EVGA Z370 Classified K User Manual page 22

EVGA Z370 Classified K (134-KS-E379)
Card Slots
The Z370 Classified K features three x16 PCIe slots, three x1 PCIe slot, two Socket
3 Key-M M.2 80mm (backwards compatible with Key-M 60mm, and 42mm), and
one Socket 1 Key-E M.2.
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