Question about shared irqs and memory.

[Silversierra]

Hi, I just looked at windows xp system information, and looked under conflicts/sharing, and saw several entries, is this bad? I'll list the entries and hope someone can tell me what it means.

System Information report written at: 03/31/05 11:10:11
System Name: VNF4ULTRA
[Conflicts/Sharing]

Resource Device
I/O Port 0x00000000-0x00000CF7 PCI bus
I/O Port 0x00000000-0x00000CF7 Direct memory access controller

I/O Port 0x000003C0-0x000003DF nForce4 PCI-Express Root Port
I/O Port 0x000003C0-0x000003DF NVIDIA GeForce 6600 GT

Memory Address 0xF4000000-0xFBFFFFFF nForce4 PCI-Express Root Port
Memory Address 0xF4000000-0xFBFFFFFF NVIDIA GeForce 6600 GT

IRQ 21 Realtek AC'97 Audio
IRQ 21 Standard Dual Channel PCI IDE Controller

IRQ 23 Standard OpenHCD USB Host Controller
IRQ 23 NVIDIA Network Bus Enumerator

I/O Port 0x00006000-0x0000FFFF PCI bus
I/O Port 0x00006000-0x0000FFFF nForce4 PCI-Express Root Port

Memory Address 0xD0000000-0xDFFFFFFF nForce4 PCI-Express Root Port
Memory Address 0xD0000000-0xDFFFFFFF NVIDIA GeForce 6600 GT

Memory Address 0xE0000000-0xE05FFFFF PCI bus
Memory Address 0xE0000000-0xE05FFFFF Motherboard resources

Memory Address 0xA0000-0xBFFFF PCI bus
Memory Address 0xA0000-0xBFFFF nForce4 PCI-Express Root Port
Memory Address 0xA0000-0xBFFFF NVIDIA GeForce 6600 GT

I/O Port 0x000003B0-0x000003DF PCI bus
I/O Port 0x000003B0-0x000003DF nForce4 PCI-Express Root Port
I/O Port 0x000003B0-0x000003DF NVIDIA GeForce 6600 GT

I/O Port 0x00000290-0x0000030F Motherboard resources
I/O Port 0x00000290-0x0000030F Motherboard resources


It's bad to share irqs right? I have some free irqs, so why are 2 shared?

 

[FlyingPenguin]

Modern mobos share IRQ, and this has been supported by Windows since WinXP. Nothing wrong with it, as long as you're not seeing an error (device with an exlamation mark) in the Windows Device Manager.

 

[Silversierra]

There aren't any exclamations in dev. manager. So it's ok? I thought it might be the cause of a problem I'm having with my graphics card having missing textures. It looks like my graphics card is sharing a good bit of things, could that cause my problems, or is that normal?

 

[Jeff7]

Despite your sig, I'll still offer some info.


IRQ sharing used to be bad. ISA cards couldn't share their IRQ, or else both devices would stop working. PCI added IRQ sharing, which usually worked. Nowadays, either the motherboards or the OS or both have made IRQ sharing work well. And there are now additional IRQs, just in case. They used to go up to only 15, but now there are more (I forget how many exactly).
But my system currently has these shares:
IRQ 16: TV Tuner, VIA Rev5 or later USB Universal Host Controller
IRQ 19: Radeon 9800 Pro, VIA Rev5 or later USB Universal Host Controller
IRQ 20: nVidia APU, OpenHCD USB Host Controller
IRQ 21: nVidia codec interface, IEEE 1394 controller, Enhanced PCI to USB Host Controller
IRQ 22: nVidia NIC, OpenHCD USB Host Controller

Most have two devices, except IRQ 21, which has 3.


Is your videocard overclocked? Driver problem maybe?

 

[Silversierra]

Thanks for the response. No it's not overclocked. I did overclock it a few months ago (2), but it was like that for around two hours, and I made sure the temps stayed less than 60c. It didn't help much by oc'ing it (only 3000 aq3 points, 50000 to 53000) since it wasn't a noticeable difference, I set it back to stock ever since. I've tried several drivers (66.xx and 71.80 and now 76.41). No difference in the problem(although the 76.41's are awesome, way faster than the other ones). I haven't updated my mobo chipset driver, could that be it? I don't know if the problem existed before I overclocked or not, the games it has missing textures in I installed after I oc'ed. Can low 12v power do this type of thing? My rail is a little low.

 

[Creston]

Originally posted by: Silversierra
Thanks for the response. No it's not overclocked. I did overclock it a few months ago (2), but it was like that for around two hours, and I made sure the temps stayed less than 60c. It didn't help much by oc'ing it (only 3000 aq3 points, 50000 to 53000) since it wasn't a noticeable difference, I set it back to stock ever since. I've tried several drivers (66.xx and 71.80 and now 76.41). No difference in the problem(although the 76.41's are awesome, way faster than the other ones). I haven't updated my mobo chipset driver, could that be it? I don't know if the problem existed before I overclocked or not, the games it has missing textures in I installed after I oc'ed. Can low 12v power do this type of thing? My rail is a little low.

I like your sig just fine, don't listen to Jeff

I would definitely upgrade your mobo chipset drivers, also flash the BIOS, see if it stays. Does your card have this issue on ALL the games you play though? It's very unlikely, but OC'ing might have damaged something...
And yes, a low 12V rail could cause some of the issues you're seeing, although I would think you would have massive texture corruption, not just some.

Creston

 

[Jeff7]

Either that, or lockups. I've got a flaky PSU here, with a low 3.3v line, and when the CPU is stressed, after a while, the system just flat out locks up.