Intermittent Freezing on Mojave

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I am currently using Opencore (0.6.7). I have updated my kexts and made sure everything is in line using Sanity Checker but I'm still getting freezing issues even when I'm just internet browsing. I can't move my cursor and the audio output cuts out, which forces me to do a hard reset.

I can't figure out what's wrong with my system. Can someone please help me?

* Hardware:
CPU: i7 -4702MQ 2.2Ghz
GPU: Intel 4600
RAM: 2x8Gb Crucial 1333MHz CT8G3S1339M.M16FN
Motherboard/Laptop model: IBM THINKPAD T440P
Wifi/BT Card: Broadcom BCM94352Z DW1560
Storage: Samsung 860 QVO 1TB, SanDisk SD6SB1M128G1022I 128GB, TS240GMTS420 (240GB)

 

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