15
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 H55 Express chipset based motherboard series offer two PCI-Express2.0 x16
graphics slots with PE2 being PCI Express 2.0 x16@16 lane slot while PE3 being PCI
Express 2.0 x16@ 4 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. One PCI Express x1 I/O
slot and two 32-bit PCI slots guarantee the rich connectivity for the I/O of peripherals.
And theH55 motherboard is embedded with a mini-PCIE slot that supports WiFi card.
PCI-E2.0 x16by16 LaneSlot
PCI-E2.0 x16by4 Lane Slot
PCI slots
PCI-E2.0 x1 slot
MINIPCI-E slot
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