MP 1,1-5,1 Black screen Mac Pro 5.1 and open core

[Krisz]

Hi all

I want to ask for help, I am using mac pro 5.1 and opencore. For some reason, after sleeping I only get a black screen and the monitor shows "no signal", you started this not so long ago, could anyone help? Sorry for the bad English. And one more thing. The windows don't show the exact time for some reason, there is usually always a 2 hour delay, I think it's because of the opencore because something isn't configured well

Thanks in advance

 

[tsialex]

Hi all

I want to ask for help, I am using mac pro 5.1 and opencore. For some reason, after sleeping I only get a black screen and the monitor shows "no signal", you started this not so long ago, could anyone help? Sorry for the bad English. And one more thing. The windows don't show the exact time for some reason, there is usually always a 2 hour delay, I think it's because of the opencore because something isn't configured well

Thanks in advance

Did you replaced the BR2032 Real Time Clock battery? Anything below 3V needs replacement.

Use a real BR2032, CR2032 don't tolerate the high temperatures near the GPU.

 

[KeesMacPro]

The windows don't show the exact time for some reason, there is usually always a 2 hour delay

As @tsialex recommended, I would replace the battery.
For Windows showing 2 hours delay, take a look here:

Fix Windows and macOS Showing Different Times When Dual Booting - Apple Gazette

If your system dual boots both Windows and macOS, you might notice that it’s impossible to get the system clocks to sync. No matter how you change the clock in one OS, it doesn’t fix the problem with the other OS. This is because of a disagreement about time-keeping methodology between Windows...

www.applegazette.com

 

[Krisz]

thanks for everyone
Maybe something is wrong with the machine, not long ago it started to spin under the catalina under a little load, the boost. smc, pram, nvram do the same thing randomly. I repainted the cpu, but to no avail. Today I was playing a game under win11 and I got a black screen and after restarting several times it just returned the oc start menu image. Can't the CPU be faulty? Nowadays, the boosta fan spins a lot during the game! And the copper pipe in the heat sink was like something was leaking and burning on it

Is this what it should look like?