PCIe and PCI Expansion Slots

— 

Cover plate, no slot 

n/a 

n/a 

n/a 

n/a 

n/a 

n/a 

n/a 

0 

PCIe2 (5.0 GT/sec)  

x16 

x16 

225 W (75 W + 150 W ext.) [Combined with slot PCIe2.]

3/4 

Full 

For supported graphics accelerator card (secondary) 

Top 

1 

PCIe2 (5.0 GT/sec)  

x8 

x4 

25 W [If slot not occupied by video card in slot PCIe0.]

3/4 

Full 

Not for graphics accelerators. For PCIe expansion cards such as NIC. 

Second 

2 

PCIe2 (5.0 GT/sec)  

(default graphics output) 

x16 

x16 

225 W (75 W + 150 W ext.) [Combined with slot PCIe0]

Full 

Full 

For supported graphics accelerator card (primary) 

Third 

3 

PCIe (2.5 GT/sec) 

x1 

x1 

25 W [If slot not occupied by video card in slot PCIe2.]

Full 

Full 

Not for graphics cards. For PCIe expansion cards such as NIC. 

Fourth 

4 

PCI 

32–bit 

25 W 

Full 

Full 

For 32-bit PCI cards 

Fifth 

5 

PCIe (2.5 GT/sec) 

x8 

x4 

25 W 

Full 

Full 

Not for graphics cards. For PCIe expansion cards such as NIC. 

Sixth