MSI MEG Z590 UNIFY User Manual - Page 35

CPU mode, BIOS > SETTINGS > Advanced

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PCIe bandwidth configuration table for PCIe & M.2 slots The M2_2 and M2_3 slots can be used under two PCIe bandwidth modes: Chipset mode (default) and CPU mode (by BIOS setting). Please refer the PCIe bandwidth configuration table below for details. Slot Chipset mode (Default) CPU mode (By BIOS setting) PCI_E1 PCI_E2 3.0 x1 4.0* x16 or 3.0 x16 3.0 x1 4.0* x8 or 3.0 x8 PCI_E3 3.0 x1 3.0 x1 PCI_E4 - 3.0 x4 3.0 x1 - 3.0 x4 3.0 x1 M2_1 4.0 x4 (M2_1 slot is available only on 11th Gen Intel® CPU) M2_2 3.0 x4 4.0* x4 or 3.0 x4 M2_3 3.0 x4 4.0* x4 or 3.0 x4 M2_4 3.0 x4 - 3.0 x2 3.0 x4 - 3.0 x2 (─: unavailable) * PCIe 4.0 specification is available only on 11th Gen Intel® CPU. ⚠⚠Important Enabling CPU mode for M2_2 & M2_3 slots, please go to BIOS > SETTINGS > Advanced > PCIe/PCI sub-system Settings > CPU PCIe Lanes Configuration and configure the PCIe Lanes to x8/x4/x4 for PCI_E2, M2_2 and M2_3 slots first. In CPU mode, the PCI_E2, M2_2 and M2_3 slots share the same PCIe bandwidth. Overview of Components 35

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35
Overview of Components
PCIe bandwidth configuration table for PCIe & M.2 slots
The M2_2 and M2_3 slots can be used under two PCIe bandwidth modes: Chipset
mode (default) and CPU mode (by BIOS setting). Please refer the PCIe bandwidth
configuration table below for details.
Slot
Chipset mode (Default)
CPU mode (By BIOS setting
)
PCI_E1
3.0 x1
3.0 x1
PCI_E2
4.0* x16 or 3.0 x16
4.0* x8 or 3.0 x8
PCI_E3
3.0 x1
3.0 x1
PCI_E4
—
3.0 x4
3.0 x1
—
3.0 x4
3.0 x1
M2_1
4.0 x4
(M2_1 slot is available only on 11th Gen Intel® CPU)
M2_2
3.0 x4
4.0* x4 or 3.0 x4
M2_3
3.0 x4
4.0* x4 or 3.0 x4
M2_4
3.0 x4
—
3.0 x2
3.0 x4
—
3.0 x2
(─: unavailable)
* PCIe 4.0 specification is available only on 11th Gen Intel® CPU.
⚠
Important
Enabling
CPU mode
for M2_2 & M2_3 slots, please go to
BIOS > SETTINGS > Advanced
> PCIe/PCI sub-system Settings > CPU PCIe Lanes Configuration
and configure the
PCIe Lanes to
x8/x4/x4
for PCI_E2, M2_2 and M2_3 slots first. In
CPU mode
, the
PCI_E2, M2_2 and M2_3 slots share the same PCIe bandwidth.