I added the thread I saw on this forum discussing it, a few posters claimed it worked with TPM 2.0 (reddit thread) and the Official Asus page has the following
SABERTOOTH Z87 BIOS 2302
Version 2302
5.32 MB
2017/04/07
1. Modify ASUS SPD information for XMP profile
2. Improved the verification of GPT partition.
3. Removed the card-reader item in popup menu.
4. Support TPM-L R2.0 .
5. Fixed legacy boot fail.
Any of this useful?
https://www.asus.com/us/supportonly/sabertooth%20z87/helpdesk_bios