IRQ Sharing with Firewire/USB controller/Video Card/Sound card



Does it matter if on Windows XP SP2 on an APIC system for your video
card (9600XT in my case) to share an IRQ with the USB Universal Host
controller and the IEEE 1394 Host controller?

My 9600XT is on IRQ 16 and so are two USB Host controllers and an
IEEE1394 controller.

My Audigy is on IRQ 19 also shared with another USB Host controller.

Could this cause any problems? I am noticing in Far Cry and Doom 3
(demo) that the system pauses/jerks (without loosing sound though - like
its dropping frames), when new sounds start or doors open etc.

System specs:
Intel Pentium 4 3.0GHz (1MB cache, 800FSB) with HT (Prescott)
MSI 865PE NEO-2 P MS-6728 Ver 2 (No D-bracket) 3.50 AMI BIOS
Nanya 2 x 256MB dual channel DDR RAM (PC3200) 400MHz
256 Mb ABIT 9600XT (Catalyst 5.1)
FSP Group FSP300-60PN 300W +3.3@28A, +5V@30A, +12V@18A, [email protected],
[email protected], [email protected]
Western Digital 160GB 7200rpm hard drive with 8MB buffer
Creative Audigy 2 ZS with Creative Inspire P580 speakers (5.1 surround)
Sony DVD-ROM drive (16x)
Sony DW-D22A Dual-Layer IDE DVD+/-RW (black)
Speedtouch router via onboard Realtek lan port
Windows XP Pro SP2
memtest86 1.27: 7.5 hour all tests no errors
Motherboard Monitor Voltages: [email protected], [email protected], [email protected]
3DMark2001: 13200, 3DMark2003: 3800, 3DMark2005: 1600

Mark L. Ferguson

No, ACPI, and IRQ sharing are a normal part of XP. The game performance is more likely associated with a video card or driver


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