Quote Originally Posted by samsc View Post
thats a little more information - thanks-
you didnt say what video inputs you were using- or how you were using them- which makes it impossible to figure out anything

exactly which OS version? Snow Leopard is not specific enough either.

thanks
but to speed up this thread-

there have started to be problems observed with 10.6.4- ( which is why the exact version is necessary )

poor playback/graphics performance in 10.6.4 observed on 4870 but not GT120- so its graphics driver dependant-

there are internet reports of similar things - but i saw it myself last week with a dutch system
http://boardreader.com/thread/Snow_L...2wzX1gvkb.html

Apple is rushing out some graphics driver fix thing - but its not public yet.

Looks like something got broken in 10.6.4