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All replies
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Helpful answers
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Sep 28, 2016 1:44 AM in response to Budkorby lllaass,★HelpfulLikely a graphics card especially if yo have the original card still installed.
However
- Try resetting the SMC and NVRAM/PRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
https://support.apple.com/en-us/HT201295
https://support.apple.com/en-us/HT204063
- Try starting in Safe Mode
OS X: What is Safe Boot, Safe Mode?
https://support.apple.com/en-us/HT201262
- Boot to Recovery and repair the startup disk
OS X: About OS X Recovery - Apple Support
https://support.apple.com/en-us/HT201314
- If it is repairable reinstall the OSX
How to reinstall OS X on your Mac - Apple Support
https://support.apple.com/en-us/HT204904
- If you do not have a backup use disk utility to restore the internal disk to an external disk so you can try to recover data.
Then format the startup disk and do a fresh install of OSX
For selecting a replacement graphics card if necessary see:
User Tip: Mac Pro silver tower (2006-2012) Replacement Graphics cards
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Sep 28, 2016 1:26 AM in response to lllaassby Budkor,Thanks for your reply.
My question is, if it is the problem of the graphics card (nvidia gt7300), how could it display the Apple logo and the circular movement when powered on?
This gt7300 had problem before, but resurrected by baked in the oven for 11 minutes. It worked great for 2 months, then this problem happened last week.
The thing is, that it totally cuts off the video signal just after the Apple logo with the circular movement display, I am wondering if it is problem with the OS hard drives? What do you think?
Anyways I will try to reset NVRAM and Cmos clock etc, and see how it goes.
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Sep 28, 2016 1:44 AM in response to Budkorby lllaass,★HelpfulTry booting from a OSX install disk.
'I suspect a graphics card though since during bootup the full capability of a graphics card is not used.
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Sep 29, 2016 2:43 AM in response to lllaassby Budkor,I tried all above, but nothing worked.
I was able to boot into Single User Mode - non graphic Unix mode.
This seems like the osx hard drive is ok.
As you suggested, the graphics card seems to have gone off.
NVidia gt7300 is a really bad product in reliability. Having said that, it could be
due to the age, maybe about 10 year old?
Should last longer than that, I would have thought.
I am still using a radio made in 1980s without a problem.
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Sep 29, 2016 5:22 AM in response to Budkorby lllaass,Yes, those graphics cards do tend to fail with time.
You can try baking the card
http://lifehacker.com/5823227/save-dying-video-cards-with-a-quick-bake-in-the-ov en
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Sep 30, 2016 1:46 AM in response to Budkorby Budkor,That Gt7300 had been already resurrected by baking in the oven this July.
It worked great for about 2 months, and died again.
I am wondering if another baking in the oven would be feasible or it could
damage the graphic chips and other parts?
If all fails, then I might go for the Nvidia Quartro FX 4500.
Although I have no faith in Nvidia gpu, it seems only option for the Macpro 2.1
How do you distinguish between the FX4500 for Macpro and PC?
Or do they work on both Macpro and PC?
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Sep 30, 2016 7:16 AM in response to Budkorby lllaass,If not a Mac flashed card you will not get a boot screen so you can't use special startups where you have to see the screen like Recovery, boot manager (boot with Option key depressed).
Mac flashed card typically cost more that PC cards and some have a switch to switch between Mac and PC.
I would try baking, nothing to lose
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Oct 3, 2016 10:03 AM in response to lllaassby Budkor,I have an Amd sapphire 1GB PCI-e card from an old decommisioned pc.
Could that be used with the MacPro?
MIne is MacPro 2.1 from 2007.
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Oct 3, 2016 12:04 PM in response to Budkorby lllaass,Which specific Amd sapphire 1GB PCI-e card?
It should have a number like 5770
I suspect it will work but it depends upon the specific card.
IN any event, a PC will result in not getting a boot screen so you can't use special starts like Option key boot manager and Recovery
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Oct 4, 2016 6:34 AM in response to lllaassby Budkor,I will have a close look for the model number of the Sapphire gpu card.
Last night, I quickly plugged the sapphire gpu into my Macpro pci slot after taking out the gt7300.
There was power cable for the sapphire, but it didnt fit into the Macpro power socket.
I ripped out the power supply from the old pc casing, and connected to the sapphire, and it was powering up, when macpro powered on. I could hear the fan noise from the pc power supply box powering the sapphire , and saopphire is in the macpro pci slot.
But the display had no signals at all. Is this a bad sign?
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Oct 4, 2016 7:16 AM in response to Budkorby lllaass,Maybe. It depends upon what card.
Also, your macOS version may not support your card. Some require Mountain Lion and higher
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Oct 4, 2016 3:02 PM in response to lllaassby Budkor,It says, on the card,
Ultimate HD 3850 512M GDDR PCI-E Dual DVI ITVO
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Oct 4, 2016 3:12 PM in response to Budkorby lllaass,Seems to be complicated to make it work. See the middle of page 27 of
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Oct 4, 2016 3:32 PM in response to lllaassby Budkor,yes it sounds very complicated. Plus, my GT7300 is not working, so I dont know how to go to the macpro bios and change or add anything, or install the driver of the 3850?
What would be the simplest, easiest and cheapest way to get the macpro 2.1 operational?
I dont do any fancy graphics. I just use it for doing some eBay, Amazon and emails, and some forum stuff - all text based stuff really.