Big Sur on Dell Precision T3500

Hello, I have Dell T3500 with:

CPU: Intel Xeon W3530 (Nehalem)

Motherboard: Dell 09KPNV

GPU: Gigabyte GeForce GT 710 2GB

I’m trying to install Big Sur with Opencore, but on shutdown/restart i got cmos checksum error and bios resets. I tried the methods for excluding RTC ranges which helped, but it’s not a preferred solution. So I tried to patch the RTC with RTC0 Method , but i don’t have PNP0A08. Tried with HEDT RTC0-Range, but without success.

Can someone help me to patch it?

submitted by /u/np_44
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