EVGA Z490 DARK (131-CL-E499)
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14. PCIe Slot x16/x8*
PCIe x16/x8 slots are primarily used for video cards. These full-length slots
will provide 8 or 16 lanes of bandwidth to a full-size card, and are backwards-
compatible with x8, x4, and x1-length cards.
Comet Lake-S has 16 PCIe lanes available for routing.
15. PCIe Slot x8/4*
PCIe x8/4 slot can be used for video cards or other devices. PE2, the only
x8/x4 slot on the board, receives either x8 lanes or x4 from the CPU (Page
27), depending upon the peripheral configuration. These full-length slots will
provide up to 8 lanes of bandwidth to a full-size card, and are backwards-
compatible with x8, x4, and x1-length cards.
Comet Lake-S has 16 PCIe lanes available for routing.
16. PCIe Slot x4*
PCIe x4 slot PE3 uses up to 4 Gen 3 lanes from the PCH. This slot is typically
used for sound cards, WiFi, USB, LAN or other peripheral cards. Using this slot
will have no effect on the bandwidth or throughput of the x16 slots used for
SLI because this slot uses only PCH bandwidth.
17. PCIe Slot x4* (x16 Mechanical)
PCIe x4 slot can be used for video cards or other devices. PE4, the only full
x16 mechanical slot that runs at x4 electrically, receives either x4 lanes or x0
from the CPU (Page 27), depending upon the peripheral configuration. These
full-length slots will provide up to 4 lanes of bandwidth to a full-size card, and
are backwards-compatible with x1-length cards.
PCIe x4 slot PE4 uses up to 4 Gen 3 lanes from the CPU. This slot shares 4
lanes with PE2, and will change both PE2 and PE4 to x4 lanes. Using this slot
will disable SLI because SLI requires at least 2 slots capable of x8 bandwidth.
Comet Lake-S has 16 PCIe lanes available for routing.
18. Power Button
This is an onboard power button, and may be used in place of, or in
conjunction with, a front panel power button wired to the board.
Benching systems, or test benches before final assembly, are best served by
using the onboard power because it removes the need to wire a Power/Reset
button or cross posts with a screwdriver, which is a semi-common practice.
This button provides a safer and easier option than jumpering the Power posts.
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