System acting WEIRD


my computer locked up... hovering mouse on dock , of sudden froze. had manually restart.

when computer restarted acting strange. getting little artifacts everywhere.

tried start thread problems , computer locked again.

manually restarted, , here now.

far no artifacts on restart...

guys think deal is?
 

attached files:

do have powermac or mac pro? if do, it's possible graphics card (gpu) has come partially unseated. check open (while it's off) , make sure graphics card securely in housing. should , slide cleanly , out of slot occupies.

if don't have 1 of these macs, or if doesn't help, try - go system preferences , change monitor resolution and/or color depth change back. make odd artifacts go away?
 


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