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z790 maximus hero with 14900ks not showing my 4090

xZodiiac
Level 8

Hello, I just got my 14900ks installed on my z790 Maximus Hero and ONLY the iGPU works, I think it could be a bios problem because I put my 13900ks back in there and it works. Is there a bios update coming out for this MB to be compatible with this processor anytime soon?

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3 REPLIES 3

Spork72
Level 7

Try disabling VMD controller in bios. Seems to be an issue with 14900ks not booting into OS with it enabled 

xZodiiac
Level 8

Well, I ended up finding out what the problem was. It was the GPU. The funny thing is that it worked in my second build. but not with my 14900ks. so I had to get another 4090 that did work with it. I know this doesn't make sense at ALL, but I had to do what I had to do. lol

Did you compare what VBIOS the old 4090 was on? Is it the same SKU? 

Glad you got it resolved.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090