TPM Chip for Intel Ultra Series 1

[Aaron_Wimsatt]

I recently purchased a mystery box that had a mainboard that wasn’t working. It was an Intel Ultra 7 155H. Upon inspection I noticed that a chip was missing in the UX1 location. I got the schematics from Framework and identified the part as NPCT750AADYX TPM. Looking online I believe its a nuvoton TPM. However when I contacted support to verify they pointed me to this link

What TPM Version Is Being Used On Our Devices?

This link suggests that it should be an Intel TPM. Would anyone with this mainboard be willing to check this chip so I can get a part number/vendor? Or does someone know where to get a replacement? Here is it’s location on the back of the board:

[GhostLegion]

I can’t answer definitively for you but what I expect happened is that the chip was never meant to be there. The board design simply got reused between generations and it was cheaper to leave the pad in the manufacturing process and just not put the chip there if indeed you have the Meteor Lake board. Just my guess.

[DHowett]

Yes, it appears that other board shots (reddit (mystery box), Phoronix (production)) corroborate that UX1 should not be populated.

Framework does not provide board-level schematics to individuals, but their publicly available interface diagrams were updated with the following commit message:

X out tpm on 7040 and core ultra
7040 has a Pluton TPM
Core Ultra Series 1 uses the Intel fTPM

and the block diagram has this huge red X over top of the discrete TPM:

[Aaron_Wimsatt]

Ah ok. Thank you both for responding. It’s interesting because the image on the Framework website shows it as populated. I also didn’t see the big X on the diagram haha

[GhostLegion]

Yeah, they most assuredly just reused the same shot of the board rather than take whole new pictures when the board didn’t substantially change.

Thank you @DHowett for taking the time to confirm my hypothesis. But there you go, mystery solved!