http://www.geeks.com/details.asp?invtid=SY...5UC&cat=CCD Also after boot screen when usb card not installed it shows PCI DEVICES: PIC ONBOARD PCI BRIDGE PCI ONBOARD USB CONTROLLER, IRQ9 PCI SLOT 3 ETHERNET, IRQ10 PCI ONBOARD BRIDGE DEVICE PCI ONBOARD IDE PCI BRIDGE VGA, IRQ11 at IRQ settings in Bios there is only 2 option set to either PCI or ISA. I had tried to set it to ISA and then Back to PCI but the problem still exist. I dont find any thing like latency in my bios setting few thing related to this i noticed is - 1. Master Lat. Timer : 40H 2. DMA-0 to DMA-7 Type all set to "Normal ISA" no one is set to "PC/PCI" 3. Power management : disabled 4. Legacy USB KB/MOUSE support : enabled 5.PCI latency timer (PCI clock) : 64 6. DMA Channel 0 to 7 : all set to "PnP" i think this could help