Yes, the Delkin Devices POWER CFexpress Type B 128GB is compatible with the Nikon Z8.
Nikon Z8 Slot 1 accepts CFexpress Type B. Delkin Devices POWER CFexpress Type B 128GB has a manufacturer-rated 805 MB/s sustained write speed (no official VPG certification for this SKU) -- clears all Z8 recording modes including N-RAW 12-bit and ProRes RAW HQ 12-bit, which Nikon's own manual states need 300-750 MB/s sustained; Nikon recommends VPG400-rated cards for these modes, but 805 MB/s comfortably exceeds the range regardless of formal certification.
“We recommend the following Type B CFexpress memory cards”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)