AMD 5770 issue with 2008 Mac Pro

my 8800gt died ran apple store , got 5770. well, works fine under osx , windows 7, under osx before boot, these random flashes , have hard boot go osx without issue. please see attached file reference. it's connected 30" apple cinema display via dual link dvi. happens randomly.

cheers

 

attached files:

• amd5770_issues.mov.zip

  file size:

  2.6 mb

  views:

  53

can try different cable rule out?

also, remove card , re-seat it. if else fails try 1 same apple store.

 

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