15
3 * 8 Communications Port (COM2)
4 * 9 Communications Port (COM1)
5 * 6 Sound Card (sometimes LPT2)
6 * 11 Floppy Disk Controller
7 * 7 Printer Port (LPT1)
8 N/A System CMOS/Real Time Clock
9 * 10 ACPI Mode when enabled
10 * 3 IRQ Holder for PCI Steering
11 * 2 IRQ Holder for PCI Steering
12 * 4 PS/2 Compatible Mouse Port
13 N/A Numeric Data Processor
14 * 5 Primary IDE Channel
15 * 1 Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
2-5-3 PCI Express Slot
The P55 Express chipset based motherboard series offer two PCI-Express2.0 x16
graphics slots with PE
2
and PE5 being PCI Express 2.0 x16@
8
lane slot. These two
graphics slots are fully compatible with the latest AMD CrossFireX Technology to
guarantee the fully operational Multi-GPUs graphics function and avoid the possible
installation error. Two PCI Express 2.0 x1 I/O slots and two 32-bit PCI slots guarantee
the rich connectivity for the I/O of peripherals. Otherwise, the motherboard provides
one PCI-Express x4lane slot.
PCI-E2.0 x16@8 Lane Slot
PCI-E2.0 x16@8 Lane Slot
PCI slots
PCI-E2.0 x1 slots
PCI-E x4lane Slot
PCI-E2.0 x1 slots
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