFire, a PSU like the Corsair 750TX with its 60 amp 12 volt rail will do nicely.
Factory recommendations are so high because they have no control over the quality of the PSU that you will choose.
I have the same Question, because i buy a Sapphire Radeon 4850 x2 2gb and I have a Power Supply Thermaltake Toughpower XT 850 Watts with 62A, but it would like to be known if with this one my computer might work nicely with two (2) VideoCards 4850 X2 2GB???
Anyhow I am going to buy the second videocard 4850 x2 2gb and I will try in crossfire, because he trusted very much in the quality of Thermaltake and this Power PC, I am sure almost that he was supporting them. Greetings to all.