2008 mac pro brand new EVGA GTX 570 fan not working?

You have both power cables connected, right? If so, sounds like the card might be bad.

Edit: Do you have Boot Camp? If so, might be worth trying the card under Windows to see if it works there.

Sounds like a bad card, the fan would have spun at 100% if no power cable were connected - and the card would not work or even show up in the system.

Cool, glad you got it sorted out.

So I've got the same issue with a used GTX 570 card. I've tried to switch cables etc. and my results are that fan is working on average every 3rd time I power on the computer. If I put it on stand by or restart it, GPU fan doesn't work. Only jitters every 5 seconds. Like I said, fan is working every third/fourth time I turn on the computer.

Bad card?

put the card into slot 2, it fixes all the fan issues

Did you have to do any hacks to get the card to work? Did you download drivers from Nvidias site?

you can run a flashed GTX570 card or an un flashed PC GTX570 in the mac pro with the latest nvidia OSX drivers and 10.7.4, the difference between both is the flashed one has a boot screen and link speed of 5.0 the un flashed pc card has not boot screen and has a link speed of 2.5 but still works

Not the Card? Maybe the Mac?

was just playing with a GTX 570 (trying to put together an install-kit combining the hacks to make them work in first gen 1,1 and 2,1 mac pros running 10.7.4 along with the 10.7.4 OpenCL hack)..

i FIRST tried the card in a 2008 3,1 machine with 10.8, to see if it worked without mods (as i had read it would). i got the exact same behavior as previous posters.. in bottom slot the fan would sort of TRY to start spinning every few seconds but never really get going, even if i pushed it along a few times when it looked to by trying..

put the card in two different wintel test systems and the card/fan worked without any problems.. then thought i must not have got it seated all the way? but since i do that 10-20 times a day it seemed unlikely.. tried it in the same 3,1 machine and again fan would try and spin every few seconds, but not get goin..

put the card in FOUR different 1,1 and TWO 2,1 machines and fan spun in them ALL!! made no difference if Boot disk was OSX 10.7.4 Win-XP or Win7 64bit..

tried it in another 2008 3,1 machine, same problem as in first 3,1.. then thought maybe it's time for google.. found this thread, then tried the card in the second slots in BOTH of the 3,1 machines and the fan spun up with no problem, and machines booted into 10.8.. as it had in the other EIGHT machines!

i DON'T have another card to see if it behaves the same way.. when i get another and do same tests i'll post if its behavior is any different in 3,1 machines..

maybe this is a problem with SOME 3,1 machines and SOME GTX 570 cards.. at any rate moving card up one slot seems to make the problem go away..

See the FAQ thread, the first slot problems are a known issue. Recommendation is to use the other 16-lane slot.

anyone find a resolution to the issue? I have a MacPro 3,1 and my GTX570 doesn't work in slot 1, but works great in slot 2. In slot 1 the screen goes black after a minute or so of use and stays that way. In slot 2, no problems.

Gregd7 said:

anyone find a resolution to the issue?

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Yep, don't use slot 1. As I mentioned, it's a well known issue.

issue is a 3,1 issue

for whateer reason, some have issues with Nvidia cards in slot 1

frequently the fan doesn't run

use slot 2 or get a 4,1 or later Mac Pro

^^^^I guess some, but not all. My Gigabyte GTX570, with MacVidCards EFI, is happily residing in slot 1 on my 3,1.

Lou

Same here in my ex Mac Pro 3.1. It was ASUS GTX570 Direct CUII, working perfectly fine under load in Slot 1 with 6-pin to 8-pin adapter (card requires 6 + 8-pin power).

Gtx580

Has anyone tried putting a GTX580 in a Macpro 3,1 slot 1 that's having issues with the GTX570? I've had to put my 570 in slot 2, to make it work. If a GTX580 works, I may consider it, even though I'd have to get some extra power.

Here's an update. While the GTX570 has to be in slot 2 on my MacPro 3,1, the new GTX680 Mac Edition I just installed works great in slot 1.

bax2003 said:

Same here in my ex Mac Pro 3.1. It was ASUS GTX570 Direct CUII, working perfectly fine under load in Slot 1 with 6-pin to 8-pin adapter (card requires 6 + 8-pin power).

Image

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Are you over-clocking this card? Thanks.