I was wondering if anyone else has encountered a problem with their mac pro freezing up at random times. I've had this computer for a good 4-5 years and recently (mainly playing games), it has randomly locked up on occasion. I cleaned it out with some canned air as well as sprayed off the video card which had some dust built up on the vents and this stopped the problem for a little while but it has recently flared up again. It only happening during games leads me to believe it is a gfx card error, but it has only recently started freezing within the last month or so and I have never had any problems out of it before. Any help would be well appreciated!