Just don't buy into DMA, its not worth it at all.
1. It's not about the config space of the PCI cards; it's about the fact that you need to make the card behave like the one your flashed firmware resembles. Meaning emulating features/behavior of the device.
No matter how good your firmware is or how good the "emulation" is for your firmware there is still signs that its not the correct device
And to make it even worse, EAC don't really care they will just block ur card from working and not ban you.
2. There is a lot of firmware guides you can find online, but none of them will work for current EAC on Rust.
3. Before DMA detection, you could go a very long time, my personal record is 798 hours rage hacking on internal DMA cheat on Facepunch servers, my account had 7 tempbans.
If you are interested in investing into DMA and want safety I would probably say go buy HPTT for 4,500 dollar, its overpriced but that's the closest you can come in terms of safety on EAC.
The bundle for 4,500 contains everything you need such as
- Hybrid PCIe Trace Tool
- All required cables and OCuLink connectors
- 1x Intel AX210 Wi-Fi Card (Used as the device firmware 1:1 with full device support)
- DMA card itself
- HDMI Fuser
- Makcu for aimbot usage
Good luck