u/Polnoch

Recently, my PC died. I had an idea, that it's motherboard, and bought ASUS Prime X670E-PRO WiFi. Finallly, I figured out, it's not motherboard, it's CPU (ryzen 7 7800X3D) - I made things work with another CPU.

Also, I find out, iommu groups of this ASUS are far from perfect.

Tl;dr: Without ACS patch, you can passthrough only first GPU. The second is together with 2.5g network, one of two sata controllers

GPU installed in the first PCIe slot, external USB controller in the second PCIe:

https://pastebin.com/G5HJDJdq

GPU installed in the third slot:

https://pastebin.com/tECQqtpJ

>!I'm going to send this mobo to amazon back, as well as open RMA ticket for CPU - cpu died after 2.5 years, and AMD let you open RMA during first 3 years of your CPU.!<

>!Mobo, where CPU died, is ASRock X670E PG Lightning. Looks like it's known problem, related to a bad bios. And AMD replaces CPU in this case (I hope it will replace my one...). When I tried to fix this problem, I already updated bios to the latest version, which ASRock provides.!<

I don't understand can I connect them or not? According to MB manual, one MB connector is ATX_12V_1, and another is ATX_12V_2. And they're square-like. But GF-13 has one connector like this, and another split on two parts (2 x 4 round-like plugs). I can mechanically connect this second connector to ATX_12V_2. Should I do this to start system? Is it safe, or they're different connectors, different ANSI standarts?

As far as I understand, it's a question: eps 4+4 is it compatible with atx_12v, or not? Mechanically they're fit. But what about electrical compatibility?