Mac Pro 2,1 suddently shuts down Yosemite.

[Dogma36]

Hello people,

 

 

I have a Mac pro 2,1 running OS X Yosemite, also I had upgraded the graphics card to an Nvidia GTX 570 HD 2.5GB VRAM, the computer runs fine until I open any application then it shuts down, restarts twice and goes back to normal "Sometimes I have to repairr the drive to boot", I had replaced the ram with a kit purchased over E-bay "The seller claims

is compatible" the ram is recognized by the computer, on the following picture yo guys will notice a red light that remains on after it shuts dow, a friend of mine told me that a faulty Power Supply Unit maigth be the issue, what do you guys think?.

 

 

Thanks.

[NetBladeZ]

So what are we suppose to be looking at?

[Dogma36]

So what are we suppose to be looking at?

This is the section where the ram board goes, every time the computers shuts down the red light stays on, the white circle  with the red halo is the actual red light. 

[shoarthing]

Hello people,

I have a Mac pro 2,1 running OS X Yosemite, also I had upgraded the graphics card to an Nvidia GTX 570 HD 2.5GB VRAM, the computer runs fine until I open any application then it shuts down, restarts twice and goes back to normal "Sometimes I have to repairr the drive to boot", I had replaced the ram with a kit purchased over E-bay "The seller claims

is compatible" the ram is recognized by the computer, on the following picture yo guys will notice a red light that remains on after it shuts dow, a friend of mine told me that a faulty Power Supply Unit maigth be the issue, what do you guys think?.

Thanks.

Put original RAM back in, see what happens. If no change, likely to be power demands of "new" Nv card.

 

Personally would look to use more efficient, more modest & more modern GPU with very much lower power requirements: TDP of the 570 is around/over 200W, with the original PSU apparently capable of providing 225W for this purpose . . . . all a bit close to the edge for such an elderly box.

[Dogma36]

Hello Shoarthing,

 

 

I had checked the ram, it seems to be the issue, I had ordered a  new ram kit to test, I forgot to mention also, whenever I star an application it launches fine but when I click to open or import a document the computer shuts down immediately, this behavior tells you something?.

 

 

Thanks.

[shoarthing]

Hello Shoarthing,

 

 

I had checked the ram, it seems to be the issue, I had ordered a new ram kit to test, I forgot to mention also, whenever I star an application it launches fine but when I click to open or import a document the computer shuts down immediately, this behavior tells you something?.

 

 

Thanks.

. . . what this 'tells' is pretty obvious, and you know it as well or better than any of us: you have an unstable computer and/or computing environment.

 

Return it to a stable state, then change one component (software/hardware) at a time until it ceases to be stable - then check that component elsewhere/on another system.