MSI MPG B550 GAMING EDGE WIFI Manuel D'utilisation page 31

PCI_E1~4: PCIe Expansion Slots
⚠
Important
If you install a large and heavy graphics card, you need to use a tool such as MSI
∙
Gaming Series Graphics Card Bolster to support its weight to prevent deformation of
the slot.
∙ For a single PCIe x16 expansion card installation with optimum performance, using
the PCI_E1 slot is recommended.
When adding or removing expansion cards, always turn off the power supply and
∙
unplug the power supply power cable from the power outlet. Read the expansion
card's documentation to check for any necessary additional hardware or software
changes.
When installing devices in M.2_2, PCI_E2 & PCI_E3 slots at the same time, PCI_E3
∙
slot will be unavailable, and M2_2 slot only supports PCIe x2.
M.2 slots and PCIe slots combination table
Slot
M2_1 (CPU)
M2_2 (PCH)
PCI_E1 (CPU)
PCI_E2 (PCH)
PCI_E3 (PCH)
PCI_E4 (PCH)
(SATA: M.2 SATA SSD, PCIe: M.2 PCIe SSD, X: no device, ✓: available, ─: unavailable)
18
Overview of Components
PCI_E1: PCIe 3.0/ 4.0 x16 (CPU)
PCI_E2: PCIe 3.0 x1 (PCH)
PCI_E3: PCIe 3.0 x4 (PCH)
PCI_E4: PCIe 3.0 x1 (PCH)
PCIe x2 PCIe x4
✓
✓
─
✓
Combination
PCIe/SATA
X
✓ ✓
X ✓
X PCIe x2
✓ ✓
X
✓
X
PCIe x4
✓