my mac pro 2,1 has issues watching videos online. have 8g of ram , ati 5770 installed. these issues started month ago, seemed go away. after apple software update few weeks ago, issue returned , won't go away. installed smc fancontrol, seems buy few minutes of netflix runtime, not much. i've run apple hardware diag., , passed tests. out of frustration pulled old hd out of closet, original 10.4 install on it, , fine hour. however, can't watch netflix tiger, , wasn't able full screen video else online (youtube, amazon, cbs). think it's safe assume tiger stresses hardware less leopard or lion.
tried isolating dimm modules see if memory issue. seem work alike. pulling 1 of riser cards out keeps machine restarts, either 1 work, in either slot.
seems have symptoms point in both hardware , software directions. how can be?
create new user account , see if problem follows.
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