MSI K9N6SGM-V User Guide - Page 15

PCI Express Slots The PCI Express slots, as a high-bandwidth, low pin count, serial, interconnect technology. PCI Express X16 Slot PCI Express architecture provides a high performance I/O infrastructure for Desktop Platforms with transfer rates PCI Express X1 Slot starting at 2.5 Giga transfers per second over a PCI Express x1 lane for Gigabit Ethernet, TV Tuners, 1394 controllers, and general purpose I/O. Also, desktop platforms with PCI Express Architecture will be designed to deliver highest performance in video, graphics, multimedia and other sophisticated applications. Moreover, PCI Express architecture provides a high performance graphics infrastructure for Desktop Platforms doubling the capability of existing AGP 8x designs with transfer rates of 4.0 GB/s over a PCI Express x16 lane for graphics controllers. You can insert the expansion cards to meet your needs. When adding or removing expansion cards, make sure that you unplug the power supply first. Note: System default is to disable the onboard VGA when you insert a PCI-E graph card, in order to optimize the system performance. If you would like to use both onboard and expansion card graph functions, you have to enter the mainboard BIOS and select Advanced Chipset Features -> OnChip and PCIe VGA selection -> Both exist and Oncip VGA by frame buffer select. PCI (Peripheral Component Interconnect) Slots The PCI slots allow you to insert the expansion cards to meet your needs. When adding or removing expansion cards, make sure that you unplug the power supply first. Meanwhile, read the documentation for the expansion card to make any necessary hardware or software settings for the expansion card, such as jumpers, switches or BIOS configuration. PCI Interrupt Request Routing The IRQ, abbreviation of interrupt request line and pronounced I-R-Q, are hardware lines over which devices can send interrupt signals to the microprocessor. The PCI IRQ pins are typically connected to the PCI bus INT A# ~ INT D# pins as follows: Order1 Order2 Order3 Order4 PCI Slot 1 INT B# INT C# INT D# INT A# PCI Slot 2 INT C# INT D# INT A# INT B# 9