Purple glitches on Sapphire Rx 580 - Mojave

[jossydeleon]

Yesterday I installed a Sapphire Pulse RX580 8 GB to my build. It worked OOB. However, when the system is booting, the screen shows some purples glitches at some point; when the glitches dissapeared the GPU makes a noise and then finish loading and works fine. My GPU is recognized in "About this MAC". and I am using multi-monitor.

My build sleeps and wakes up well. However, when the PC is sleeping, each 3 minutes the FANS and RGB Lights turn on for about a 1 minute then sleep.

Note: I updated my SMBIOS to iMac 19,2 which is similar to my hardware.

- See the video

https://vimeo.com/user99853089/review/342932983/cb8f752439

 

[CrashMidnick]

Purple glitches = just cosmetic, normal behaviour since 10.14.4 or .5.
For your sleep issue, I do not know, maybe a bios setting or a bad Power Management implementation.

 

[jossydeleon]

Purple glitches = just cosmetic, normal behaviour since 10.14.4 or .5.
For your sleep issue, I do not know, maybe a bios setting or a bad Power Management implementation.

Thanks for reply. Yes, after reading several post it looks like is a common problem since 10.14.xx without any solution yet. And related to the sleep, the behavior started when installed my graphic card.

 

[brousseau6933]

Is powernap enabled? Mine is disabled...

 

[jossydeleon]

Is powernap enabled? Mine is disabled...

I already tried enable and disable and still does not work

 

[CrashMidnick]

Check :

lilu + Whatevergreen installed ?
You use iGPU and the RX580 ate the same time ? If yes, headless parameters implemented ? (see this guide)
You seem to use the port limit patch for USB : you need to create a good USB SSDT (see hackintool : click)

 

[tabarus]

earlier thread:~~~~> https://www.tonymacx86.com/threads/...ning-boot-is-there-a-fix.277688/#post-1962403