Mojave System Freeze/Hang (10.14.4 - 10.14.5)

Hi,

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I've been suffering from random system hangs. I've just updated to the latest 10.14.5 version of Mojave.

But I've been getting them as early as my first hackintosh on High Sierra... really frustrating as nothing helped so far. I can't find anything in the logs either...

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my symptoms:

• Picture freezes/hangs with the picture visible
• Audio freezes (no sound or loops)
• Cannot move the mouse or any other responses.
• Have to hard reset after such a freeze
• Totally random, sometimes i can last for a day without a freeze and then sometimes it happens every half an hour...

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my system:

• Motherboard: Gigabitye Z68AP-D3 (Rev 1.0 w Legacy bios)
• CPU: i7-2600K
• GPU: RX 580 8GB
• RAM: 14GB DDR3
• I've uploaded my EFI folder here: http://www.filedropper.com/efi

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https://i.redd.it/r8wuimunhdz21.png