I asked on another forum.
TPM is not required.
All Series 7 motherboards from Intel will support Secure Boot, that's what i have been told by Intel support. I believe that they are correct. Intel boards has no TPM but since it is not required, it means that all Intel UEFI boards supports/should support Secure Boot.
When Intel solves the issue with Legacy Boot off causing PC to not POST, then Secure Boot will work.