Maxwell NVIDIA GPUs that are not flashed with Mac EFI will only work with web drivers correctly installed, you need to reinstall the web drivers. Without the web drivers correctly installed and with the NVIDIA NVRAM setting enabled, your GPU won't work and you won't see a screen on your display.GTX 980 (flashed), genuine MID 2010 cMP 5,1 on latest High Sierra 10.13.6 and successfully updated BootROM to 144.0.0.0.0, but no boot after that with GTX 980 - not even a chime.
Hi, I hope some owner of a flashed GTX can share his experience.
First off, thank you @tsialex and all you other competent contributers in this helpful thread.
I am not a computer pro and after seraching for some hours I feel pretty much stranded.
My apologies if this is has been already asked.
I searched this thread but could not find a solution.
To be clear from the beginning:
the MP is not bricked after the BootROM update, well, it doesn't seem to be.
And, I am not interested to install Mojave.
Like it reads in the first line of this post, I succesfully updated to BootROM 144.0.0.0.0 on my cMP 5,1 thanks to tsialex's instructions. I managed to do so with running the latest Mojave Installer (only for the firmware update) and having installed a flashed GTX 980.
No other PCIe slot is in use.
The system is installed on a 2.5" SSD (Anglebird "Apple SSD") which resides in the first HDD bay thanks to a 3.5 to 2.5 adapter.
What I missed to do before the firmware update is to unplug the DisplayPort cable that connects the graphics card to an ultra wide Dell monitor with a lower-than-4k 3440x1440 resolution.
And there was a Wacom tablet attached over USB.
The Mac Pro was and is still on latest High Sierra 10.13.6.
It boots fine after I switched to an old ATI Radeon HD 4870 and connecting it to a 23" Apple Cinema HD display.
In the meanwhile I reset 3 times nvram after I read a comment about doing so in another post.
But there is still no boot when the GTX 980 is installed. I switched between Radeon and GTX a couple of times. The GTX card gets powered, a click and some lights on the mb, some drives spinning up.
No chime, no boot. With the Radeon, immediate booting.
I am writing this post from my MP5,1 with BootROM 144.0.0.0.0 on the latest HS.
Is there any chance that I will get my GTX 980 back to work ?
Thanks for any comment.
Mat
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Btw, every time you clear the NVRAM, you will need to re-enable the NVIDIA NVRAM setting again booting with a working GPU, or using screen sharing/ssh/etc, and then opening Terminal:
Code:
sudo nvram boot-args="nvda_drv=1"
The correct thread for help with NVIDIA drivers is FAQ - Nvidia Web Drivers, your problem is off-topic here and not related to MP5,1 firmware.
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