How do I fix this IRQ conflict?

[Veraxitas]

I just got one of the new Gigabyte GA-965P - DQ6 motherboards and love it. However, I have an IRQ conflict I cant fix. My 7900GTX and the onboard Marvel Yukon ethernet controller are both sharing IRQ 16. I tried changing the 7900 to the 2nd PCI-E slot but that didnt change anything. I have heard people say that in XP this shouldnt casue a problem, however, I notice a big problem whenever downloading anything my 2D graphics come to a standstill. So something isnt right. is there a way to seperate these two things on seperate IRQs?

 

[CupCak3]

wow i didn't even thing these existed anymore.... i don't think i've had an irq conflict for 4 or 5 years.

you used to be be able to change irqs in the bios depending on the manufacturer.

 

[NuAlphaMan]

Originally posted by: CupCak3


you used to be be able to change irqs in the bios depending on the manufacturer.

Yepper, check you BIOS settings. You should be able to change it there.

 

[Peter]

PCI devices (and related technologies) sharing an IRQ is not a conflict, and there's nothing to be fixed. End of.

And no, this is nothing to do with your observed graphics standstill either. 2D drawing does not even use IRQ signalling.

As usual with perceived "IRQ conflicts", what you need to do is get your mind off that common but useless idea, and track down the ACTUAL problem.

 

[tcsenter]

whenever downloading anything my 2D graphics come to a standstill.

There are quite a number of reports on MSI Forums about a compatability problem between certain MSI motherboards and a handful of graphics cards (mostly NVIDIA 6600 and 6800 based), where 2D screen draws are extremely slow and CPU utilization goes to 100%, completely unrelated to IRQ sharing.

While I realize this doesn't involve an MSI motherboard or NVIDIA 6600/6800, what I am suggesting is that this problem is probably a BIOS tuning issue with your graphics card or GPU, or a driver issue (not an IRQ conflict).

Contact Gigabyte support and inform them about it.

 

[Peter]

Yes indeed. That'll very possibly be a problem in setting up the CPU MTRR (Memory Type Range Registers) for a speedy write path from the CPU to the graphics card RAM. That'll either be a BIOS or driver fsckup.

 

[Veraxitas]

So your telling me that the fact that my ethernet controller and my video card are on the same IRQ is not a problem at all? This will not cause video probs?

 

[Peter]

Yes exactly. As has been said, PCI devices may, and by the book of the specification MUST BE ABLE to flawlessly share an interrupt line. This has been the case ever since PCI has first appeared roundabout 1993.