I run my pc with this 300 watt psu and there are quad core cpu and 4gb ram and hd 3650 gpu(400 watt requirements).

DOes this mean my pc system will fry soon because i don't have a 500 watt psu??

when i check the box of the video card , i don't understand why it's not printed on it that u need a power supply.

if it doesn't say anything then it means u won't need one.

yeah i just got it from best buy. i dunno what psu it has but it's too much power probably. so does 4850 work without power supply? I will really get it , it was a big mistake to get an ati hd 3650 1gb ddr2. 4850 is 3 times more powerful than 3650.

Check GPUreview.com

i don't wanna get a nvidia gpu. i was looking forward to an ati video card. Which one is the best and has a good price??

Ok i will return it next week and i will get an 4850. DO i need a power supply to run that new hd 4850 card?

i don't know that. if i need it , i gotta go get that too at the same time.

The one i bought was a ATI Radeon Hd 3650 1gb ddr2 for $125.

i saw the 4850's are 512mb gddr3 and it's more than $160. so which one is faster ? come on ! !!

1gb ddr2 or 51mb ddr3 ???