Mac Pro suddenly shuts down.

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hello people,


have mac pro 2,1 running os x yosemite, had upgraded graphics card nvidia gtx 570 hd 2.5gb vram, computer runs fine until open application shuts down, restarts twice , goes normal "sometimes have repairr drive boot", had replaced ram kit purchased on e-bay "the seller claims
compatible" ram recognized computer, on following picture yo guys notice red light remains on after shuts dow, friend of mine told me faulty power supply unit maigth issue, guys think?. also, memory boards mac pro 1,1 work on mac pro 2,1?.


[​img]

thanks.
 

it power supply. need troubleshoot. first, take gtx 570 out, , put factory card in, , see if problem still exists. if so, have problem pointed @ card, or power.

if have same issues factory card, need @ ram. put factory ram in, , see if problem still exists.

yes, memory riser card 1.1 work in 2.1
 


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