Block diagram and schematics for the Sigma, question about PCIe, Coreboot

power_efficiency_nerd · 2026-10-14T05:27:14+08:00

I am considering to buy the Sigma and use it as home server/Proxmox cluster nodes. What I really like:* IBECC * 2 Thunderbold * Low idle power consumption* The modular metal caseWhat I am missing is a block diagram and schematics. I would really like to understand what components the board has exactly and how it is wired up. Also, the i5-1340P has 20 PCIe lanes. A few of them PCIe 4.0. I would really like to understand why they are not exposed on the M.2 slots. Another question I would like to answer is how difficult it would be to port Coreboot. Is Intel BootGuard enabled? See also https://github.com/felixsinger/bootguard-status

power_efficiency_nerd 2026-10-14 05:27:14 93 Views1 Replies
I am considering to buy the Sigma and use it as home server/Proxmox cluster nodes. What I really like:
* IBECC
* 2 Thunderbold
* Low idle power consumption
* The modular metal case
What I am missing is a block diagram and schematics. I would really like to understand what components the board has exactly and how it is wired up. Also, the i5-1340P has 20 PCIe lanes. A few of them PCIe 4.0. I would really like to understand why they are not exposed on the M.2 slots.

Another question I would like to answer is how difficult it would be to port Coreboot. Is Intel BootGuard enabled? See also https://github.com/felixsinger/bootguard-status