Is my power supply good enough for these graphic cards?

I am trying to get a new graphics card but i'm not sure whether it will work with my power supply. Ive never done anything like this before, im a complete noob!
On my power supply there is a label which says:
Input: 220-240V/3,15A 50Hz
Output: 250W max.
+5V/16A, +3.3V/20A, +12V/15A, -12V/0.5A, +5VSB/2A
+3.3V & +5V total output power can't eceed 110W
+3.3V & +5V +12V total output power can't exceed 245W
I don't really know what all this means so could someone please tell me if a radeon hd 4650 or 4670 would work? If not, do you know of any other decent casual gaming cards which will work?

Just in case here's the rest of my PC specs:
Packard Bell iXtreme x5620 (M3720)
intel core 2 quad CPU Q8300 @ 2.50GHz (4 CPUs)
4096MB RAM
nvidia nForce 630i/nvidia geForce 7100 (integrated graphics motherboard)
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More about power supply good graphic cards
  1. HD4650/70 or HD5570 which is newer needs less power and has a little performance edge over HD4670. In any case plug your specs in here
  2. Thats really tight on the power front, 180W from the 12V rail isnt much at all, especially since most of your system is powered off of it. Assuming you have a case that takes a normal sized PSU i suggest upgrade to atleast the corsair 400CX, it has twice the power of your current unit and will definitely run something like the 4670 or 5570, your current PSU likely wont based off the numbers from the PSU calculator.
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