Asus E3303 Computer Hardware User Manual


 
ASUS P5K Premium 2-21
2.5.7 AI Slot Detector
This motherboard comes with on-
board LEDs that light up when the
PCIE/PCI devices are not correctly
installed. This is a reminder that
you should reinstall these devices.
Refer to the gure on the right for
the location of the LEDs.
The PCIEx16_1 slot (blue)
supports PCIE x16 cards only.
The AI Slot Detector lights up
when you install a x1 or x4 card
to this slot.
Primary PCI Express x16 slot
The primary PCI Express x16 slot supports PCI Express x16 graphic cards that
comply with the PCI Express specications.
Universal PCI-E slot (max. x4 mode)
This motherboard also supports a Universal PCI-E slot with a maximum speed of 2
GB/s. The operating frequency of this slot changes, depending on the type of PCI
Express card you install. Refer to the table below for details.
The gure shows two graphics cards installed on the primary PCI Express x16 slot
and the Universal PCI-E slot.
If you install two VGA cards, we recommend that you plug the rear chassis
fan cable to the motherboard connector labeled CHA_FAN1 for better thermal
environment. See page 2-30 for the connector location.
Some PCI Express graphics cards cannot operate on x4/x2 mode. We
suggest that you install these cards on the primary PCI Express slot (blue)
to increase system stability.
Some PCI Express devices cannot operate on x4/x2 mode.
Options for Universal PCI Express operating speed
PCI Express slot
Auto Automatically optimizes performance
and functionality according to devices
installed
x4 mode [fast] User gets the best performance but this
mode disables the PCI Express x1 slot
x2 mode [compatible] Always runs at PCI Express x2 speed