MSI MEG B550 UNIFY User Manual - Page 33

CPU mode, BIOS > SETTINGS > Advanced > PCI sub-system

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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 selection). In these two modes, they provide different PCIe bandwidth for M2_2 and M2_3 slots, please refer the table below for details. Slot Chipset Mode CPU Mode PCI_E1 @ 4.0/ 3.0 x16* @ 4.0/ 3.0 x8* PCI_E2 - 3.0 x1 3.0 x1 PCI_E3 - 3.0 x1 3.0 x1 PCI_E4 - @ 3.0 x4 - @ 3.0 x4 M2_1 4.0/ 3.0 x4* 4.0/ 3.0 x4* M2_2 3.0 x2 Empty 4.0/ 3.0 x4* M2_3 3.0 x2** 4.0/ 3.0 x4*/** M2_4 3.0 x4 Empty 3.0 x4 Empty (─: unavailable, @: graphics card) * PCIe/ M.2 specifications may vary depending on the CPU installed. ** The SATA5 and SATA6 ports will be unavailable when installing M.2 PCIe SSD into M2_3. The SATA5 port will be unavailable when installing M.2 SATA SSD into M2_3. ⚠⚠Important ∙∙Enabling CPU mode, please go to BIOS > SETTINGS > Advanced > PCI sub-system Settings > PCI_E1 Lanes Configuration and configure the PCIe Lanes to x8/x4/x4 for PCI_E1, M2_2 and M2_3 slots first. In CPU mode, the PCI_E1, M2_2 and M2_3 slots share the same PCIe bandwidth. ∙∙In CPU mode with AMD RyzenTM 5000 & 3000 series processors (not compatible with AMD RyzenTM 5 3400G & RyzenTM 3 3200G) , if you install the MSI M.2 Xpander series add-in card into PCI_E1 slot, only two M.2 slots of the add-in card are available. ∙∙In CPU mode with AMD RyzenTM 4000-G series processors, if you install the MSI M.2 Xpander series add-in card into PCI_E1 slot, only one M.2 slot of the add-in card is available. Overview of Components 33

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33
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 selection). In these two modes, they provide
different PCIe bandwidth for M2_2 and M2_3 slots, please refer the table below for
details.
Slot
Chipset Mode
CPU Mode
PCI_E1
@ 4.0/ 3.0 x16*
@ 4.0/ 3.0 x8*
PCI_E2
—
3.0 x1
3.0 x1
PCI_E3
—
3.0 x1
3.0 x1
PCI_E4
—
@ 3.0 x4
—
@ 3.0 x4
M2_1
4.0/ 3.0 x4*
4.0/ 3.0 x4*
M2_2
3.0 x2
Empty
4.0/ 3.0 x4*
M2_3
3.0 x2**
4.0/ 3.0 x4*
/
**
M2_4
3.0 x4
Empty
3.0 x4
Empty
(─: unavailable, @: graphics card)
* PCIe/ M.2 specifications may vary depending on the CPU installed.
** The SATA5 and SATA6 ports will be unavailable when installing M.2
PCIe
SSD into
M2_3. The SATA5 port will be unavailable when installing M.2
SATA
SSD into M2_3.
⚠
Important
∙
Enabling
CPU mode
, please go to
BIOS > SETTINGS > Advanced > PCI sub-system
Settings > PCI_E1 Lanes Configuration
and configure the PCIe Lanes to
x8/x4/x4
for
PCI_E1, M2_2 and M2_3 slots first. In
CPU mode
, the PCI_E1, M2_2 and M2_3 slots
share the same PCIe bandwidth.
∙
In
CPU mode
with
AMD Ryzen
TM
5000 & 3000
series processors (not compatible with
AMD Ryzen
TM
5 3400G & Ryzen
TM
3 3200G) , if you install the MSI M.2 Xpander series
add-in card into PCI_E1 slot, only two M.2 slots of the add-in card are available.
∙
In
CPU mode
with
AMD Ryzen
TM
4000-G
series processors, if you install the MSI M.2
Xpander series add-in card into PCI_E1 slot, only one M.2 slot of the add-in card is
available.