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7900GTX reading as PCIex 8x not 16x?

post #1 of 9
Thread Starter 
I've attached a screenie from the nvidia control panel. It says the graphics card is running as PCIex 8x? The card is a 7900GTX and its in the first PCIex slot. Is there a setting in the BIOS to enable it to run at 16x or is the nvidia control panel wrong? Is there anyway of testing what speed it's working at?

As always rep+ for someone who has an answer on how to fix this or a reason for it?
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post #2 of 9
Yes there is something in your BIOS that should correct it. Dig around in the pci cnnectors it should be in there.


But are you 100% sure its in the first slot?
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post #3 of 9
There's a BIOS switch called "PCI eXpress Configuration" under "Genie BIOS Settings". It can be set to "8-4-NC-8" or "2-1-1-16". However, it doesn't really matter because your 7900GTX won't even use the whole 8x PCIe bandwidth.
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post #4 of 9
Thread Starter 
Cool, restarting to check now. Oh and heres a pic I took yesterday of it in the system.

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post #5 of 9
Wow! that beast aint overheating any time soon good luck with the BIOS.
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post #6 of 9
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
There's a BIOS switch called "PCI eXpress Configuration" under "Genie BIOS Settings". It can be set to "8-4-NC-8" or "2-1-1-16". However, it doesn't really matter because your 7900GTX won't even use the whole 8x PCIe bandwidth.
w00t!!! attached a screenie of it now set to 16x. I know i'll probably never really get better than 8x but still you like to know the headroom is enable if you have it. repped you up because I would of never noticed that setting in BIOS and known what it was for.

Oh and IcedEarth, yeah she idles at around 33'c now, only installed the AS5 and VF900 yesterday so there is some settling still to go, it was at 35'c yesterday. I've got 2 1600rpm Sflex's blowing air onto the chipset and graphics card. The chipset never passes 25'c when idle with that lapped HR05-sli on it.
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post #7 of 9
That's encouraging, as my DFI NF4 w/XFX 7600GT extreme's exhibiting the same problem.

Let ya know if it fixes mine as well. Thanks for doing the footwork on this one.
  
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post #8 of 9
I dont have your problem =) I have the ASUS A8N32-SLi Deluxe.

Even in SLi my cards both run at PCI-e X16
    
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post #9 of 9
Thread Starter 
Quote:
Originally Posted by Distraught_Youth View Post
I dont have your problem =) I have the ASUS A8N32-SLi Deluxe.

Even in SLi my cards both run at PCI-e X16
Tnx for that, i'll sleep better with that information Although you do know that the only cards truly capable of 16x sli are the 8 series (which don't actually fully use 16x), which would be so bottlenecked on a skt939 that it wouldn't even be worth it. But i'm sure all you're unused bandwidth makes you feel warm inside on those cold winter nights

I will never be going sli on skt939, not when one 8 series can beat every previous sli setup out there, so 1 x PCIex 16x lane is good enough for me. Did you ever ask yourself why there are so few sli 16x skt939 mobos out there?
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