Re: IRQ help please!

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: R. McCarty (PcEngWork-NoSpam__at_mindspring.com)
Date: 11/27/04 

Date: Sat, 27 Nov 2004 17:47:03 GMT

Modern motherboards are no longer limited to 16 IRQ lines. Your
system has a Routing Hub that extends the range. As long as the PC
is ACPI compliant, you'll have instances of sharing that are normal.
Manually assigning IRQ's via BIOS will be ignored by a PNP O/S.
The only user level option is to move PCI cards to slots that are not
shared. Usually this is Slots #2 and 5 as counted from the AGP slot.

"dmiranda" <dmiranda@discussions.microsoft.com> wrote in message
news:ADAC40AF-5EDC-48EA-8BCF-183870035423@microsoft.com...
> Hi all,
>
> I just bought a new computer, and its running fairly sluggish in games
> like
> Halo. My OS is Windows XP Home with SP2 installed.
>
> I've installed and ran PCMark04, and am getting a score of 1024 on
> graphics
> (my other scores are around 4000ish).
>
> I've checked my IRQs and here's what they are:
>
> 0 - System Timer
> 1 - Keyboard
> 6 - Floppy Disk
> 8 - CMOS realtime clock
> 9 - Microsoft ACPI Compliant System
> 12 - Mouse
> 13 - Numeric Data Processor
> 14 - Primary IDE
> 15 - Secondary IDE
> 16 - NVidia Geforce FX 5200 (graphics card)
> 18 - Creative SB Audigy (sound card)
> 19 - SiS 900-Based PCI Fast Adapter (onboard ethernet card)
> 19 (Yes, 19) - IEEE 1394 Host Controller
> 20 - SiS 7001 PCI to USB Host
> 21 - Sis 7001 PCI to USB Host
> 22 - Sis PCI to USB Host
>
> IRQs 2,3,4,5,7,10,11,17 are not listed. This leads me to believe that
> they
> are not being used. I've disabled my onboard audio, COM2, game port, and
> Modem through BIOS (Im not using them).
>
> My ethernet, sound card, and video card are all sharing 1 IRQ (16-22 act
> as
> one IRQ), and I need them to be on separate IRQs so that they arent
> competeing for processor time.
>
> How can I move devices to different IRQs? I've tried to go to Device
> manager, and to the properites of my graphics card, and then to the
> resources
> tab - but the option to changes settings is disabled (or greyed out).
>
> Please help! Thanks

Relevant Pages

  • Re: IRQ help please!
    ... >How can I move devices to different IRQs? ... >manager, and to the properites of my graphics card, and then to the resources ...
    (microsoft.public.windowsxp.general)
  • why inter-changing pci slot works?
    ... Sometime it happens that two adjacent PCI cards don't work. ... interchange their slots. ... Is it related to the priority of the IRQs? ...
    (comp.os.linux.development.system)