How come game systems with the same graphics cards as a PC always have better graphics?

I've noticed that if a game system (arcade system or home console) has the same graphics card as a PC, the game system always shows the game better. Why is that? If you played the same game on a PC, you would have to tone down the graphics.|||I don't think this is true at all, since PC are scalable and consoles/dedicated arcade cabs are not.





A PC can use any hardware configuration it wants. So in theory, PC versions should look better than their console counterparts as long as the hardware is strong enough|||Because the game system usually has a butt-load more RAM, and both the RAM and the processor is devoted entirely to running the game, not a whole bunch of background programs that you may not even ever use.|||i dont think so i always noticed that pc graphis pown console graphics, only reason why it wouldent is if the console had a flat screen and the pc had a crap moniter