P5B Dlx: PCI-E Link Width Goes from 16x to 1x. Why?

M

Mark099

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Maple Ridge, BC

• Oct 5, 2006

• #1

Hi Gang,

I just bought a new board, CPU, and video card.

Asus P5B Dlx WiFi (Bios: 0711)
Conroe E6300 @ 2.8Ghz (7x400: 1.375v)
XFX GeForce 7950GT
2GB Mushkin PC2-6400 DDR2
OCZ GameXStream 700W

If I raise the FSB beyond 333Mhz, the PCI-E link width goes from 16x to 1x. This essentially means my computer is a slower gamer at 2.8Ghz than 1.86Ghz.

I have read in another forum that it might be related to power. Any other ideas?

 

P

Psycogeec

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Sep 15, 2006

• Oct 5, 2006

• #2

where/how did you get the reading on it?
3D bench went down? cpu-Z reads 1x?
in other words how can i observe this occurance if it happens?

 

nd4spdbh2

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Camarillo, CA!

• Oct 5, 2006

• #3

try locking the PCI and PCIE frequencies at 33/100 mhz respectivly.... this will probably solve ur prob...

And cpuz will tell ur link width along with the nvidia control pannel.

 

OP

M

Mark099

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Maple Ridge, BC

• Oct 5, 2006

• Thread Starter
• #4

Psycogeec said:

where/how did you get the reading on it?
3D bench went down? cpu-Z reads 1x?
in other words how can i observe this occurance if it happens?

Click to expand...

CPU-Z shows the link width.

Yes, 3DMark03 went from 20k at default speed to 14k when overclocked to 2.8Ghz.

Looks like it is a BIOS issue, and I think I have fixed it. It makes a huge difference in performance. For example, at 1x my computer scored ~28k in 3DMark2001 and over 39k with the link width at 16x.

 

nd4spdbh2

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• Oct 5, 2006

• #5

well what was the bios setting that you changed?

 

bing

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• Oct 5, 2006

• #6

Have you try using AFUDOS and CMOS reset ?

 

OP

M

Mark099

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• Oct 5, 2006

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• #7

nd4spdbh2 said:

well what was the bios setting that you changed?

Click to expand...

There is no particular setting -- other than the action of loading setup defaults after flashing the BIOS.

 

OP

M

Mark099

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Maple Ridge, BC

• Oct 5, 2006

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• #8

bing said:

Have you try using AFUDOS and CMOS reset ?

Click to expand...

Others from XS said to use EZ flash.

Clearing the CMOS would likely have the same effect of reflashing.

 

bing

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• Oct 6, 2006

• #9

I take that as no for the answer.

I'm not forcing you to do that !

Btw, those posts on XS are mostly noobs when it comes to bios flashing.

 

OnDborder

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• Oct 6, 2006

• #10

Thanks for the heads up..