Ok if you have a HD or HD Ready tv it will play up to about 80hz HD Ready or 100hz for a HD.
If you have a dreamcast or ever owned one you would see the difference (i owned 2 tv's one 50hz one 60hz)
on a 50hz tv at 60hz games will look grainy black and white with the image jumping, or you will just get a grey screen but as said before if you have a HD or HD Ready tv your tv plays 60+ hz so you have nothing to worry about, if your tv really was 50Hz
it wouldnt have a HDMI slot
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