MSI B450 TOMAHAWK

15
Overview of Components
BAT1
PCI_E1~5: PCIe Expansion Slots
PCI_E1: PCIe 3.0 x16*/ PCIe 3.0 x8**/ PCIe 3.0 x4***
PCI_E2: PCIe 2.0 x1
PCI_E3: PCIe 2.0 x1
PCI_E4: PCIe 2.0 x4
PCI_E5: PCIe 2.0 x1
Important
y 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.
y For a single PCIe x16 expansion card installation with optimum performance, using
the PCI_E1 slot is recommended.
y 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.
y PCI_E4 will run x2 speed when installing devices in PCI_E2/ PCI_E3 slot.
* For Ryzen™ 1st and 2nd Generation processors
** For Ryzen™ with Radeon Vega Graphics processors
*** For Athlon™ with Radeon Vega Graphics processors
PCIe bandwidth of Multiple graphics cards
Slot Single 2-Way
PCI_E1 (CPU)
3.0 x16*
/1
or
3.0 x8*
/2
or
3.0 x4*
/3
3.0 x16*
/1
or
3.0 x8*
/2
or
3.0 x4*
/3
PCI_E2 (PCH) 2.0 x1 2.0 x1 Empty ― ―
PCI_E3 (PCH) 2.0 x1 Empty 2.0 x1 ― ―
PCI_E4 (PCH) 2.0 x2 2.0 x2 2.0 x2 2.0 x4 2.0 x4*
PCI_E5 (PCH) 2.0 x1 2.0 x1
(─: unavailable, *: graphics card,
1
: for Ryzen™ 1st and 2nd Generation processors,
2
: for Ryzen™ with Radeon Vega Graphics processors,
3
: for Athlon™ with Radeon Vega Graphics processors)