harkaz Posted yesterday at 08:47 AM Posted yesterday at 08:47 AM Regarding RTX3080 issue with 128GB RAM, I also tried with PCI express for PGI to Gen3 and Force x8 - in order to start with PCIex8 always in P775TM1. Same behavior (no video). Not a PCI express bus issue. Most likely caused by a failure of the UEFI component of the graphics card to load with 128GB DRAM.
harkaz Posted 7 hours ago Posted 7 hours ago On 9/14/2026 at 3:30 PM, Kyser777 said: On a P870 I cant not boot with dual RTX 3080 16gb vram , danske bios (128gb ram type bios) and 128GB of ram (ballistix crucial ), the laptop just seems to boot with black screen with no BIOS access . I got similar problem and behavior with p775 , 128GB RAM and RTX 3080 16gb vram. I can boot however with 96GB and 112Gb of RAM using the 3 and 4 slots. does someone got the same problem?? I remember that I could boot with 128gb of RAM when I still had a gtx 1080 SLi system. Does the RTX3080 take more resources to prevent 4 slot full with 32GB of RAM (128GB), is there a Bios setting to solve the problem ?? any user has a p870 or p775 config working with 128GB of RAM and RTX 3080?? Thanks Issue fixed. Enable Above 4G decoding and Above 4GB MMIO assignment with modified 128GB BIOS below for P775TM1-G (modification tested on my own config). Sent you a PM for P870DM-G. Additional modifications are needed for RTX3080 driver detection with proper subsys and friendly name display in BIOS Setup. P7xxTM1-0729-9900KS-128G-PCIfixed.7z
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