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Upgrading AGP screen controllers
22 - English A26361-D1562-Z120-2-6319
Upgrading AGP screen controllers
Technical data:
The AGP slot supports the modes 4x/8x with 32 bits and 66 MHz. Only 1.5 V AGP graphics cards
are supported.
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Some older 3.3 V AGP graphics cards are coded like 1.5 V AGP graphics cards. The
installation of such 3.3 V AGP graphics cards can cause serious damage to the
mainboard and the AGP graphics cards.
Adding PCI cards
Technical data:
32 bit / 33 MHz PCI slots
5 V and 3.3 V supply voltage
3.3 V auxiliary voltage
PCI bus interrupts - Selecting correct PCI slot
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To achieve optimum stability, performance and compatibility, avoid the multiple use of ISA
IRQs or PCI IRQ Lines (IRQ sharing). Should IRQ sharing be unavoidable, then all
involved devices and their drivers must support IRQ sharing.
PCI IRQ Lines connect AGP slots, PCI slots and onboard components to the interrupt controller.
PCI IRQ Lines are permanently wired on the mainboard.
Which ISA IRQs are assigned to the PCI IRQ Lines is normally automatically specified by the BIOS
(see description in "BIOS Setup").
Monofunctional expansions cards:
Standard AGP and PCI expansion cards require a maximum of one interrupt, which is called the PCI
interrupt INT A. Expansion cards that do not require an interrupt can be installed in any desired slot.
Multifunctional expansion cards or expansion cards with integrated PCI-PCI bridge:
These expansion cards require up to four PCI interrupts: INT A, INT B, INT C, INT D. How many
and which of these interrupts are used is specified in the documentation provided with the card.
The assignment of the PCI interrupts to the PCI IRQ Lines is shown in the following table: