Boot issues on 3 different Mac Pro 5,1 - GPU related

[JDLang76]

All systems are 5,1
All systems on High Sierra

System 1
3.33ghz 6 core zeon / 16gb original ram

System 2
2.8ghz quad core xeon / 16gb original ram

System 3
2x 3.46ghz 6 core xeons / 128gb OWC RAM

The 4 graphics cards Im working with
Stock Radeon HD 5770
MSI Radeon HD 7850
Sapphire Pulse RX 580 8gb
GTX 1080 Ti FE Mac Flashed

The issue
All 3 systems have booted both the options menu and OS multiple times successfully. (except no options menu with sapphire)
Then, between yesterday and today, all 3 systems either chime and dont display anything while the fans spin up a bit, or they will boot into OS but not boot menu.
When I swap the cards around, they will function properly. And then they wont.
One example, I put the 1080 ti into a different system, it booted to options menu. Then I turned it off, put a couple of drives in / different cpu tray, and it chimes but freezes after chime.
I have tried every combination of GPU / CPU trays on each system and whether they work or not is totally random. (Yes I am resetting NVRAM and SMC)

Been at this for 3 days.
Please help

 

[crjackson2134]

What bootrom/firmware versions do these systems have, and what (if any) changes were made immediately preceding the boot problems.

I watch with interest...

 

[Soba]

Are all of these systems in the same location? If you're not using an UPS or a lightning/surge arrestor (not the $5 junk "surge suppressors" you buy at the corner store), I am wondering if you had a power problem that fried all 3 systems simultaneously. Otherwise I'm not sure what else would have happened to break all of them, assuming you did not try to install the beta Mojave software/firmware updates that were released yesterday.

I started using robust power protection about 20 years ago after my house was struck by lightning. That surge blew out every network device, switch, network card, and numerous motherboards on systems on my network. Power protection is an excellent investment.

Can you run Apple Hardware Test on any of these systems to see if anything has been damaged? Instructions are here:

https://support.apple.com/en-us/HT201257

 

[JDLang76]

zero changes were made.
just figured it out. Only HDMI ports are consistently working. I'll just live with that.

 

[bsbeamer]

That sounds like a monitor issue, not an issue with your GPU/ports. Check monitor for DP1.2 settings and check cables/adapters.

 

[JDLang76]

That sounds like a monitor issue, not an issue with your GPU/ports. Check monitor for DP1.2 settings and check cables/adapters.

I used 4 different monitors. Double checked monitor DP specs and cables. Thanks!
[doublepost=1551832234][/doublepost]

Are all of these systems in the same location? If you're not using an UPS or a lightning/surge arrestor (not the $5 junk "surge suppressors" you buy at the corner store), I am wondering if you had a power problem that fried all 3 systems simultaneously. Otherwise I'm not sure what else would have happened to break all of them, assuming you did not try to install the beta Mojave software/firmware updates that were released yesterday.

I started using robust power protection about 20 years ago after my house was struck by lightning. That surge blew out every network device, switch, network card, and numerous motherboards on systems on my network. Power protection is an excellent investment.

Can you run Apple Hardware Test on any of these systems to see if anything has been damaged? Instructions are here:

https://support.apple.com/en-us/HT201257

I tried on my very expensive 2000W surge protector/battery backup, a less expensive surge protector, and 2 wall outlets. Thanks!

 

[w1z]

I have had expensive things fail on me in the past and the common factor/culprit that could have caused this at the same time is power delivery. This could have impacted your PSUs, backplanes, CPUs, memory, GPUs and/or monitors, especially if they were all powered on when the issue occurred.

From the example you shared, I am suspecting a PSU, memory or memory + cpu tray issue as it seems the issue occurs when adding more parts and/or increasing power load.

Try this, repeat your testing but add the least amount of parts ie. drives/memory modules and see if there is a difference.

Personally and seeing that they are all 5,1s, I would disassemble all 3 systems, including PSUs and backplanes, to build 1 working system + monitor combination then test the remaining parts on that working system.

 

[JDLang76]

I have had expensive things fail on me in the past and the common factor/culprit that could have caused this at the same time is power delivery. This could have impacted your PSUs, backplanes, CPUs, memory, GPUs and/or monitors, especially if they were all powered on when the issue occurred.

From the example you shared, I am suspecting a PSU, memory or memory + cpu tray issue as it seems the issue occurs when adding more parts and/or increasing power load.

Try this, repeat your testing but add the least amount of parts ie. drives/memory modules and see if there is a difference.

Personally and seeing that they are all 5,1s, I would disassemble all 3 systems, including PSUs and backplanes, to build 1 working system + monitor combination then test the remaining parts on that working system.

I suspected that and already tried that. Thanks!! Like i said, i was at it for days. I did find the answer though. I mentioned that above.