IBM System x3300 M4 24
I/O expansion options
The server supports up to six PCIe slots. Slots 1 - 4 are PCIe 3.0 slots. The slots have the following slot 
form factors:
Slot 1: PCIe 3.0 x8; full-height, half-length (requires second processor)
Slot 2: PCIe 3.0 x8; full-height, full-length
Slot 3: PCIe 3.0 x8 (x4 wired); full-height, half-length 
Slot 4: PCIe 3.0 x16 (x8 wired); full-height, full-length
Slot 5: PCIe 2.0 x4 (x1 wired); full-height, half-length
Slot 6: PCIe 2.0 x8 (x4 wired); full-height, half-length (supports optional PCI-X 64 bit/133 MHz 
interposer card)
Depending on the number of processors installed and the type of power supply used, only a subset of the 
slots is available for use as listed in the following table. 
Table 13. Slot availability based on the number of processors installed and the type of power supply used
460 W fixed power 
supply
550 W hot-swap power 
supply
(1 or 2)
750 W hot-swap power 
supply
(1 or 2)
One processor 
installed
Slots 2 - 6 Slots 2 - 6 Slots 2 - 6
Two processors 
installed
Any three slots Any three slots All six slots
Slots 1 - 4 are PCI Express 3.0 slots. Slots 5 and 6 are PCI Express 2.0 slots. Slot 4 accepts a graphics 
processing unit (GPU) at a maximum of 75W power consumption. Slot 6 can be converted to a PCI-X slot 
(64 bit, 133 MHz) by using the kit that is listed in the following table.
Table 14. PCI riser card options
Part number Feature
code
Description Maximum
supported
00D4346 A2SH PCI-X Riser Kit (for slots 6 only) 1 (slot 6 only)