EVGA X299 DARK (151-SX-E299)
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Card Slots
The X299 DARK features five x16 PCIe slots, one x4 PCIe slot, one Socket 3 Key-
M M.2 110mm PM1 (backwards compatible with Key-M 80mm, 60mm, and 42mm),
one Socket 3 Key-M M.2 80mm PM2 (backwards compatible with Key-M 60mm,
and 42mm), and one vertical Socket 1 Key-E M.2.
*Note: The M.2 Key-M 80mm and 110mm slots are accessible after the heatsink
cover is removed. The M.2 Key-E 32mm slot is accessible after removing the full
cover over the rear panel connectors. For removal and installation instructions for
these slots, please see Pages 39 – 45. Lastly, the PCIe x4 slot is available after
removing the rubber tab covering the slot.
