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Level 1

35 points

Excessive fan

Hello

im hoping someone out there can shed any light.

I have an early Mac Pro 3.1 8 core, 3.2Ghz machine.

Pretty stable machine despite age. I updated to the latest 10.10.4 Yosemite software. Since then 4GB of RAM disappeared only leaving me with 8GB in total and every time I try and render from my 3D scene (Cinema 4d) the fan gets scarily loud I'm worried it's going to cook my Mac. Didn't have that behind prior the update and now worried to render off my sequence in case the fans die. I have tried re-seating the RAM and switching the sticks round with to

and bottom riser but no luck. One thing that is apprarent is the RAM sticks get incredibly hot very quickly after short use whereas this was not the case prior.

Any ideas would be welcomed. Not sure this update is right my my older Mac.

on a separate note. My mac keeps making intermittent chiriping sounds. has been doing so for a couple of years. Definitely not the hard drive as I changed it over a year ago and sound hasn't stopped. the sound appears to be coming from the front of the Mac. The heat sink cover keeps popping open and have taped it down with insulation tape but the heat keeps pulling the tape open. I am aware this chirping sound is a problem with the older Mac Pros.

Look forward to any replies.

Best

Sophia

Posted on Jul 4, 2015 11:01 PM

34 replies

Sophia Author

Level 1

35 points

Jul 7, 2015 11:02 AM in response to lllaass

Thank you so much for the link i will take a look. I am thinking of changing the main drive so it's an SSD one for speed of accessing data and reliability

Sophia Author

Level 1

35 points

Jul 7, 2015 11:04 AM in response to The hatter

and those cards will happily work on my old but lovely mac pro?

lllaass

Level 10

210,411 points

Jul 7, 2015 12:55 PM in response to Sophia

Only concern I see is that the recommended graphics card use a lot of power. The 980 draws 165 watts. The AUX PCcl connections supply

and the aux power plugs are rated at 75 watts each.

while PCLE slots supply a total of 300 watts for all four slots

For more info see:

http://old-macs.com/misc/MacProPCIePower.html

Sophia Author

Level 1

35 points

Jul 7, 2015 1:35 PM in response to lllaass

Yes I would be a little worried to do that. I changed the graphics card two years ago when the original one died. My concern is when I think the single RAM stick failed the graphics card on start up makes quite a loud lower whirl sound which then slows down to normal speed. My mac is plugged into two monitors. It wasn't making that sound when I first purchased it but it has been doing that for 6 months now and not got worse. Worth resetting the SMC? The old graphics card that came with the card made that horrible low frequency whirl for a while until it died. just hope it's not part of the same problem.

Excessive fan